Zhangyang Zhou, B. Ma, Xin Zhang, C. Deng, Shujie Yang, Chuanbo Hu
In this study, a combination of hydrothermal and sol-gel methods was used to prepare superhydrophobic polydimethylsiloxane (PDMS)/TiO2 composite coating with good self-cleaning properties and corrosion resistance. The structural, surface roughness and wettability behavior of the PDMS/TiO2 superhydrophobic coatings were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), atomic force microscopy (AFM), and contact angles measurements. Results showed that surfaces of composite coatings possessed rough hierarchical micro/nanostructures, especially, the surface water contact angle is as high as 160° and the sliding angle is less than 2.1° when the ratio of PDMS/TiO2 was 1:5. In addition, through a series of high-temperature exposure, acid-alkali resistance, self-cleaning, and electrochemical corrosion tests, it was also found that the superhydrophobic surface with a PDMS/TiO2 ratio of 1:5 had excellent properties, and showed certain practicability in terms of anticorrosion, antipollution and durability. Therefore, it can be concluded that this kind of corrosion resistant superhydrophobic PDMS/TiO2 composite coating with simple operation, high performance and multi-scale use on metal substrates has good application prospects in harsh environments.
{"title":"Fabrication of superhydrophobic PDMS/TiO2 composite coatings with corrosion resistance","authors":"Zhangyang Zhou, B. Ma, Xin Zhang, C. Deng, Shujie Yang, Chuanbo Hu","doi":"10.1680/jsuin.22.00013","DOIUrl":"https://doi.org/10.1680/jsuin.22.00013","url":null,"abstract":"In this study, a combination of hydrothermal and sol-gel methods was used to prepare superhydrophobic polydimethylsiloxane (PDMS)/TiO2 composite coating with good self-cleaning properties and corrosion resistance. The structural, surface roughness and wettability behavior of the PDMS/TiO2 superhydrophobic coatings were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), atomic force microscopy (AFM), and contact angles measurements. Results showed that surfaces of composite coatings possessed rough hierarchical micro/nanostructures, especially, the surface water contact angle is as high as 160° and the sliding angle is less than 2.1° when the ratio of PDMS/TiO2 was 1:5. In addition, through a series of high-temperature exposure, acid-alkali resistance, self-cleaning, and electrochemical corrosion tests, it was also found that the superhydrophobic surface with a PDMS/TiO2 ratio of 1:5 had excellent properties, and showed certain practicability in terms of anticorrosion, antipollution and durability. Therefore, it can be concluded that this kind of corrosion resistant superhydrophobic PDMS/TiO2 composite coating with simple operation, high performance and multi-scale use on metal substrates has good application prospects in harsh environments.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2022-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47994653","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}
Herein, we are interested to provide the synthetic methodologies, chemical properties, and the corrosion performance of some Ni-xCo-yTiO2 nanocomposite electroplated on Cu using the gluconate-cysteine bath, pointing at the classification of these materials corresponding to their stability in that simulated marine solution and recommend using these materials in such aggressive media. Electrochemical and spectroscopic measurements were employed in 3.5 wt. % NaCl electrolytes at 25°C. The electrochemical properties of the applicable nanocomposite material will be studied to enhance manufacturing technology and forecast the stability of structures made from it. The produced nanocomposite coatings have been demonstrated to have high corrosion resistance in the investigated electrolyte, which is commonly utilized in hydrogen evolution reaction applications and other novel materials corrosion investigations. By characterizing the corrosion performance of the examined Ni-xCo-yTiO2 nanocomposite coatings in 3.5 wt.% NaCl solution, the Ni-48Co-3.8TiO2 is regarded as the most stable electrode. The results exposed that the inclusion of Co inside Ni-xCo-yTiO2 significantly lessened the corrosion rate of the investigated composites. The surface examination revealed the presence of several materials constituents in the passive layer. DFT and Monte Carlo simulation approaches have been used to investigate and analyze the relationship between molecular structure and inhibitory effect.
