Pub Date : 2021-06-26DOI: 10.11648/J.IJMSA.20211003.13
M. Hanif, Rehan Zahid, R. Mufti, M. Waqas, Tehreem Naveed
In past few years DLC coatings and bio based lubricants have gained significant attraction due to their excellent tribological properties. Biolubricants showed synergetic behavior with contact surfaces, when used as a lubricant. Reason behind the attraction towards biolubricants is that they are renewable and biodegradable source of energy. The dominant properties of biolubricants are high flash point, less coefficient of friction, good wear resistance, high viscosity index, lower toxicity and high biodegradability. On the other hand, diamond like carbon (DLC) coatings have also gained attraction due to their excellent tribological properties which enables them to reduce the COF and wear of contact surfaces. In literature, many experimental studies have been carried out by researchers on DLC coating and biolubricants to analyze their interaction. Although biolubricants are not much applying in practical tribology fields but their properties are significant as compared to conventional synthetic lubricants. In this review paper, data from past few years published papers have been arranged in an organized manner to study the interaction of DLC coatings with biolubricants. Most widely used DLC coatings (W-DLC, a-C:H DLC, ta-C DLC) and biolubricants (palm oil, coconut oil, canola oil, sunflower oil, jatropha oil and rapeseed oil) were considered for this study. Tribological performance of symmetric (DLC) contacts and asymmetric (DLC and steel) contacts with biolubricants have been analyzed by comparing the average values of coefficient of friction and coefficient of wear. Synergetic behavior was obtained when biolubricants were used with symmetric DLC coated contact while tribological results were not much effective in case of asymmetrical contact of DLC coatings and steel.
{"title":"A Review on Tribological Study of DLC Coatings in Combination with Bio Based Lubricants","authors":"M. Hanif, Rehan Zahid, R. Mufti, M. Waqas, Tehreem Naveed","doi":"10.11648/J.IJMSA.20211003.13","DOIUrl":"https://doi.org/10.11648/J.IJMSA.20211003.13","url":null,"abstract":"In past few years DLC coatings and bio based lubricants have gained significant attraction due to their excellent tribological properties. Biolubricants showed synergetic behavior with contact surfaces, when used as a lubricant. Reason behind the attraction towards biolubricants is that they are renewable and biodegradable source of energy. The dominant properties of biolubricants are high flash point, less coefficient of friction, good wear resistance, high viscosity index, lower toxicity and high biodegradability. On the other hand, diamond like carbon (DLC) coatings have also gained attraction due to their excellent tribological properties which enables them to reduce the COF and wear of contact surfaces. In literature, many experimental studies have been carried out by researchers on DLC coating and biolubricants to analyze their interaction. Although biolubricants are not much applying in practical tribology fields but their properties are significant as compared to conventional synthetic lubricants. In this review paper, data from past few years published papers have been arranged in an organized manner to study the interaction of DLC coatings with biolubricants. Most widely used DLC coatings (W-DLC, a-C:H DLC, ta-C DLC) and biolubricants (palm oil, coconut oil, canola oil, sunflower oil, jatropha oil and rapeseed oil) were considered for this study. Tribological performance of symmetric (DLC) contacts and asymmetric (DLC and steel) contacts with biolubricants have been analyzed by comparing the average values of coefficient of friction and coefficient of wear. Synergetic behavior was obtained when biolubricants were used with symmetric DLC coated contact while tribological results were not much effective in case of asymmetrical contact of DLC coatings and steel.","PeriodicalId":14116,"journal":{"name":"International Journal of Materials Science and Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86468588","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-21DOI: 10.11648/J.IJMSA.20211003.12
Meselu Eskezia Ayalew
Nanotechnology is referred to as the science of nanoscale which is objects that range in nanometers in size. The use of nanomaterials in energy conversion and storage represents an opportunity to improve the performance, density and ease of transportation in renewable resources. Energy is an unavoidable theme in contemporary society, ranging from basic daily life to superior science and technology. Over increasing energy demand and always deteriorating environmental issues, electricity has turn out to be bottleneck and is hindering the development of society. The use of nanotechnology to increase a suite of sustainable power manufacturing schemes is one of the most necessary scientific challenges of the 21st century. The challenge is to design, to synthesize, and to represent new useful nanomaterials with controllable sizes, shapes, and structures. And also now a day’s a serious interset is required to reduce the level of CO2 the use of advanced and environment friendly CO2 seize technologies. Carbon dioxide seize and storage (CCS) applied sciences can also play an necessary function in this direction. Nanotechnology is used to seize CO2 formore than a few industrial processes. This review is ordinarily centered on the role of nanotechnology in the electricity storage, conservation and post-combustion CO2 absorption process. The features of nanomaterials and nanoparticles have been studied in the current work.
