Abstract The micro-arc oxidation process is used to improve the properties of 6063 aluminum alloy by forming coatings on the surface of the alloy, in order to further enhance the features of the basic micro-arc oxidation coatings, graphene was added into the silicate alkaline electrolyte. The addition of the graphene influences the surface morphologies, thickness, element distributions, phase compositions, wear resistance and corrosion resistance of the formed coatings. They were studied by means of scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, friction and wear testing and an electrochemical workstation. The results show that the microstructure and properties of the coating were modified with the increase of graphene concentration. However, when too much graphene was added, the performance of the coating became worse.
摘要 微弧氧化工艺是通过在 6063 铝合金表面形成涂层来改善其性能的，为了进一步增强基础微弧氧化涂层的特性，在硅酸盐碱性电解液中加入了石墨烯。石墨烯的加入影响了所形成涂层的表面形态、厚度、元素分布、相组成、耐磨性和耐腐蚀性。研究采用了扫描电子显微镜、能量色散 X 射线光谱、X 射线衍射、X 射线光电子能谱、摩擦磨损测试和电化学工作站等手段。结果表明，涂层的微观结构和性能随着石墨烯浓度的增加而改变。然而，当石墨烯添加过多时，涂层的性能会变差。
{"title":"Effect of graphene additive on microstructure and properties of MAO coatings on 6063 aluminum alloy","authors":"Hong Gao, Chao Wang, B. Jiang, Renguo Song","doi":"10.1515/ijmr-2021-8683","DOIUrl":"https://doi.org/10.1515/ijmr-2021-8683","url":null,"abstract":"Abstract The micro-arc oxidation process is used to improve the properties of 6063 aluminum alloy by forming coatings on the surface of the alloy, in order to further enhance the features of the basic micro-arc oxidation coatings, graphene was added into the silicate alkaline electrolyte. The addition of the graphene influences the surface morphologies, thickness, element distributions, phase compositions, wear resistance and corrosion resistance of the formed coatings. They were studied by means of scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, friction and wear testing and an electrochemical workstation. The results show that the microstructure and properties of the coating were modified with the increase of graphene concentration. However, when too much graphene was added, the performance of the coating became worse.","PeriodicalId":14079,"journal":{"name":"International Journal of Materials Research","volume":"4 8","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139148764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
P. S. Prakash, S. Barnwal, Pravin Kumar Shukla, Jitendra Mehta, Prashant Kumar, Ravi Prakash Tewari
Abstract Titanium and its alloys are extensively used for medical implant material due to their superior biocompatibility, corrosion resistance, and strength. However, fabrication of corrosion free titanium and its alloys is still a challenging task since it might affect the surrounding tissues. Therefore, some protection is needed to enhance the performance of the implants in the body in terms of biocompatibility and corrosion resistance. In this work, the hybrid of gelatin-based forsterite–hydroxyapatite synthesized by the sol–gel process was coated by dip-coating on titanium alloy (Ti6Al4V). The variable concentration effects of forsterite–hydroxyapatite in gelatin matrix and the coating applications on the surface morphology as well as corrosion performance of coated substrates were evaluated. The electrochemical corrosion behaviour was investigated through Tafel polarization curves. Outcomes show that the substrate prepared with 5 wt.% of forsterite–hydroxyapatite has a maximum corrosion resistance, crack-free coating, is hermetic and adherent to the substrate.