{"title":"Anticorrosion and surface evaluation of some electrodeposited Ni-Co-TiO2 nanocomposite coatings in 3.5 wt. % NaCl solutions","authors":"H. Nady, M. Negem, E. E. El-Katori","doi":"10.1680/jsuin.22.00017","DOIUrl":"https://doi.org/10.1680/jsuin.22.00017","url":null,"abstract":"Herein, we are interested to provide the synthetic methodologies, chemical properties, and the corrosion performance of some Ni-xCo-yTiO2 nanocomposite electroplated on Cu using the gluconate-cysteine bath, pointing at the classification of these materials corresponding to their stability in that simulated marine solution and recommend using these materials in such aggressive media. Electrochemical and spectroscopic measurements were employed in 3.5 wt. % NaCl electrolytes at 25°C. The electrochemical properties of the applicable nanocomposite material will be studied to enhance manufacturing technology and forecast the stability of structures made from it. The produced nanocomposite coatings have been demonstrated to have high corrosion resistance in the investigated electrolyte, which is commonly utilized in hydrogen evolution reaction applications and other novel materials corrosion investigations. By characterizing the corrosion performance of the examined Ni-xCo-yTiO2 nanocomposite coatings in 3.5 wt.% NaCl solution, the Ni-48Co-3.8TiO2 is regarded as the most stable electrode. The results exposed that the inclusion of Co inside Ni-xCo-yTiO2 significantly lessened the corrosion rate of the investigated composites. The surface examination revealed the presence of several materials constituents in the passive layer. DFT and Monte Carlo simulation approaches have been used to investigate and analyze the relationship between molecular structure and inhibitory effect.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2022-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45099154","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}
R. Pavlov, F. Valeeva, G. Gaynanova, D. Kuznetsov, L. Zakharova
Mono-, di-, triethanolamine in a combination with methylmorpholinium and hydroxyethylmorpholinium surfactants were investigated for their aggregation and solubilizing properties. A cooperative behavior of the solubilization by mixed surfactant – ethanolamine systems is described. Ethanolamines strongly affect pH and lead to Orange OT phenolic group deprotonation and subsequent increase in aqueous/micellar solubility. The morpholinium surfactant micelles reduce pKa of Orange OT phenolic group, enabling its deprotonation at the earlier stages of media alkalinization. Obtained surfactant – ethanolamine mixtures can solubilize very large amounts of hydrophobic dye, which can then be triggered to precipitate via acidification.
{"title":"Aggregation of morpholinium surfactants with amino alcohols as additives: a close look","authors":"R. Pavlov, F. Valeeva, G. Gaynanova, D. Kuznetsov, L. Zakharova","doi":"10.1680/jsuin.22.00006","DOIUrl":"https://doi.org/10.1680/jsuin.22.00006","url":null,"abstract":"Mono-, di-, triethanolamine in a combination with methylmorpholinium and hydroxyethylmorpholinium surfactants were investigated for their aggregation and solubilizing properties. A cooperative behavior of the solubilization by mixed surfactant – ethanolamine systems is described. Ethanolamines strongly affect pH and lead to Orange OT phenolic group deprotonation and subsequent increase in aqueous/micellar solubility. The morpholinium surfactant micelles reduce pKa of Orange OT phenolic group, enabling its deprotonation at the earlier stages of media alkalinization. Obtained surfactant – ethanolamine mixtures can solubilize very large amounts of hydrophobic dye, which can then be triggered to precipitate via acidification.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2022-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45619406","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}
Cu-based materials have been extensively studied for nitrate removal as an inexpensive and abundant electrocatalyst for water purification via the nitrate reduction reaction (NO3RR). But it typically suffers from nitrite accumulation due to the high selectivity towards nitrite formation. To address this issue, we herein report a strategy of modifying Cu nanowires with Ni nanoparticles to improve the NO3RR performance. The Ni nanoparticles both facilitate electron transfer from Ni to Cu and enhance the conversion of nitrite, thereby improving the overall removal of nitrate with a minimal yield of nitrite. Through a facile liquid phase deposition process, the loading amount of Ni nanoparticles can be easily tailored by simply changing the concentration of precursors, and the best Cu/Ni molar ratio for nitrate removal performance is 20. Under this ratio, the material simultaneously delivers a high nitrate removal rate of 92.2% and a low nitrite selectivity of only 2.2% at –0.9 V vs. reversible hydrogen electrode, accompanied with superior stability for a continuous NO3RR. This study thus offers an efficient, stable, and low-cost Cu-Ni bimetallic catalyst for NO3RR.