{"title":"The Role of Nanotechnology for Energy Storage, Conservation and Post Combustion CO2 Capture in Industry: A Review","authors":"Meselu Eskezia Ayalew","doi":"10.11648/J.IJMSA.20211003.12","DOIUrl":"https://doi.org/10.11648/J.IJMSA.20211003.12","url":null,"abstract":"Nanotechnology is referred to as the science of nanoscale which is objects that range in nanometers in size. The use of nanomaterials in energy conversion and storage represents an opportunity to improve the performance, density and ease of transportation in renewable resources. Energy is an unavoidable theme in contemporary society, ranging from basic daily life to superior science and technology. Over increasing energy demand and always deteriorating environmental issues, electricity has turn out to be bottleneck and is hindering the development of society. The use of nanotechnology to increase a suite of sustainable power manufacturing schemes is one of the most necessary scientific challenges of the 21st century. The challenge is to design, to synthesize, and to represent new useful nanomaterials with controllable sizes, shapes, and structures. And also now a day’s a serious interset is required to reduce the level of CO2 the use of advanced and environment friendly CO2 seize technologies. Carbon dioxide seize and storage (CCS) applied sciences can also play an necessary function in this direction. Nanotechnology is used to seize CO2 formore than a few industrial processes. This review is ordinarily centered on the role of nanotechnology in the electricity storage, conservation and post-combustion CO2 absorption process. The features of nanomaterials and nanoparticles have been studied in the current work.","PeriodicalId":14116,"journal":{"name":"International Journal of Materials Science and Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77209353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-05-15DOI: 10.32732/jma.2021.10.1.15
J. Kwame, E. Yakushina, P. Blackwell
Localised plastic deformation evolution was examined in a near alpha Ti-3Al-2.5V alloy with indent defect and defect free surfaces using digital image correlation, an interrupted uniaxial tensile test and scanning electron microscopy. The main aim was to understand the role of the localised strain evolution at micro scale and the underlying deformation mechanisms that influence the global mechanical behaviour of the material. The microstructures captured at different stages of deformation were processed using a digital image correlation system, whose outputs were analysed through Matlab, to ascertain the localised strain evolution observed in each surface condition. This work found that the strains observed at the deformation bands along the indent defect edge, were significantly higher than those observed in the deformed β phase field. The deformation bands concentrating at the tip of the indent defect acted as a fertile site for early crack nucleation and propagation with a reduced localised fracture strain. For a defect free surface, the absence of defect zones acting as a high stress concentration site meant that strain aggregation was minimised and the α phase field was able to sufficiently accommodate the β phase deformation resulting in higher fracture strains.
