Pub Date : 2023-01-01DOI: 10.1615/hightempmatproc.v27.i4.40
V. Elinson, P. Shchur, E. Rusanova, V.V. Shchelkova
This paper analyzes the results of studying the antimicrobial properties of nanostructured fluorocarbon films deposited on polymers by ion-plasma technology. For the first time, the dependence of the surface charge and antimicrobial properties over time was established. As the negative charge drains, the number of colonies of the studied bacteria and fungi increases. Fluorocarbon films were formed using a two-component gas mixture (CF4 + C6H12) with different ratios of components. Antimicrobial activity on fluorocarbon coatings is maintained for 12 months.
{"title":"ANTIADHESION FLUOROCARBON COATINGS WITH INDUCED SURFACE CHARGE FOR PROTECTION AGAINST BIODEGRADATION","authors":"V. Elinson, P. Shchur, E. Rusanova, V.V. Shchelkova","doi":"10.1615/hightempmatproc.v27.i4.40","DOIUrl":"https://doi.org/10.1615/hightempmatproc.v27.i4.40","url":null,"abstract":"This paper analyzes the results of studying the antimicrobial properties of nanostructured fluorocarbon films deposited on polymers by ion-plasma technology. For the first time, the dependence of the surface charge and antimicrobial properties over time was established. As the negative charge drains, the number of colonies of the studied bacteria and fungi increases. Fluorocarbon films were formed using a two-component gas mixture (CF4 + C6H12) with different ratios of components. Antimicrobial activity on fluorocarbon coatings is maintained for 12 months.","PeriodicalId":12966,"journal":{"name":"High Temperature Materials and Processes","volume":"11 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86659975","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}
Pub Date : 2023-01-01DOI: 10.1615/hightempmatproc.2023045568
Daniel Nmadu, U. Uma, A. Parshuto, N. Eli-Chukwu, Elena Stepanova Parshuto, I. Smyaglikov
{"title":"FORMATION OF WEAR-RESISTANT ANODIC OXIDE FILMS ON SILICON ALUMINUM ALLOY FOR ELECTRICAL AND ELECTRONIC MATERIALS","authors":"Daniel Nmadu, U. Uma, A. Parshuto, N. Eli-Chukwu, Elena Stepanova Parshuto, I. Smyaglikov","doi":"10.1615/hightempmatproc.2023045568","DOIUrl":"https://doi.org/10.1615/hightempmatproc.2023045568","url":null,"abstract":"","PeriodicalId":12966,"journal":{"name":"High Temperature Materials and Processes","volume":"210 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80605870","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}
Pub Date : 2023-01-01DOI: 10.1615/hightempmatproc.2023048357
A. Leshchik, Andrey R. Ocheredko, S. Kudryashov, A. Ryabov, T. Petrenko
{"title":"Effect of reactor wall temperature on benzene oxidation in a barrier discharge","authors":"A. Leshchik, Andrey R. Ocheredko, S. Kudryashov, A. Ryabov, T. Petrenko","doi":"10.1615/hightempmatproc.2023048357","DOIUrl":"https://doi.org/10.1615/hightempmatproc.2023048357","url":null,"abstract":"","PeriodicalId":12966,"journal":{"name":"High Temperature Materials and Processes","volume":"4 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88680081","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}
Pub Date : 2023-01-01DOI: 10.1615/hightempmatproc.2023048181
M. A. Hendrawan, K. A. Ilman, Takahiro Kunimine
{"title":"EFFECTS OF HOLDING TIME ON MICROSTRUCTURE AND SHEAR STRENGTH OF RESISTANCE SPOT-WELDED JOINTS BETWEEN MILD STEEL AND ALUMINUM WITH ZINC POWDER FILLER","authors":"M. A. Hendrawan, K. A. Ilman, Takahiro Kunimine","doi":"10.1615/hightempmatproc.2023048181","DOIUrl":"https://doi.org/10.1615/hightempmatproc.2023048181","url":null,"abstract":"","PeriodicalId":12966,"journal":{"name":"High Temperature Materials and Processes","volume":"6 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87673776","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 High-strength rebar plays a supporting role in large engineering structures due to its excellent performance. In this study, the effect of different isothermal time treatments (30, 60, 100, and 200 s) at 650°C on the microstructure transformation and mechanical properties of rebars was investigated. The hot-rolling process was simulated by Gleeble-3800 thermal simulator. The microstructure, precipitates, and mechanical properties of high-strength rebar were characterized by scanning electron microscopy, transmission electron microscopy (TEM), and a universal tensile test machine. Results show that when the isothermal time increased from 30 to 200 s, the ferrite grain size decreased from 10.632 to 8.326 μm, and the pearlite lamellar spacing was refined from 0.230 to 0.142 μm. The TEM confirmed that when the isothermal time increased from 30 to 200 s, the nanoscale (Nb, V, and Ti) C precipitates were uniformly distributed in the ferrite matrix and grain boundary, and the size of precipitates decreased from 34.014 to 29.916 nm; thus, the tensile strength increased from 752.477 to 780.713 MPa, and the yield strength increased from 574.714 to 621.434 MPa.