{"title":"Ni nanoparticles modified Cu nanowires for enhanced electrocatalytic nitrate removal","authors":"Yiyang Feng, Xiaoqing Liu, Zhehan Yi, Haotian Tan, Liqun Wang, Feng Hou, Ji Liang","doi":"10.1680/jsuin.22.00040","DOIUrl":"https://doi.org/10.1680/jsuin.22.00040","url":null,"abstract":"Cu-based materials have been extensively studied for nitrate removal as an inexpensive and abundant electrocatalyst for water purification via the nitrate reduction reaction (NO3RR). But it typically suffers from nitrite accumulation due to the high selectivity towards nitrite formation. To address this issue, we herein report a strategy of modifying Cu nanowires with Ni nanoparticles to improve the NO3RR performance. The Ni nanoparticles both facilitate electron transfer from Ni to Cu and enhance the conversion of nitrite, thereby improving the overall removal of nitrate with a minimal yield of nitrite. Through a facile liquid phase deposition process, the loading amount of Ni nanoparticles can be easily tailored by simply changing the concentration of precursors, and the best Cu/Ni molar ratio for nitrate removal performance is 20. Under this ratio, the material simultaneously delivers a high nitrate removal rate of 92.2% and a low nitrite selectivity of only 2.2% at –0.9 V vs. reversible hydrogen electrode, accompanied with superior stability for a continuous NO3RR. This study thus offers an efficient, stable, and low-cost Cu-Ni bimetallic catalyst for NO3RR.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2022-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49160871","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}
Polymer nanocomposite films combining of polyaniline (PANI) and lead sulfide (PbSNPs) were effectively synthesized using a casting solution approach for used in optical energy applications. Transmission microscope (TEM), X-ray diffraction (XRD), and infra-red spectroscopy (FT-IR) methods demonstrate that PbSNPs is successfully introduced into the PANI matrix. Scanning electron microscope (SEM) images reveal that the PbS is homogenously loaded and distributed in PANI chain. Using UV-Vis optical absorbance, the optical parameters of PANI/PbSNPs were evaluated, including absorption edge (Ed), band gap (Eg), carbon cluster number (N) and Urbach energies (Eu). PbSNPs has been investigated for their impact on PANI polymer linear optical (LO) as well as nonlinear optical (NLO) characteristics including refractive index, nonlinear susceptibility, and dielectric parameter’s. When comparing the PANI/PbSNPs film to the pure PANI film, the band gap of the PANI/PbSNPs samples was found to be significantly reduced. However, the addition of PbSNPs increased the predicted amount of optical conductivity and carbon cluster number. The addition of PbSNPs to the PANI polymer improved its optical characteristics, resulting in a synthetic composite that can be used in energy applications as well as optoelectronics devices.
{"title":"Characterization and linear/nonlinear optical properties of polymer nanocomposite films for optoelectronics applications","authors":"B. M. Alotaibi, H. Al-Yousef, N. Alsaif, A. Atta","doi":"10.1680/jsuin.22.00026","DOIUrl":"https://doi.org/10.1680/jsuin.22.00026","url":null,"abstract":"Polymer nanocomposite films combining of polyaniline (PANI) and lead sulfide (PbSNPs) were effectively synthesized using a casting solution approach for used in optical energy applications. Transmission microscope (TEM), X-ray diffraction (XRD), and infra-red spectroscopy (FT-IR) methods demonstrate that PbSNPs is successfully introduced into the PANI matrix. Scanning electron microscope (SEM) images reveal that the PbS is homogenously loaded and distributed in PANI chain. Using UV-Vis optical absorbance, the optical parameters of PANI/PbSNPs were evaluated, including absorption edge (Ed), band gap (Eg), carbon cluster number (N) and Urbach energies (Eu). PbSNPs has been investigated for their impact on PANI polymer linear optical (LO) as well as nonlinear optical (NLO) characteristics including refractive index, nonlinear susceptibility, and dielectric parameter’s. When comparing the PANI/PbSNPs film to the pure PANI film, the band gap of the PANI/PbSNPs samples was found to be significantly reduced. However, the addition of PbSNPs increased the predicted amount of optical conductivity and carbon cluster number. The addition of PbSNPs to the PANI polymer improved its optical characteristics, resulting in a synthetic composite that can be used in energy applications as well as optoelectronics devices.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43621955","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}
Lightweight electromagnetic interference (EMI) shielding materials under harsh environments are in urgent need to tackle the increasing electromagnetic pollution and hazards. Herein, carbon nanofiber aerogel (CNFA) modified silicon oxycarbide (CNFA/SiOC) composites were prepared following a precursor infiltration pyrolysis procedure by using three-dimensional CNFA as a skeleton. Their structures and mass densities (0.28-1.35 g cm−3) were tunable by adjusting the content of polysiloxane precursor in impregnating solution. The lightweight CNFA/SiOC composite featured with continuous conductive network and highly porous structure in SiOC matrix, resulting in high specific shielding effectiveness (up to 68.9 dB·cm3 g−1 with SETotal of 19.3 dB) due to enhanced conductance loss and multi reflection/scattering. When increasing the density, the CNFA/SiOC composite can deliver EMI shielding effectiveness as high as 27.5 dB due to the generation of defective carbon and carbon dangling bonds as well as abundant interfaces between CNFs and SiOC which induce polarization loss. Moreover, the CNFA/SiOC composite exhibits good oxidation resistance with SETotal retention of above 98% after heat treatment at 600°C for 2 h in air, which arises from the effective protection of CNFs by SiOC.