{"title":"Influence of Sheet Conditions on In-Plane Strain Evolution via Ex-Situ Tensile Deformation of Ti-3Al-2.5V at Room Temperature","authors":"J. Kwame, E. Yakushina, P. Blackwell","doi":"10.32732/jma.2021.10.1.15","DOIUrl":"https://doi.org/10.32732/jma.2021.10.1.15","url":null,"abstract":"Localised plastic deformation evolution was examined in a near alpha Ti-3Al-2.5V alloy with indent defect and defect free surfaces using digital image correlation, an interrupted uniaxial tensile test and scanning electron microscopy. The main aim was to understand the role of the localised strain evolution at micro scale and the underlying deformation mechanisms that influence the global mechanical behaviour of the material. The microstructures captured at different stages of deformation were processed using a digital image correlation system, whose outputs were analysed through Matlab, to ascertain the localised strain evolution observed in each surface condition. This work found that the strains observed at the deformation bands along the indent defect edge, were significantly higher than those observed in the deformed β phase field. The deformation bands concentrating at the tip of the indent defect acted as a fertile site for early crack nucleation and propagation with a reduced localised fracture strain. For a defect free surface, the absence of defect zones acting as a high stress concentration site meant that strain aggregation was minimised and the α phase field was able to sufficiently accommodate the β phase deformation resulting in higher fracture strains.","PeriodicalId":14116,"journal":{"name":"International Journal of Materials Science and Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74930822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-05-14DOI: 10.11648/J.IJMSA.20211003.11
M. Dosu, Ola Dapo, Odidi Donald Okpo, Adewuyi Sulaiman Olalekan, Egharevba Owen, Ehis-Iyoha Esohe, M. Dauda, Oseghale Faithful, Okpara Efe Godwin, Okoh Kenneth, Abimbade Sunday Felix
In this research, the comparative studies on solubility and thermodynamics properties of natural rubber vulcanizates filled with blends of activated palm kernel shell and carbonized palm kernel shell has been investigated. Palm Kernel Shell (PKS) was locally sourced. washed and sun dried to remove accompanying and moisture. The PKS was then pulverized to particle size, carbonized at 600°C for one hour (1hr) using Carbolite furnaces and chemically activated using 0.1M H3PO4 and 0.1M KOH solutions. The NR-filler loading concentrations of CB/APKS and CB/CPKS were compounded using two-roll mill. The solubility was done using three different solvents of water, kerosene and petrol respectively. The solubility results obtained for CB/APKS and CB/CPKS has no significance difference as the temperature varies when immersed in water. The solubility values observed for CB/APKS and CB/CPKS ranges from 1.06g to 1.19g and 1.03g to 1.19g across the samples respectively. This shows that since the filler is an organic substance, it has little or no affinity for water. In the case of kerosene and petrol, both are organics and the filler is an organic substance which follows the statement ‘like-dissolves-like’ as the temperature increases, the absorption of kerosene is lower than that of petrol. The results recorded for kerosene across the samples of CB/APKS and CB/CPKS ranges from 1.18g to 4.37g and 2.02g to 4.79g while the results for petrol ranges from 2.25g to 4.92g and 2.51g to 4.88g respectively. This may be due to the fact that petrol is volatile and flammable compared to kerosene. The results of the activation energy were a reflection of the solvent’s permeability except for water which showed contrary results. The results of the activation energy obtained for the three solvents across CB/APKS and CB/CPKS were 5.55 KJ/mol for water, kerosene with 9.48 KJ/mol and petrol with 13.61 KJ/mol respectively. The results observed for water might be due to its nature as the universal solvent being entirely different from other solvents in terms of reactivity and anomalous property. This means polar solvents dissolve polar molecules while nonpolar solvents dissolve nonpolar molecules. This research shows that both CB/APKS and CB/CPKS possess great potential in rubber system.