{"title":"Gelatin-based forsterite–hydroxyapatite hybrid coating on Ti6Al4V to improve its biocompatibility and corrosion resistance","authors":"P. S. Prakash, S. Barnwal, Pravin Kumar Shukla, Jitendra Mehta, Prashant Kumar, Ravi Prakash Tewari","doi":"10.1515/ijmr-2022-0481","DOIUrl":"https://doi.org/10.1515/ijmr-2022-0481","url":null,"abstract":"Abstract Titanium and its alloys are extensively used for medical implant material due to their superior biocompatibility, corrosion resistance, and strength. However, fabrication of corrosion free titanium and its alloys is still a challenging task since it might affect the surrounding tissues. Therefore, some protection is needed to enhance the performance of the implants in the body in terms of biocompatibility and corrosion resistance. In this work, the hybrid of gelatin-based forsterite–hydroxyapatite synthesized by the sol–gel process was coated by dip-coating on titanium alloy (Ti6Al4V). The variable concentration effects of forsterite–hydroxyapatite in gelatin matrix and the coating applications on the surface morphology as well as corrosion performance of coated substrates were evaluated. The electrochemical corrosion behaviour was investigated through Tafel polarization curves. Outcomes show that the substrate prepared with 5 wt.% of forsterite–hydroxyapatite has a maximum corrosion resistance, crack-free coating, is hermetic and adherent to the substrate.","PeriodicalId":14079,"journal":{"name":"International Journal of Materials Research","volume":"37 9","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138949951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract The enthalpies of mixing in liquid alloys of the ternary Ag–Eu–Sn system were determined over a wide range of concentrations by means of isoperibolic calorimetry in the temperature range from 1313 to 1373 K. The partial enthalpies of each component of the ternary system were measured along the following sections: Δ H ̄ Ag ${Delta }{bar{H}}_{text{Ag}}$ along the section with xEu/xSn = 0.28/0.72 up to silver content of about xAg = 0.2 at 1373 K; Δ H ̄ Sn ${Delta }{bar{H}}_{text{Sn}}$ along three sections (xAg/xEu = 0.31/0.69, 0.50/0.50 and 0.70/0.30) up to xSn = 0.35 at 1373 K; Δ H ̄ Eu ${Delta }{bar{H}}_{text{Eu}}$ along the section xAg/xSn = 0.50/0.50 up to xEu = 0.25 at 1313 K. The enthalpies of mixing in the liquid Ag–Eu–Sn alloys show exothermic effects, being more pronounced in the vicinity of the Eu–Sn binary constituent. The minimum value of the integral enthalpy of about −60 kJ mol−1 is observed in the composition region of the congruently melting Eu2Sn phase.
摘要 在 1313 至 1373 K 的温度范围内，通过等压量热法测定了 Ag-Eu-Sn 三元体系液态合金在较大浓度范围内的混合焓。沿以下截面测量了三元体系各组分的分焓：Δ H ̄ Ag ${Delta }{bar{H}}_{text{Ag}}$ 沿 xEu/xSn = 0.28/0.72 截面，直到银含量约为 xAg = 0.2 at 1373 K; Δ H ̄ Sn ${Delta }{bar{H}}_{text{Sn}}$ 沿着三个截面 (xAg/xEu = 0.31/0.69, 0.50/0.50 and 0.70/0.30) 直到 xSn = 0.35 at 1373 K; Δ H ̄ Eu ${Delta }{bar{H}}_{text{Eu}}$ 沿着 xAg/xSn = 0.50/0.50 直至 xEu = 0.25（1313 K）的截面。液态 Ag-Eu-Sn 合金中的混合焓显示出放热效应，在 Eu-Sn 二元成分附近更为明显。在同熔 Eu2Sn 相的成分区域观察到的积分焓最小值约为 -60 kJ mol-1。
{"title":"Enthalpies of mixing in ternary Ag–Eu–Sn liquid alloys","authors":"Michael Ivanov, Natalia Usenko, N. Kotova","doi":"10.1515/ijmr-2023-0063","DOIUrl":"https://doi.org/10.1515/ijmr-2023-0063","url":null,"abstract":"Abstract The enthalpies of mixing in liquid alloys of the ternary Ag–Eu–Sn system were determined over a wide range of concentrations by means of isoperibolic calorimetry in the temperature range from 1313 to 1373 K. The partial enthalpies of each component of the ternary system were measured along the following sections: Δ H ̄ Ag ${Delta }{bar{H}}_{text{Ag}}$ along the section with xEu/xSn = 0.28/0.72 up to silver content of about xAg = 0.2 at 1373 K; Δ H ̄ Sn ${Delta }{bar{H}}_{text{Sn}}$ along three sections (xAg/xEu = 0.31/0.69, 0.50/0.50 and 0.70/0.30) up to xSn = 0.35 at 1373 K; Δ H ̄ Eu ${Delta }{bar{H}}_{text{Eu}}$ along the section xAg/xSn = 0.50/0.50 up to xEu = 0.25 at 1313 K. The enthalpies of mixing in the liquid Ag–Eu–Sn alloys show exothermic effects, being more pronounced in the vicinity of the Eu–Sn binary constituent. The minimum value of the integral enthalpy of about −60 kJ mol−1 is observed in the composition region of the congruently melting Eu2Sn phase.","PeriodicalId":14079,"journal":{"name":"International Journal of Materials Research","volume":" 11","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138960960","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tanaji S. Patil, R. S. Kamble, R. B. Patil, M. V. Takale, S. A. Gangawane