恶劣环境下的轻质电磁干扰（EMI）屏蔽材料迫切需要解决日益严重的电磁污染和危害。本文以碳纳米纤维气凝胶（CNFA）为骨架，采用前驱体渗透热解工艺制备了碳纳米纤维-气凝胶改性碳氧化硅（CNFA/SiOC）复合材料。它们的结构和质量密度（0.28-1.35 g cm−3）可通过调节浸渍溶液中聚硅氧烷前体的含量来调节。轻质CNFA/SiOC复合材料具有连续的导电网络和SiOC基体中的高度多孔结构，具有较高的比屏蔽效率（高达68.9 dB·cm3 g−1，SETotal为19.3 dB）。当增加密度时，CNFA/SiOC复合材料可以提供高达27.5的EMI屏蔽效果 dB，这是由于产生有缺陷的碳和碳悬空键以及CNFs和SiOC之间的丰富界面导致的极化损耗。此外，CNFA/SiOC复合材料表现出良好的抗氧化性，在600°C下热处理2小时后，总保持率超过98% h，这源于SiOC对CNFs的有效保护。
{"title":"Carbon nanofiber aerogel/silicon oxycarbide composites for enhanced electromagnetic interference shielding","authors":"Wenxia Zhu, Zhengkai Tian, Xiao-xia Yan, Dong Su","doi":"10.1680/jsuin.22.00001","DOIUrl":"https://doi.org/10.1680/jsuin.22.00001","url":null,"abstract":"Lightweight electromagnetic interference (EMI) shielding materials under harsh environments are in urgent need to tackle the increasing electromagnetic pollution and hazards. Herein, carbon nanofiber aerogel (CNFA) modified silicon oxycarbide (CNFA/SiOC) composites were prepared following a precursor infiltration pyrolysis procedure by using three-dimensional CNFA as a skeleton. Their structures and mass densities (0.28-1.35 g cm−3) were tunable by adjusting the content of polysiloxane precursor in impregnating solution. The lightweight CNFA/SiOC composite featured with continuous conductive network and highly porous structure in SiOC matrix, resulting in high specific shielding effectiveness (up to 68.9 dB·cm3 g−1 with SETotal of 19.3 dB) due to enhanced conductance loss and multi reflection/scattering. When increasing the density, the CNFA/SiOC composite can deliver EMI shielding effectiveness as high as 27.5 dB due to the generation of defective carbon and carbon dangling bonds as well as abundant interfaces between CNFs and SiOC which induce polarization loss. Moreover, the CNFA/SiOC composite exhibits good oxidation resistance with SETotal retention of above 98% after heat treatment at 600°C for 2 h in air, which arises from the effective protection of CNFs by SiOC.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46429545","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}
Yuan Gao, Miaowen Jiang, L. Bao, Zhichen Yin, Jicheng Zhang, Guangzhen Pan, Shiqiang Zheng, Yufeng Zheng, Chuanjie Wu, Ming Li, Xu Ji
Clinical practice of therapeutic hypothermia for neuroprotection in acute cerebral ischemia has been hindered by warming effect on the cold infusate along pathway, which results from the poor thermal resistance of traditional interventional catheter. In this study, thermal insulation coatings with different spray parameters and coating suspension compositions were prepared via air-spraying on Nylon substrate for biomedical application. The surface morphology and microstructure of coatings were investigated by scanning electron microscope (SEM), X-ray diffraction (XRD), Fourier Transform infrared spectroscopy (FTIR), respectively. Silk fibroin (SF) and hollow silica based nanospheres (HSBNS) were successfully sprayed on Nylon substrate. The thermal conductivity of coating measured by light flash apparatus is down to 0.00105 W/(m·K). The tape test indicates that coatings containing SF, HSBNS and glyceryl have good adhesion which is a promising method to enhance the thermal insulation performance of traditional catheter for cerebral hypothermia therapy.