{"title":"Comparative Studies on Solubility and Thermo Dynamics Properties of Natural Rubber Filled with CB/CPKS and CB/APKS Fillers","authors":"M. Dosu, Ola Dapo, Odidi Donald Okpo, Adewuyi Sulaiman Olalekan, Egharevba Owen, Ehis-Iyoha Esohe, M. Dauda, Oseghale Faithful, Okpara Efe Godwin, Okoh Kenneth, Abimbade Sunday Felix","doi":"10.11648/J.IJMSA.20211003.11","DOIUrl":"https://doi.org/10.11648/J.IJMSA.20211003.11","url":null,"abstract":"In this research, the comparative studies on solubility and thermodynamics properties of natural rubber vulcanizates filled with blends of activated palm kernel shell and carbonized palm kernel shell has been investigated. Palm Kernel Shell (PKS) was locally sourced. washed and sun dried to remove accompanying and moisture. The PKS was then pulverized to particle size, carbonized at 600°C for one hour (1hr) using Carbolite furnaces and chemically activated using 0.1M H3PO4 and 0.1M KOH solutions. The NR-filler loading concentrations of CB/APKS and CB/CPKS were compounded using two-roll mill. The solubility was done using three different solvents of water, kerosene and petrol respectively. The solubility results obtained for CB/APKS and CB/CPKS has no significance difference as the temperature varies when immersed in water. The solubility values observed for CB/APKS and CB/CPKS ranges from 1.06g to 1.19g and 1.03g to 1.19g across the samples respectively. This shows that since the filler is an organic substance, it has little or no affinity for water. In the case of kerosene and petrol, both are organics and the filler is an organic substance which follows the statement ‘like-dissolves-like’ as the temperature increases, the absorption of kerosene is lower than that of petrol. The results recorded for kerosene across the samples of CB/APKS and CB/CPKS ranges from 1.18g to 4.37g and 2.02g to 4.79g while the results for petrol ranges from 2.25g to 4.92g and 2.51g to 4.88g respectively. This may be due to the fact that petrol is volatile and flammable compared to kerosene. The results of the activation energy were a reflection of the solvent’s permeability except for water which showed contrary results. The results of the activation energy obtained for the three solvents across CB/APKS and CB/CPKS were 5.55 KJ/mol for water, kerosene with 9.48 KJ/mol and petrol with 13.61 KJ/mol respectively. The results observed for water might be due to its nature as the universal solvent being entirely different from other solvents in terms of reactivity and anomalous property. This means polar solvents dissolve polar molecules while nonpolar solvents dissolve nonpolar molecules. This research shows that both CB/APKS and CB/CPKS possess great potential in rubber system.","PeriodicalId":14116,"journal":{"name":"International Journal of Materials Science and Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77856717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-07DOI: 10.11648/J.IJMSA.20211002.12
Yifang Liu
In recent years, polymer materials used in coal mines have been widely used in coal rock reinforcement, grouting and plugging in coal mines, and have played an important role in coal mine disaster management. However, according to the relevant data, more than 100 accidents have occurred in the use of polymer materials in China ' s coal mines, and most of them are used to reinforce coal and rock mass polymer materials. The use and safety management of polymer materials need to be strengthened. This paper summarizes the characteristics of polymer materials used in underground coal mines, analyzes the problems that may arise in the use of polymer materials used in coal mines and the shortcomings of relevant existing standards, and points out that most of the safety accidents of polymer materials are spontaneous combustion of materials, coal seam combustion and poisoning caused by toxic and harmful gases. The main causes of combustion accidents are too high reaction temperature, insufficient flame retardancy, uncontrollable reaction process, imperfect standards and insufficient safety awareness of the material itself. Reasonable suggestions and measures for preventing similar accidents are put forward to provide technical guidance for the safe use of polymer materials for coal mines.