Abstract Nanostructured molybdenum (Mo)-doped Mn3O4 thin films were successfully deposited on stainless steel substrates by a facile electrophoretic deposition technique. The effect of Mo doping on the structural and supercapacitive properties of Mn3O4 thin films was investigated. The nanostructured morphology of spinel tetragonal Hausmannite Mn3O4 thin films was elucidated with the help of X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and Raman studies. The presence of mesopores in the nanostructure with an average pore size of 41 nm was confirmed by Brunauer–Emmett–Teller studies. The different valence states of Mn and Mo are confirmed by X-ray photoelectron spectroscopy. The symmetrical quasi-rectangular-shaped cyclic voltammetry curves without any redox peak and nearly triangular/symmetric galvanostatic charge–discharge curves for Mn3O4 thin films elucidated the pseudocapacitive behavior. Electrochemical impedance spectroscopy revealed that pure and Mo-doped Mn3O4 thin films have lower resistances. Improved supercapacitive performance of 2 % Mo-doped Mn3O4 thin film was confirmed by higher specific capacitance 497 F g−1 at a current density of 1.6 A g−1. The boosted supercapacitive performance of Mo-doped Mn3O4 thin films has identified the outstanding incorporation of Mo ions into the Mn3O4 lattice.
摘要 采用简便的电泳沉积技术，在不锈钢基底上成功沉积了掺杂钼（Mo）的纳米结构 Mn3O4 薄膜。研究了钼掺杂对 Mn3O4 薄膜结构和超级电容特性的影响。在 X 射线衍射、扫描电子显微镜、透射电子显微镜和拉曼研究的帮助下，阐明了尖晶石四方豪斯曼矿 Mn3O4 薄膜的纳米结构形态。布鲁瑙尔-埃美特-泰勒研究证实，纳米结构中存在平均孔径为 41 纳米的介孔。X 射线光电子能谱证实了锰和钼的不同价态。Mn3O4 薄膜无氧化还原峰的对称准矩形循环伏安曲线和近似三角形/对称的电静态充放电曲线阐明了其假电容行为。电化学阻抗谱显示，纯 Mn3O4 薄膜和掺杂 Mo 的 Mn3O4 薄膜具有较低的电阻。在电流密度为 1.6 A g-1 时，掺杂 2 % Mo 的 Mn3O4 薄膜具有更高的比电容 497 F g-1，从而证实了其超级电容性能的提高。掺杂钼的 Mn3O4 薄膜超级电容性能的提高证明了钼离子在 Mn3O4 晶格中的出色掺入。
{"title":"Enhanced supercapacitive performance of electrophoretically deposited nanostructured molybdenum-doped Mn3O4 thin films","authors":"Tanaji S. Patil, R. S. Kamble, R. B. Patil, M. V. Takale, S. A. Gangawane","doi":"10.1515/ijmr-2022-0414","DOIUrl":"https://doi.org/10.1515/ijmr-2022-0414","url":null,"abstract":"Abstract Nanostructured molybdenum (Mo)-doped Mn3O4 thin films were successfully deposited on stainless steel substrates by a facile electrophoretic deposition technique. The effect of Mo doping on the structural and supercapacitive properties of Mn3O4 thin films was investigated. The nanostructured morphology of spinel tetragonal Hausmannite Mn3O4 thin films was elucidated with the help of X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and Raman studies. The presence of mesopores in the nanostructure with an average pore size of 41 nm was confirmed by Brunauer–Emmett–Teller studies. The different valence states of Mn and Mo are confirmed by X-ray photoelectron spectroscopy. The symmetrical quasi-rectangular-shaped cyclic voltammetry curves without any redox peak and nearly triangular/symmetric galvanostatic charge–discharge curves for Mn3O4 thin films elucidated the pseudocapacitive behavior. Electrochemical impedance spectroscopy revealed that pure and Mo-doped Mn3O4 thin films have lower resistances. Improved supercapacitive performance of 2 % Mo-doped Mn3O4 thin film was confirmed by higher specific capacitance 497 F g−1 at a current density of 1.6 A g−1. The boosted supercapacitive performance of Mo-doped Mn3O4 thin films has identified the outstanding incorporation of Mo ions into the Mn3O4 