{"title":"Effect of different isothermal times on the microstructure and mechanical properties of high-strength rebar","authors":"Tianyou Wang, Zhiying Li, Jie Wang, Changrong Li, Zeyun Zeng, Fulong Wei","doi":"10.1515/htmp-2022-0266","DOIUrl":"https://doi.org/10.1515/htmp-2022-0266","url":null,"abstract":"Abstract High-strength rebar plays a supporting role in large engineering structures due to its excellent performance. In this study, the effect of different isothermal time treatments (30, 60, 100, and 200 s) at 650°C on the microstructure transformation and mechanical properties of rebars was investigated. The hot-rolling process was simulated by Gleeble-3800 thermal simulator. The microstructure, precipitates, and mechanical properties of high-strength rebar were characterized by scanning electron microscopy, transmission electron microscopy (TEM), and a universal tensile test machine. Results show that when the isothermal time increased from 30 to 200 s, the ferrite grain size decreased from 10.632 to 8.326 μm, and the pearlite lamellar spacing was refined from 0.230 to 0.142 μm. The TEM confirmed that when the isothermal time increased from 30 to 200 s, the nanoscale (Nb, V, and Ti) C precipitates were uniformly distributed in the ferrite matrix and grain boundary, and the size of precipitates decreased from 34.014 to 29.916 nm; thus, the tensile strength increased from 752.477 to 780.713 MPa, and the yield strength increased from 574.714 to 621.434 MPa.","PeriodicalId":12966,"journal":{"name":"High Temperature Materials and Processes","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46492352","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}
M. Zhu, Xin Zhang, Chunlin Huang, Jin-Tao Lu, Huihui Zhang, Yimeng Ma, Mingjing Wang
Abstract High-temperature coal ash/flue gas corrosion behaviours of three nickel–iron based superalloys for boiler tubes with different Mo and W contents (1.8% Mo + 1.2% W for S1 alloy, 0.8% Mo + 0.2% W for S2 alloy, and 0.5% Mo + 2.2% W for S3 alloy) at 650 and 700°C were studied. The microstructure, phase compositions, and morphologies together with element distribution for corrosion products were investigated with a metallographic microscope, a scanning electron microscope equipped with an energy-dispersive spectroscope, and X-ray diffractometer. The results show that the corrosion resistance of the Ni–Fe-based alloy decreases with the increasing total content of Mo and W in the alloy at both 650 and 700°C; the outer layer of the corrosion products was mainly composed of FeCr2O4 while the inner layer was mainly composed of Cr2O3. Peeling of the oxide films formed on the surfaces of S1 and S3 alloys was observed but no obvious spalling was observed for the S2 alloy. The reactions among Mo, W, and S in the coal ash/flue gas increased the internal stress in the oxide scale, which would cause the failure of the oxide scale. Graphical Abstract High-temperature corrosion behaviours of three nickel–iron-based superalloys for boiler tubes with different Mo and W contents in simulated coal ash/flue gas at 650 and 700°C were studied. The corrosion resistance of the Ni–Fe-based alloy decreases with the increasing total contents of Mo and W in the alloy at both 650 and 700°C; peeling of the oxide films formed on the surfaces of S1 and S3 alloys was observed but no obvious spalling was observed for the S2 alloy. Reactions between Mo, W, and S in the coal ash/flue gas increased the internal stress in the oxide scale, which would cause the failure of the oxide scale.