{"title":"Analysis and Suggestions on the Use of Polymer Materials for Coal Mines","authors":"Yifang Liu","doi":"10.11648/J.IJMSA.20211002.12","DOIUrl":"https://doi.org/10.11648/J.IJMSA.20211002.12","url":null,"abstract":"In recent years, polymer materials used in coal mines have been widely used in coal rock reinforcement, grouting and plugging in coal mines, and have played an important role in coal mine disaster management. However, according to the relevant data, more than 100 accidents have occurred in the use of polymer materials in China ' s coal mines, and most of them are used to reinforce coal and rock mass polymer materials. The use and safety management of polymer materials need to be strengthened. This paper summarizes the characteristics of polymer materials used in underground coal mines, analyzes the problems that may arise in the use of polymer materials used in coal mines and the shortcomings of relevant existing standards, and points out that most of the safety accidents of polymer materials are spontaneous combustion of materials, coal seam combustion and poisoning caused by toxic and harmful gases. The main causes of combustion accidents are too high reaction temperature, insufficient flame retardancy, uncontrollable reaction process, imperfect standards and insufficient safety awareness of the material itself. Reasonable suggestions and measures for preventing similar accidents are put forward to provide technical guidance for the safe use of polymer materials for coal mines.","PeriodicalId":14116,"journal":{"name":"International Journal of Materials Science and Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88614428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-01DOI: 10.11648/J.IJMSA.20211002.11
M. Mouha, D. Tlamsamani, K. Yamni
It is a relatively easy task to the solution of the so-called phase problem in crystallography, by applying ab initio phasing methods for the efficiency of structure solution from single-crystal data. Their effective application to powder x-ray diffraction data is still a real challenge unless the size of the structure is moderate. The percentage of principal success hinges on a number of factors; included are the quality of the experimental pattern, the success of the pattern-decomposition programs, the quality of the extracted structure-factor from the experimental pattern via the Le Bail or Pawley methods, the normalization of structure-factor process, the experimental resolution and the straightforward of the phasing process. This paper aims at providing an overall overview of the reciprocal space RS methods (ab initio phasing methods of crystal structure) as well as the direct methods, Patterson function and maximum entropy methods. This paper will also describe the factors affecting phasing by reciprocal space methods and the limitation of reciprocal space methods. Those are available for carry out the structure solution, in order to provide a clear theoretical account, experimental practice and computing approaches regarding and describe an outline of the solution process of phase problem by powder X-ray diffraction, leads to the best structure solution using practical examples.
{"title":"Crystal Structure: Reciprocal Space Methods for Carry out the Structure Solution from Powder Data","authors":"M. Mouha, D. Tlamsamani, K. Yamni","doi":"10.11648/J.IJMSA.20211002.11","DOIUrl":"https://doi.org/10.11648/J.IJMSA.20211002.11","url":null,"abstract":"It is a relatively easy task to the solution of the so-called phase problem in crystallography, by applying ab initio phasing methods for the efficiency of structure solution from single-crystal data. Their effective application to powder x-ray diffraction data is still a real challenge unless the size of the structure is moderate. The percentage of principal success hinges on a number of factors; included are the quality of the experimental pattern, the success of the pattern-decomposition programs, the quality of the extracted structure-factor from the experimental pattern via the Le Bail or Pawley methods, the normalization of structure-factor process, the experimental resolution and the straightforward of the phasing process. This paper aims at providing an overall overview of the reciprocal space RS methods (ab initio phasing methods of crystal structure) as well as the direct methods, Patterson function and maximum entropy methods. This paper will also describe the factors affecting phasing by reciprocal space methods and the limitation of reciprocal space methods. Those are available for carry out the structure solution, in order to provide a clear theoretical account, experimental practice and computing approaches regarding and describe an outline of the solution process of phase problem by powder X-ray diffraction, leads to the best structure solution using practical examples.","PeriodicalId":14116,"journal":{"name":"International Journal of Materials Science and Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87446060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-17DOI: 10.11648/J.IJMSA.20211001.14
Modou Pilor, B. Hartiti, A. Dioum, H. Labrim, Y. Arba, A. Belafhaili, M. Tahri, S. Fadili, B. Ba, P. Thevenin
ZnO thin films have been prepared by dip coating sol gel method using Taguchi technique. The underlying principle was to make something as little as conceivable the measure of examination and make sense of the best conditions for developing ZnO thin films with great properties. We used a trial plan of L9, with three levels (high, medium, low) and four elements (annealing temperature, precursor concentration, dip coating speed, annealing time). For each paper three sol-gel arrangements were arranged, and test is rehashed three time. We have chosen to carry out the optimization based on the gap energy calculated from the transmittance of the films obtained. Each sample was characterized with spectrophotometer. This characterization allowed us to draw the transmittance curve and to deduce the gap energy of each deposited ZnO thin film. A signal to noise and an analysis of variance (ANOVA) were used to determine the optical and electrical properties. The film that we obtained with the optimal condition was exanimated by using the characterization methods like UV-visible spectroscopy, X-ray diffraction, SEM (Scanning Electron Microscopy) and EDS (Energy Dispersive Spectroscopy). With the legal statement under oath condition, ZnO thin film showed high crystal quality and the transmittance is a greater amount of 90%.