lattice.","PeriodicalId":14079,"journal":{"name":"International Journal of Materials Research","volume":"298 2‐3","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139002106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract BaTi5O11 nanocrystals were synthesized by a hydrothermal method, and the effect of oleic acid (OA) in the Ba–Ti precursors on morphologies of BaTi5O11 nanocrystals was investigated. As the OA/(Ba2+ + Ti4+) molar ratio ranged from 0 to 8, single-phase BaTi5O11 nanocrystals were synthesized at 260 °C for 20 h. When OA reagent was not added to the precursors, rice-like BaTi5O11 nanocrystals were obtained. As the OA/(Ba2+ + Ti4+) molar ratio was 1, elongated lath-like BaTi5O11 nanocrystals were synthesized with the width of about 130 nm, thickness of about 50 nm and length of about 400 nm. With increasing the OA/(Ba2+ + Ti4+) molar ratio from 1 to 6, the grain size of elongated lath-like BaTi5O11 nanocrystals gradually decreased. As the OA content increased, the amount of adsorbed OA molecules on the surface of Ti(OH) x nucleus increased and hindered the reaction of Ba2+ ions with Ti(OH) x nucleus, which caused the decrease of grain size of lath-like BaTi5O11 nanocrystals. When the BaTi5O11 nanocrystals were synthesized at OA/(Ba2+ + Ti4+) molar ratio of 1, they had the largest dielectric constant (εr) of 40.9 at 5 GHz.
{"title":"Effect of oleic acid on morphologies of BaTi5O11 nanocrystals synthesized by hydrothermal method","authors":"Desheng Shi, Wensai Zhang, Long Liu, Renliang Wang, Zhixiong Huang, Dongyun Guo","doi":"10.1515/ijmr-2022-0490","DOIUrl":"https://doi.org/10.1515/ijmr-2022-0490","url":null,"abstract":"Abstract BaTi5O11 nanocrystals were synthesized by a hydrothermal method, and the effect of oleic acid (OA) in the Ba–Ti precursors on morphologies of BaTi5O11 nanocrystals was investigated. As the OA/(Ba2+ + Ti4+) molar ratio ranged from 0 to 8, single-phase BaTi5O11 nanocrystals were synthesized at 260 °C for 20 h. When OA reagent was not added to the precursors, rice-like BaTi5O11 nanocrystals were obtained. As the OA/(Ba2+ + Ti4+) molar ratio was 1, elongated lath-like BaTi5O11 nanocrystals were synthesized with the width of about 130 nm, thickness of about 50 nm and length of about 400 nm. With increasing the OA/(Ba2+ + Ti4+) molar ratio from 1 to 6, the grain size of elongated lath-like BaTi5O11 nanocrystals gradually decreased. As the OA content increased, the amount of adsorbed OA molecules on the surface of Ti(OH) x nucleus increased and hindered the reaction of Ba2+ ions with Ti(OH) x nucleus, which caused the decrease of grain size of lath-like BaTi5O11 nanocrystals. When the BaTi5O11 nanocrystals were synthesized at OA/(Ba2+ + Ti4+) molar ratio of 1, they had the largest dielectric constant (εr) of 40.9 at 5 GHz.","PeriodicalId":14079,"journal":{"name":"International Journal of Materials Research","volume":"21 2","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138974765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Rajita Ramanarayanan, S. Swaminathan, Bhabhina Ninnora Meethal
Abstract The present study reports an economical and environmentally friendly technique for the synthesis of zinc oxide nanoparticles. The water extract of Averrhoa bilimbi (L) fruit was used in this one-pot synthesis approach for ZnO nanoparticle reduction and stabilisation. Varied size, shape and properties of the synthesized nanomaterials were obtained by tuning the pH of the synthesis medium. X-ray diffraction techniques, diffuse reflectance spectroscopy, photoluminescence and scanning electron microscopy analysis were used for characterizing phytochemical capped ZnO nanoparticles. The morphological change with varying pH was observed from scanning electron microscopy images. Short duration of synthesis with high yield product at ambient room temperature are the salient features of this procedure. The synthesised ZnO nanoparticles showed excellent photocatalytic activity and superhydrophilicity to be used in a wide range of applications.