{"title":"High-temperature corrosion behaviours of nickel–iron-based alloys with different molybdenum and tungsten contents in a coal ash/flue gas environment","authors":"M. Zhu, Xin Zhang, Chunlin Huang, Jin-Tao Lu, Huihui Zhang, Yimeng Ma, Mingjing Wang","doi":"10.1515/htmp-2022-0275","DOIUrl":"https://doi.org/10.1515/htmp-2022-0275","url":null,"abstract":"Abstract High-temperature coal ash/flue gas corrosion behaviours of three nickel–iron based superalloys for boiler tubes with different Mo and W contents (1.8% Mo + 1.2% W for S1 alloy, 0.8% Mo + 0.2% W for S2 alloy, and 0.5% Mo + 2.2% W for S3 alloy) at 650 and 700°C were studied. The microstructure, phase compositions, and morphologies together with element distribution for corrosion products were investigated with a metallographic microscope, a scanning electron microscope equipped with an energy-dispersive spectroscope, and X-ray diffractometer. The results show that the corrosion resistance of the Ni–Fe-based alloy decreases with the increasing total content of Mo and W in the alloy at both 650 and 700°C; the outer layer of the corrosion products was mainly composed of FeCr2O4 while the inner layer was mainly composed of Cr2O3. Peeling of the oxide films formed on the surfaces of S1 and S3 alloys was observed but no obvious spalling was observed for the S2 alloy. The reactions among Mo, W, and S in the coal ash/flue gas increased the internal stress in the oxide scale, which would cause the failure of the oxide scale. Graphical Abstract High-temperature corrosion behaviours of three nickel–iron-based superalloys for boiler tubes with different Mo and W contents in simulated coal ash/flue gas at 650 and 700°C were studied. The corrosion resistance of the Ni–Fe-based alloy decreases with the increasing total contents of Mo and W in the alloy at both 650 and 700°C; peeling of the oxide films formed on the surfaces of S1 and S3 alloys was observed but no obvious spalling was observed for the S2 alloy. Reactions between Mo, W, and S in the coal ash/flue gas increased the internal stress in the oxide scale, which would cause the failure of the oxide scale.","PeriodicalId":12966,"journal":{"name":"High Temperature Materials and Processes","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44036628","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}
Pub Date : 2023-01-01DOI: 10.1615/hightempmatproc.2023047765
L. Novikov, S. Pavlov, E. Dzlieva, Sergey Tarasov, D. Yanitsin, V. Karasev
{"title":"THRESHOLD EFFECT IN DUSTY CLUSTERS IN A MAGNETIC FIELD","authors":"L. Novikov, S. Pavlov, E. Dzlieva, Sergey Tarasov, D. Yanitsin, V. Karasev","doi":"10.1615/hightempmatproc.2023047765","DOIUrl":"https://doi.org/10.1615/hightempmatproc.2023047765","url":null,"abstract":"","PeriodicalId":12966,"journal":{"name":"High Temperature Materials and Processes","volume":"141 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81368939","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}
Pub Date : 2023-01-01DOI: 10.1615/hightempmatproc.2023047747
A. Tyunkov, A. Andronov, E. Oks, Y. Yushkov, D. Zolotukhin
{"title":"Contribution of thermal dissociation during steel nitriding in electron beam plasma","authors":"A. Tyunkov, A. Andronov, E. Oks, Y. Yushkov, D. Zolotukhin","doi":"10.1615/hightempmatproc.2023047747","DOIUrl":"https://doi.org/10.1615/hightempmatproc.2023047747","url":null,"abstract":"","PeriodicalId":12966,"journal":{"name":"High Temperature Materials and Processes","volume":"11 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81595008","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}
Pub Date : 2023-01-01DOI: 10.1615/hightempmatproc.v27.i4.30
M. Kharkov, G.S. Lomonosov, D. Kolodko, M. Kukushkina, A. Kaziev, A. Tumarkin, O. Ogorodnikova
The electrical parameters of a high-power impulse magnetron sputtering (HiPIMS) discharge operating in H2/He mixtures were studied using different values of the pulse width, repetition frequency, and power. Deposition of tungsten (W) coatings was carried out in a magnetron discharge with a thermally insulated W target in two regimes at different pulse widths (80 and 500 µs) and frequencies (2 and 0.5 kHz). The average discharge power was fixed at Pd = 1500 W. Fusion-relevant molecular deuterium/helium (He) and hydrogen/He gas mixtures with a 90/10 flow ratio were used in the experiments.