{"title":"The Use of Taguchi Method to Elaborate Good ZnO Thin Films by Sol Gel Associated to Dip Coating","authors":"Modou Pilor, B. Hartiti, A. Dioum, H. Labrim, Y. Arba, A. Belafhaili, M. Tahri, S. Fadili, B. Ba, P. Thevenin","doi":"10.11648/J.IJMSA.20211001.14","DOIUrl":"https://doi.org/10.11648/J.IJMSA.20211001.14","url":null,"abstract":"ZnO thin films have been prepared by dip coating sol gel method using Taguchi technique. The underlying principle was to make something as little as conceivable the measure of examination and make sense of the best conditions for developing ZnO thin films with great properties. We used a trial plan of L9, with three levels (high, medium, low) and four elements (annealing temperature, precursor concentration, dip coating speed, annealing time). For each paper three sol-gel arrangements were arranged, and test is rehashed three time. We have chosen to carry out the optimization based on the gap energy calculated from the transmittance of the films obtained. Each sample was characterized with spectrophotometer. This characterization allowed us to draw the transmittance curve and to deduce the gap energy of each deposited ZnO thin film. A signal to noise and an analysis of variance (ANOVA) were used to determine the optical and electrical properties. The film that we obtained with the optimal condition was exanimated by using the characterization methods like UV-visible spectroscopy, X-ray diffraction, SEM (Scanning Electron Microscopy) and EDS (Energy Dispersive Spectroscopy). With the legal statement under oath condition, ZnO thin film showed high crystal quality and the transmittance is a greater amount of 90%.","PeriodicalId":14116,"journal":{"name":"International Journal of Materials Science and Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87527257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-02-26DOI: 10.11648/J.IJMSA.20211001.13
Fang Liu, Dong Liu, P. Guo, Guo Li, Rui Yang
During the dry-jet wet spinning process of polyacrylonitrile carbon fiber precursor, the fluctuation of the coagulation bath liquid level affects the stability of the nozzle directly. The motion trajectory and the motion intensity in all directions of the fluid during the movement of the fiber in the coagulation bath fluid field were studied. A three-dimensional model of the cross flow and jet collision motion trajectory was established, and the impact of fluids with different strengths on the surface of the coagulation bath was analyzed. Solidification of the liquid surface in the fitting strength of the peak effect of the return wave overflow trough coupled superimposed to determine the coagulation bath surface to eliminate interfering fluctuations affecting factors. Based on the above analysis, a smart device for real-time monitoring of the coagulation bath air layer has been developed by using the damping equipment in the coagulation bath, where the impact of various fluid waves on the liquid surface can be eliminated on fixed point or position. According to the understanding of kiloton dry-jet wet spinning precursor fiber production line, in-depth exploration has been made to control the high dynamic coagulation bath level effectively from the perspective of technology and delicacy management.