{"title":"Fast and facile pH tailored green synthesized ZnO photocatalyst by biogenic reduction using water extract of Averrhoa bilimbi (L) fruit","authors":"Rajita Ramanarayanan, S. Swaminathan, Bhabhina Ninnora Meethal","doi":"10.1515/ijmr-2022-0433","DOIUrl":"https://doi.org/10.1515/ijmr-2022-0433","url":null,"abstract":"Abstract The present study reports an economical and environmentally friendly technique for the synthesis of zinc oxide nanoparticles. The water extract of Averrhoa bilimbi (L) fruit was used in this one-pot synthesis approach for ZnO nanoparticle reduction and stabilisation. Varied size, shape and properties of the synthesized nanomaterials were obtained by tuning the pH of the synthesis medium. X-ray diffraction techniques, diffuse reflectance spectroscopy, photoluminescence and scanning electron microscopy analysis were used for characterizing phytochemical capped ZnO nanoparticles. The morphological change with varying pH was observed from scanning electron microscopy images. Short duration of synthesis with high yield product at ambient room temperature are the salient features of this procedure. The synthesised ZnO nanoparticles showed excellent photocatalytic activity and superhydrophilicity to be used in a wide range of applications.","PeriodicalId":14079,"journal":{"name":"International Journal of Materials Research","volume":"4 3","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139002560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yue Xing, Zheng Li, Huai Yu Hou, Ying Liu, Jing Tao Wang
Abstract Thanks to the development of quantum mechanics-based crystal structure prediction methods in the past decade, numerous new compounds with low temperature thermodynamic stability, mainly binary intermetallic compounds, have been predicted. Differing from conventional alloy materials, the synthesis of these low temperature stable compounds may be impossible relying on traditional thermal activation methods since thermally activated atomic diffusion at low temperatures is so slow that phase formation may require cosmic-scale time. Strikingly, it has been shown that some special experimental methods can successfully synthesize low temperature stable compounds by introducing a large number of vacancies and defects into the material to enable atomic rearrangement and simultaneously increasing the phase transformation driving force to accelerate the reaction kinetics. This review summarizes the predictions of compounds that have not been experimentally reported to be stable at low temperatures and provides some experimental approaches that can be used for future synthesis. We describe the basic thermodynamics and kinetics of phase formation, show how compound formation is constrained at low temperatures, and illustrate that the formation of some compounds is nearly impossible without enhanced kinetics.
{"title":"Accessing forbidden phases","authors":"Yue Xing, Zheng Li, Huai Yu Hou, Ying Liu, Jing Tao Wang","doi":"10.1515/ijmr-2023-0074","DOIUrl":"https://doi.org/10.1515/ijmr-2023-0074","url":null,"abstract":"Abstract Thanks to the development of quantum mechanics-based crystal structure prediction methods in the past decade, numerous new compounds with low temperature thermodynamic stability, mainly binary intermetallic compounds, have been predicted. Differing from conventional alloy materials, the synthesis of these low temperature stable compounds may be impossible relying on traditional thermal activation methods since thermally activated atomic diffusion at low temperatures is so slow that phase formation may require cosmic-scale time. Strikingly, it has been shown that some special experimental methods can successfully synthesize low temperature stable compounds by introducing a large number of vacancies and defects into the material to enable atomic rearrangement and simultaneously increasing the phase transformation driving force to accelerate the reaction kinetics. This review summarizes the predictions of compounds that have not been experimentally reported to be stable at low temperatures and provides some experimental approaches that can be used for future synthesis. We describe the basic thermodynamics and kinetics of phase formation, show how compound formation is constrained at low temperatures, and illustrate that the formation of some compounds is nearly impossible without enhanced kinetics.","PeriodicalId":14079,"journal":{"name":"International Journal of Materials Research","volume":"48 2","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138633047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mukesh Kumar, Ashish Das, R. Ballav, Niraj Kumar, Keshav K. Sharma
Abstract In this current research work, magnesium AZ61 (Advancing Side) and aluminum 6061-T6 (Retreating Side) alloys were joined using the zinc interlayer friction stir welding technique at the optimum process parameters. The aim of this work is to propose an effective alternative to overcome issues related to aluminum/magnesium joints. This article investigates the effects of zinc foil (0.2 mm) on the weld surface (3 mm aluminum/magnesium plates), intermetallic compound characteristics, microstructure, fracture surface and strength of joint. The emergence and nature of intermetallic compounds during aluminum/magnesium and aluminum/zinc/magnesium friction stir welded joints were studied in detail. As can be seen from the findings, using zinc in aluminum/magnesium friction stir welded joints inhibits the emergence of brittle aluminum–magnesium intermetallic compounds and promotes the formation of magnesium–zinc intermetallic compounds in the stir zone by introducing the zinc interlayer, confirmed through X-ray diffraction analysis. Furthermore, the average tensile performance (181.33 MPa) of friction stir welded aluminum/zinc/magnesium joints was enhanced up to 18.26 % compared to aluminum/magnesium friction stir welded joints (153.33 MPa). The promising results of this research establish an alternative route with a cost-effective technique to enhance the aluminum/magnesium dissimilar joint strength.