{"title":"Preparation and characterization of air sprayed silk fibroin/silica-based thermal-insulation coatings on catheters for cerebral hypothermia therapy","authors":"Yuan Gao, Miaowen Jiang, L. Bao, Zhichen Yin, Jicheng Zhang, Guangzhen Pan, Shiqiang Zheng, Yufeng Zheng, Chuanjie Wu, Ming Li, Xu Ji","doi":"10.1680/jsuin.22.00022","DOIUrl":"https://doi.org/10.1680/jsuin.22.00022","url":null,"abstract":"Clinical practice of therapeutic hypothermia for neuroprotection in acute cerebral ischemia has been hindered by warming effect on the cold infusate along pathway, which results from the poor thermal resistance of traditional interventional catheter. In this study, thermal insulation coatings with different spray parameters and coating suspension compositions were prepared via air-spraying on Nylon substrate for biomedical application. The surface morphology and microstructure of coatings were investigated by scanning electron microscope (SEM), X-ray diffraction (XRD), Fourier Transform infrared spectroscopy (FTIR), respectively. Silk fibroin (SF) and hollow silica based nanospheres (HSBNS) were successfully sprayed on Nylon substrate. The thermal conductivity of coating measured by light flash apparatus is down to 0.00105 W/(m·K). The tape test indicates that coatings containing SF, HSBNS and glyceryl have good adhesion which is a promising method to enhance the thermal insulation performance of traditional catheter for cerebral hypothermia therapy.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44956847","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}
Thin layer wicking experiments were carried out using a magnetically treated water and non-treated one. Two types of magnets of different construction and strength of the magnetic field (B=15 mT and B=0.27 T) were used. It was found that water circulated in the presence of magnetic field penetrated faster into the porous layer of silica gel. This is reflected also in the changes of electron donor and electron acceptor parameters of the surface free energy of the silica gel as calculated from the van Oss et al. approach. Based on this finding it is hypothesized that changes in the water structure occurs, i.e. the water flow destroys somehow the network of hydrogen bonds in liquid water while the magnetic field action promotes its formation.
{"title":"Thin layer wicking experiments using magnetically treated water","authors":"A. Szcześ, E. Chibowski, E. Rzeźnik","doi":"10.1680/jsuin.22.00999","DOIUrl":"https://doi.org/10.1680/jsuin.22.00999","url":null,"abstract":"Thin layer wicking experiments were carried out using a magnetically treated water and non-treated one. Two types of magnets of different construction and strength of the magnetic field (B=15 mT and B=0.27 T) were used. It was found that water circulated in the presence of magnetic field penetrated faster into the porous layer of silica gel. This is reflected also in the changes of electron donor and electron acceptor parameters of the surface free energy of the silica gel as calculated from the van Oss et al. approach. Based on this finding it is hypothesized that changes in the water structure occurs, i.e. the water flow destroys somehow the network of hydrogen bonds in liquid water while the magnetic field action promotes its formation.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42560056","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}
Friction and wear are very common phenomena found virtually everywhere. However, it is very difficult to predict the tribological (i.e., related to friction and wear) structure-properties relationships from the fundamental physical principles. Consequently, tribology remains a data-driven, mostly empirical discipline. With the advent of new Machine Learning (ML) and Artificial Intelligence (AI) methods, it becomes possible to establish new correlations in tribological data to better predict and control the tribological behavior of novel materials. Hence the new area of triboinformatics has emerged combining tribology with Data Science. We review ML algorithms used to establish correlations between the structure of metallic alloys and composite materials, tribological test conditions, friction, and wear. We also discuss novel methods of surface roughness analysis involving the concept of data topology in multi-dimensional data space, as applied to the macro- and nanoscale roughness. Other triboinformatic approaches are considered as well.