{"title":"Delicacy Management on Kiloton Dry Wet Spinning Bath Liquid","authors":"Fang Liu, Dong Liu, P. Guo, Guo Li, Rui Yang","doi":"10.11648/J.IJMSA.20211001.13","DOIUrl":"https://doi.org/10.11648/J.IJMSA.20211001.13","url":null,"abstract":"During the dry-jet wet spinning process of polyacrylonitrile carbon fiber precursor, the fluctuation of the coagulation bath liquid level affects the stability of the nozzle directly. The motion trajectory and the motion intensity in all directions of the fluid during the movement of the fiber in the coagulation bath fluid field were studied. A three-dimensional model of the cross flow and jet collision motion trajectory was established, and the impact of fluids with different strengths on the surface of the coagulation bath was analyzed. Solidification of the liquid surface in the fitting strength of the peak effect of the return wave overflow trough coupled superimposed to determine the coagulation bath surface to eliminate interfering fluctuations affecting factors. Based on the above analysis, a smart device for real-time monitoring of the coagulation bath air layer has been developed by using the damping equipment in the coagulation bath, where the impact of various fluid waves on the liquid surface can be eliminated on fixed point or position. According to the understanding of kiloton dry-jet wet spinning precursor fiber production line, in-depth exploration has been made to control the high dynamic coagulation bath level effectively from the perspective of technology and delicacy management.","PeriodicalId":14116,"journal":{"name":"International Journal of Materials Science and Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89260263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-02-23DOI: 10.11648/J.IJMSA.20211001.12
Han Choi, T. Nakayama, Jinsam Choi
The joining behavior of metal to ceramic was investigated using glass frit media. Glass frit with a composition of 71.5PbO-24Bi2O3-2.5B2O3-1.5ZnO-0.5SiO2 in mol. % was designed to bond forsterite ceramic and SUS 304 metal. The glass frit demonstrated a glass transition temperature of 250°C and a thermal expansion coefficient of 15.9 x 10-6/°C, which isbetween the values of SUS 304 (17.8×10-6/°C) and forsterite (9.9×10-6/°C). The contact angle was smaller than 90° at a temperature of 460°C. Redox reaction at the interface between forsterite and SUS304 was found to appear when the electrons in the metal part moved toward the glass part and the oxygen ions in glass moved to the metal side. The decrease of the surface tension due to the PbO solubility on the forsterite side contributed to the better wetting behavior at low temperature. Due to the ionic bonding nature, the glass was able to chemically react with forsterite ceramic and form a rough boundary. The Fe metal in the SUS 304 was oxidized to form FeO ceramic. A thin FeO layer on the SUS 304 surface helped the glass frit to wet the SUS 304, and clear tight bonding between the glass and SUS 304 was achieved.
{"title":"Wetting and Bonding Behavior of SUS 304 Metal and Forsterite Ceramic with a PbO-Bi2O3-B2O3-ZnO Glass Frit","authors":"Han Choi, T. Nakayama, Jinsam Choi","doi":"10.11648/J.IJMSA.20211001.12","DOIUrl":"https://doi.org/10.11648/J.IJMSA.20211001.12","url":null,"abstract":"The joining behavior of metal to ceramic was investigated using glass frit media. Glass frit with a composition of 71.5PbO-24Bi2O3-2.5B2O3-1.5ZnO-0.5SiO2 in mol. % was designed to bond forsterite ceramic and SUS 304 metal. The glass frit demonstrated a glass transition temperature of 250°C and a thermal expansion coefficient of 15.9 x 10-6/°C, which isbetween the values of SUS 304 (17.8×10-6/°C) and forsterite (9.9×10-6/°C). The contact angle was smaller than 90° at a temperature of 460°C. Redox reaction at the interface between forsterite and SUS304 was found to appear when the electrons in the metal part moved toward the glass part and the oxygen ions in glass moved to the metal side. The decrease of the surface tension due to the PbO solubility on the forsterite side contributed to the better wetting behavior at low temperature. Due to the ionic bonding nature, the glass was able to chemically react with forsterite ceramic and form a rough boundary. The Fe metal in the SUS 304 was oxidized to form FeO ceramic. A thin FeO layer on the SUS 304 surface helped the glass frit to wet the SUS 304, and clear tight bonding between the glass and SUS 304 was achieved.","PeriodicalId":14116,"journal":{"name":"International Journal of Materials Science and Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81127739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-12DOI: 10.11648/J.IJMSA.20211001.11