{"title":"Enhancing the tensile performance of Al/Mg alloy dissimilar friction stir welded joints by reducing brittle intermetallic compounds","authors":"Mukesh Kumar, Ashish Das, R. Ballav, Niraj Kumar, Keshav K. Sharma","doi":"10.1515/ijmr-2021-8690","DOIUrl":"https://doi.org/10.1515/ijmr-2021-8690","url":null,"abstract":"Abstract In this current research work, magnesium AZ61 (Advancing Side) and aluminum 6061-T6 (Retreating Side) alloys were joined using the zinc interlayer friction stir welding technique at the optimum process parameters. The aim of this work is to propose an effective alternative to overcome issues related to aluminum/magnesium joints. This article investigates the effects of zinc foil (0.2 mm) on the weld surface (3 mm aluminum/magnesium plates), intermetallic compound characteristics, microstructure, fracture surface and strength of joint. The emergence and nature of intermetallic compounds during aluminum/magnesium and aluminum/zinc/magnesium friction stir welded joints were studied in detail. As can be seen from the findings, using zinc in aluminum/magnesium friction stir welded joints inhibits the emergence of brittle aluminum–magnesium intermetallic compounds and promotes the formation of magnesium–zinc intermetallic compounds in the stir zone by introducing the zinc interlayer, confirmed through X-ray diffraction analysis. Furthermore, the average tensile performance (181.33 MPa) of friction stir welded aluminum/zinc/magnesium joints was enhanced up to 18.26 % compared to aluminum/magnesium friction stir welded joints (153.33 MPa). The promising results of this research establish an alternative route with a cost-effective technique to enhance the aluminum/magnesium dissimilar joint strength.","PeriodicalId":14079,"journal":{"name":"International Journal of Materials Research","volume":"13 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139220222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Vu Viet Linh Nguyen, Thanh-Truc Pham, Nguyen Anh Tuan Huynh, Van Quy Nguyen
Abstract In this study, a nanocomposite film comprising poly(vinyl alcohol) (PVA) and rice husk-derived cellulose nanocrystals (CNC) was introduced as a novel sorbent for removing copper (II) cations. First, CNC was isolated from neat rice husk, and then these particles with many ratios compared to PVA (2, 4, 6, and 10 wt.%) were added to the PVA solution to render the nanocomposite films. The obtained films were evaluated using scanning electron microscopy, Fourier-transform infrared spectroscopy, and water uptake tests. The optimal condition for the sorbent preparation was 10 wt.% of CNCs to PVA. The maximum ion adsorption percentage of the PVA/CNC 10 % film reached 55 % after 3 h exposure to 70 ppm Cu (II) ion solution at 25 °C. This research suggested a facile and feasible fabrication method of a nanocomposite film, considered a potential sorbent for the adsorption of copper (II) ions.