{"title":"MAGNETRON SPUTTER DEPOSITION OF TUNGSTEN COATINGS IN DEUTERIUM-HELIUM MIXTURES","authors":"M. Kharkov, G.S. Lomonosov, D. Kolodko, M. Kukushkina, A. Kaziev, A. Tumarkin, O. Ogorodnikova","doi":"10.1615/hightempmatproc.v27.i4.30","DOIUrl":"https://doi.org/10.1615/hightempmatproc.v27.i4.30","url":null,"abstract":"The electrical parameters of a high-power impulse magnetron sputtering (HiPIMS) discharge operating in H2/He mixtures were studied using different values of the pulse width, repetition frequency, and power. Deposition of tungsten (W) coatings was carried out in a magnetron discharge with a thermally insulated W target in two regimes at different pulse widths (80 and 500 µs) and frequencies (2 and 0.5 kHz). The average discharge power was fixed at Pd = 1500 W. Fusion-relevant molecular deuterium/helium (He) and hydrogen/He gas mixtures with a 90/10 flow ratio were used in the experiments.","PeriodicalId":12966,"journal":{"name":"High Temperature Materials and Processes","volume":"382 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76765785","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}
Kirthika Ramasamy, C. Murugesan, Senthilkumar Thamilkolunthu
Abstract In this article, an attempt was made to improve the efficiency of coated solar panels by using artificial neural networks (ANNs) and response surface methodology (RSM). Using the spray coating technique, the glass surface of the photovoltaic solar panel was coated with silicon dioxide nanoparticles incorporated with polytetrafluoroethylene-modified silica sols. Multilayer perceptron with feed-forward back-propagation algorithm was used to develop ANN models for improving the efficiency of the coated solar panels. Out of the 200 sets of data collected, 75% were used for training and 25% were used for testing. On evaluating the models using performance indicators, a four-input technological parameter model (silicon dioxide nanoparticle quantity, coating thickness, surface temperature and solar insolation) with eight neurons in a single hidden layer combination was observed to be the best. The prediction accuracy indicator values of the ANN model were 0.9612 for the coefficient of determination, 0.1971 for the mean absolute percentage error, 0.2317 for the relative root mean square error and 0.00741 for the mean bias error. Using a central composite design model, empirical relationships were developed between input and output responses. The significance of the developed model was ascertained by using analysis of variance, up to a 95% confidence level. For optimization, the RSM was used, and a high efficiency of 17.1% was predicted for the coated solar panel with optimized factors; it was validated to a very high level of predictability. Using interaction and perturbation plots, a ranking of the parameters was done.
{"title":"Enhancing the efficiency of polytetrafluoroethylene-modified silica hydrosols coated solar panels by using artificial neural network and response surface methodology","authors":"Kirthika Ramasamy, C. Murugesan, Senthilkumar Thamilkolunthu","doi":"10.1515/htmp-2022-0273","DOIUrl":"https://doi.org/10.1515/htmp-2022-0273","url":null,"abstract":"Abstract In this article, an attempt was made to improve the efficiency of coated solar panels by using artificial neural networks (ANNs) and response surface methodology (RSM). Using the spray coating technique, the glass surface of the photovoltaic solar panel was coated with silicon dioxide nanoparticles incorporated with polytetrafluoroethylene-modified silica sols. Multilayer perceptron with feed-forward back-propagation algorithm was used to develop ANN models for improving the efficiency of the coated solar panels. Out of the 200 sets of data collected, 75% were used for training and 25% were used for testing. On evaluating the models using performance indicators, a four-input technological parameter model (silicon dioxide nanoparticle quantity, coating thickness, surface temperature and solar insolation) with eight neurons in a single hidden layer combination was observed to be the best. The prediction accuracy indicator values of the ANN model were 0.9612 for the coefficient of determination, 0.1971 for the mean absolute percentage error, 0.2317 for the relative root mean square error and 0.00741 for the mean bias error. Using a central composite design model, empirical relationships were developed between input and output responses. The significance of the developed model was ascertained by using analysis of variance, up to a 95% confidence level. For optimization, the RSM was used, and a high efficiency of 17.1% was predicted for the coated solar panel with optimized factors; it was validated to a very high level of predictability. Using interaction and perturbation plots, a ranking of the parameters was done.","PeriodicalId":12966,"journal":{"name":"High Temperature Materials and Processes","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47603590","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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