A. Lawrence, K. Rebecca, Orire Luke, Olajide Benard, Akala Abisayo, A. Olawale
The mechanical and physical properties of fibre reinforced composite boards (FRCB) made from waste paper and recycled polyethylene was investigated. The composite boards were produced at three levels of mixing ratio (50:50, 60:40 and 70:30) and three levels of board density (1000 Kg/m3, 1100 Kg/m3 and 1200 Kg/m3). The fibre from the paper served as the reinforcement while the polyethylene served as the matrix or binder to form the composite board. The board produced was subjected to different standard tests to attain mechanical and physical properties such as modulus of rupture (MOR), modulus of elasticity (MOE), water absorption (WA) and thickness swelling (TS). The mean values obtained for Thickness Swelling after 24 hours and 48 hours ranged from 0.02 ± 0.04 to 6.05 ± 3.21 and 3.06 ±1.27 to 12.59 ±0.05 respectively and that of water absorption after 24 hours and 48 hours ranged from 4.68 ± 0.25 to 15.78 ± 6.15 and 5.36 ± 0.16 to 18.37 ± 6.03 respectively. The mean value for MOR and MOE ranged from 16.36 ± 9.71 to 18.17 ± 6.76 and 3813.4 ± 1938.76 to 4842.8 ± 1381.05 respectively. These results shown that both the WA and TS decreased with the increase in the board density and mixing ratio. On the other hand, MOR and MOE of the board increased with the increase of board density and the mixing ratio. The results obtained from this study shown that natural fibre from waste paper and recycled polyethylene are compatible for use to produce composite material.
{"title":"Effect of Production Variables on the Physico-Mechanical Properties of Fibre-Reinforced Plastic Composites Boards Produced from Waste Paper and Re-Cycled Polyethlene","authors":"A. Lawrence, K. Rebecca, Orire Luke, Olajide Benard, Akala Abisayo, A. Olawale","doi":"10.11648/J.IJMSA.20211001.11","DOIUrl":"https://doi.org/10.11648/J.IJMSA.20211001.11","url":null,"abstract":"The mechanical and physical properties of fibre reinforced composite boards (FRCB) made from waste paper and recycled polyethylene was investigated. The composite boards were produced at three levels of mixing ratio (50:50, 60:40 and 70:30) and three levels of board density (1000 Kg/m3, 1100 Kg/m3 and 1200 Kg/m3). The fibre from the paper served as the reinforcement while the polyethylene served as the matrix or binder to form the composite board. The board produced was subjected to different standard tests to attain mechanical and physical properties such as modulus of rupture (MOR), modulus of elasticity (MOE), water absorption (WA) and thickness swelling (TS). The mean values obtained for Thickness Swelling after 24 hours and 48 hours ranged from 0.02 ± 0.04 to 6.05 ± 3.21 and 3.06 ±1.27 to 12.59 ±0.05 respectively and that of water absorption after 24 hours and 48 hours ranged from 4.68 ± 0.25 to 15.78 ± 6.15 and 5.36 ± 0.16 to 18.37 ± 6.03 respectively. The mean value for MOR and MOE ranged from 16.36 ± 9.71 to 18.17 ± 6.76 and 3813.4 ± 1938.76 to 4842.8 ± 1381.05 respectively. These results shown that both the WA and TS decreased with the increase in the board density and mixing ratio. On the other hand, MOR and MOE of the board increased with the increase of board density and the mixing ratio. The results obtained from this study shown that natural fibre from waste paper and recycled polyethylene are compatible for use to produce composite material.","PeriodicalId":14116,"journal":{"name":"International Journal of Materials Science and Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76024144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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