{"title":"Rice husk-based cellulose nanocrystal/poly(vinyl alcohol) composite film for the removal of Cu (II) cation from aqueous solution","authors":"Vu Viet Linh Nguyen, Thanh-Truc Pham, Nguyen Anh Tuan Huynh, Van Quy Nguyen","doi":"10.1515/ijmr-2023-0104","DOIUrl":"https://doi.org/10.1515/ijmr-2023-0104","url":null,"abstract":"Abstract In this study, a nanocomposite film comprising poly(vinyl alcohol) (PVA) and rice husk-derived cellulose nanocrystals (CNC) was introduced as a novel sorbent for removing copper (II) cations. First, CNC was isolated from neat rice husk, and then these particles with many ratios compared to PVA (2, 4, 6, and 10 wt.%) were added to the PVA solution to render the nanocomposite films. The obtained films were evaluated using scanning electron microscopy, Fourier-transform infrared spectroscopy, and water uptake tests. The optimal condition for the sorbent preparation was 10 wt.% of CNCs to PVA. The maximum ion adsorption percentage of the PVA/CNC 10 % film reached 55 % after 3 h exposure to 70 ppm Cu (II) ion solution at 25 °C. This research suggested a facile and feasible fabrication method of a nanocomposite film, considered a potential sorbent for the adsorption of copper (II) ions.","PeriodicalId":14079,"journal":{"name":"International Journal of Materials Research","volume":"49 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139228012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Fiber-reinforced composites have changed additive manufacturing into a sustainable manufacturing paradigm with the capacity to produce items with outstanding mechanical performance. The fused filament fabrication (FFF) process is the latest in advanced digital fabrication techniques used for fabricating polymer material using additive layer deposition. In this study, the results of mechanical and vibration tests were used to examine the impact of process variables such as layer thickness (0.08 mm, 0.25 mm, and 0.64 mm), infill density (20 %, 40 %, 60 %, and 80 %), and infill pattern (rectilinear, triangular, and hexagonal). The novelty of this work is to correlate the contact angle measurement with the mechanical properties of the 3D-printed specimens. The adhesion behaviour of the 3D printed parts is examined by measuring the contact angle from the wettability test. From the findings, it was observed that the infill density and layer pattern play a significant role in the interlayer adhesion, as evident from the contact angle measurement.
摘要 纤维增强复合材料已将增材制造转变为一种可持续的制造模式，能够生产出具有出色机械性能的产品。熔融长丝制造（FFF）工艺是最新的先进数字制造技术，用于利用添加层沉积制造聚合物材料。在这项研究中，机械和振动测试的结果被用来检验工艺变量的影响，如层厚度（0.08 毫米、0.25 毫米和 0.64 毫米）、填充密度（20%、40%、60% 和 80%）和填充模式（直线型、三角形和六角形）。这项工作的创新之处在于将接触角测量与 3D 打印试样的机械性能联系起来。通过测量润湿性测试中的接触角，研究了三维打印部件的粘附性能。研究结果表明，从接触角测量结果可以看出，填充密度和层型在层间附着力方面起着重要作用。
{"title":"Effect of process parameters on mechanical properties and wettability of polylactic acid by fused filament fabrication process","authors":"Vinoth Babu Nagam, V. Narayanan","doi":"10.1515/ijmr-2022-0246","DOIUrl":"https://doi.org/10.1515/ijmr-2022-0246","url":null,"abstract":"Abstract Fiber-reinforced composites have changed additive manufacturing into a sustainable manufacturing paradigm with the capacity to produce items with outstanding mechanical performance. The fused filament fabrication (FFF) process is the latest in advanced digital fabrication techniques used for fabricating polymer material using additive layer deposition. In this study, the results of mechanical and vibration tests were used to examine the impact of process variables such as layer thickness (0.08 mm, 0.25 mm, and 0.64 mm), infill density (20 %, 40 %, 60 %, and 80 %), and infill pattern (rectilinear, triangular, and hexagonal). The novelty of this work is to correlate the contact angle measurement with the mechanical properties of the 3D-printed specimens. The adhesion behaviour of the 3D printed parts is examined by measuring the contact angle from the wettability test. From the findings, it was observed that the infill density and layer pattern play a significant role in the interlayer adhesion, as evident from the contact angle measurement.","PeriodicalId":14079,"journal":{"name":"International Journal of Materials Research","volume":"12 6","pages":"1088 - 1100"},"PeriodicalIF":0.8,"publicationDate":"2023-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139266521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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