{"title":"Triboinformatics: Machine Learning algorithms and Data Topology methods for surface roughness, friction, and wear","authors":"Md Syam Hasan, Michael Nosonovsky","doi":"10.1680/jsuin.22.00027","DOIUrl":"https://doi.org/10.1680/jsuin.22.00027","url":null,"abstract":"Friction and wear are very common phenomena found virtually everywhere. However, it is very difficult to predict the tribological (i.e., related to friction and wear) structure-properties relationships from the fundamental physical principles. Consequently, tribology remains a data-driven, mostly empirical discipline. With the advent of new Machine Learning (ML) and Artificial Intelligence (AI) methods, it becomes possible to establish new correlations in tribological data to better predict and control the tribological behavior of novel materials. Hence the new area of triboinformatics has emerged combining tribology with Data Science. We review ML algorithms used to establish correlations between the structure of metallic alloys and composite materials, tribological test conditions, friction, and wear. We also discuss novel methods of surface roughness analysis involving the concept of data topology in multi-dimensional data space, as applied to the macro- and nanoscale roughness. Other triboinformatic approaches are considered as well.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2022-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43958445","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. Rusinov, Z. Blednova, R. Plomodyalo, A. P. Yurkova, Anastasia A Rusinova, Maxim D Ignatiev, Maxim Semadeni
The authors developed technology for obtaining surface composite materials. This technology includes high-energy mechanical treatment, HVOF in a protective atmosphere, subsequent thermomechanical and thermal treatment of ZrCuNiCoTi, cBNNi3AlSiCCoY layers in a protective atmosphere. The processing allowed to increase the adhesive strength of the surface composites, reduce their porosity and improve their functional and operational properties. Staged methods of heat treatment and plastic deformation of surface layers have been developed. These methods stabilize material structure while reducing residual stresses. On the basis of complex X-ray diffraction and electron microscopic studies, the structural parameters of surface composites were determined. It was shown that the ZrCuNiCoTi alloy is in the austenitic-martensitic state and has a nanocrystalline structure with a grain size of 80–120 nm. Meanwhile, the cBNNi3AlSiCCoY alloy consists of many intermetallic phases and inclusions and has a nanosized structure with a grain size of 100–200 nm. A microhardness study of the surface layers in ZrCuNiCoTi – cBNNi3AlSiCCoY composite showed that thermomechanical treatment increases microhardness. The experimental data were statistically processed. As a result, empirical mathematical dependences of the stress amplitude on cyclic durability were compiled. Mechanical tests included tests of NiCoTiZrHf – cBNCoMo, ZrCuNiCoTi – cBNNi3AlSiCCoY, TiNiZrHfCoCu – cBNCoNiAlY composites for multi-cycle fatigue during bending with rotation.
{"title":"Functionally oriented high-temperature composite materials for aerospace use","authors":"P. Rusinov, Z. Blednova, R. Plomodyalo, A. P. Yurkova, Anastasia A Rusinova, Maxim D Ignatiev, Maxim Semadeni","doi":"10.1680/jsuin.22.00016","DOIUrl":"https://doi.org/10.1680/jsuin.22.00016","url":null,"abstract":"The authors developed technology for obtaining surface composite materials. This technology includes high-energy mechanical treatment, HVOF in a protective atmosphere, subsequent thermomechanical and thermal treatment of ZrCuNiCoTi, cBNNi3AlSiCCoY layers in a protective atmosphere. The processing allowed to increase the adhesive strength of the surface composites, reduce their porosity and improve their functional and operational properties. Staged methods of heat treatment and plastic deformation of surface layers have been developed. These methods stabilize material structure while reducing residual stresses. On the basis of complex X-ray diffraction and electron microscopic studies, the structural parameters of surface composites were determined. It was shown that the ZrCuNiCoTi alloy is in the austenitic-martensitic state and has a nanocrystalline structure with a grain size of 80–120 nm. Meanwhile, the cBNNi3AlSiCCoY alloy consists of many intermetallic phases and inclusions and has a nanosized structure with a grain size of 100–200 nm. A microhardness study of the surface layers in ZrCuNiCoTi – cBNNi3AlSiCCoY composite showed that thermomechanical treatment increases microhardness. The experimental data were statistically processed. As a result, empirical mathematical dependences of the stress amplitude on cyclic durability were compiled. Mechanical tests included tests of NiCoTiZrHf – cBNCoMo, ZrCuNiCoTi – cBNNi3AlSiCCoY, TiNiZrHfCoCu – cBNCoNiAlY composites for multi-cycle fatigue during bending with rotation.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2022-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41983406","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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