Pub Date : 2017-01-01DOI: 10.2320/JINSTMET.J2016058
T. Hayashi, R. Fujishima
Ultrasonic guided waves achieve non ︲ destructive inspection of thin plates. However, issues such as large energy leakage and attenuation often plague guided wave inspection of storage tanks and pipes filled with fluid. This study experimentally investigated the non ︲ destructive testing of a water ︲ loaded flat aluminum alloy plate through the application of a quasi ︲ Scholte （ QS ） wave that propagated along the fluid ︲ plate interface without experiencing attenuation due to leakage. A QS wave was confirmed as having been generated and propagated in a plate loaded with water on the bottom surface using ultrasonic incidence and detection at the top water ︲ free surface. Two ︲ dimensional Fourier transform images of the waveforms revealed reflection of the QS wave from a defect as well as a forward incident QS wave. The visualization results experimentally confirmed — via measurements of waves in water using a laser Doppler vibrometer — that QS waves propagated along a plate surface, while scattered waves were generated by defects.
{"title":"Defect Detection in a Plate Loaded with Water on a Single Surface using Quasi-Scholte Wave","authors":"T. Hayashi, R. Fujishima","doi":"10.2320/JINSTMET.J2016058","DOIUrl":"https://doi.org/10.2320/JINSTMET.J2016058","url":null,"abstract":"Ultrasonic guided waves achieve non ︲ destructive inspection of thin plates. However, issues such as large energy leakage and attenuation often plague guided wave inspection of storage tanks and pipes filled with fluid. This study experimentally investigated the non ︲ destructive testing of a water ︲ loaded flat aluminum alloy plate through the application of a quasi ︲ Scholte （ QS ） wave that propagated along the fluid ︲ plate interface without experiencing attenuation due to leakage. A QS wave was confirmed as having been generated and propagated in a plate loaded with water on the bottom surface using ultrasonic incidence and detection at the top water ︲ free surface. Two ︲ dimensional Fourier transform images of the waveforms revealed reflection of the QS wave from a defect as well as a forward incident QS wave. The visualization results experimentally confirmed — via measurements of waves in water using a laser Doppler vibrometer — that QS waves propagated along a plate surface, while scattered waves were generated by defects.","PeriodicalId":17337,"journal":{"name":"Journal of The Japan Institute of Metals","volume":"1 1","pages":"71-79"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89738395","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 : 2017-01-01DOI: 10.2320/JINSTMET.JE201606
Hifumi Nagai, E. Shibata, Takashi Nakamura
The oxidation–distillation method was used to separate ruthenium (Ru) from a solution containing platinum group metals. In this method, Ru was oxidized to ruthenium tetraoxide (RuO4). The RuO4 was then distilled and recovered from a hydrochloric acid (HCl) solution. In this study, sodium bromate (NaBrO3) was used as the oxidizer, and the amount of NaBrO3 needed to convert Ru to RuO4 was investigated. The Ru in the HCl solution was precipitated as an ammonium ruthenium complex salt by addition of ammonium chloride (NH4Cl) under various conditions and temperatures. The relationship between the precipitation conditions and the properties of the precipitated salts was investigated. The purity of the Ru powder, obtained by pyrolysis of the precipitated salt, was also analyzed. [doi:10.2320/jinstmet.JE201606]
{"title":"Recovery of ruthenium from a solution containing platinum group metals","authors":"Hifumi Nagai, E. Shibata, Takashi Nakamura","doi":"10.2320/JINSTMET.JE201606","DOIUrl":"https://doi.org/10.2320/JINSTMET.JE201606","url":null,"abstract":"The oxidation–distillation method was used to separate ruthenium (Ru) from a solution containing platinum group metals. In this method, Ru was oxidized to ruthenium tetraoxide (RuO4). The RuO4 was then distilled and recovered from a hydrochloric acid (HCl) solution. In this study, sodium bromate (NaBrO3) was used as the oxidizer, and the amount of NaBrO3 needed to convert Ru to RuO4 was investigated. The Ru in the HCl solution was precipitated as an ammonium ruthenium complex salt by addition of ammonium chloride (NH4Cl) under various conditions and temperatures. The relationship between the precipitation conditions and the properties of the precipitated salts was investigated. The purity of the Ru powder, obtained by pyrolysis of the precipitated salt, was also analyzed. [doi:10.2320/jinstmet.JE201606]","PeriodicalId":17337,"journal":{"name":"Journal of The Japan Institute of Metals","volume":"18 1","pages":"178-185"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85129944","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 : 2017-01-01DOI: 10.2320/JINSTMET.JC201702
H. Miura, M. Kobayashi, Y. Todaka, C. Watanabe, Y. Aoyagi
SUS316LN austenitic stainless steel was simply and heavily cold–rolled up to 92% reduction in thickness. The microstructure developed was composed of complicated heterogeneous nano–structure; "eye–shaped" twin domains, which were surrounded by shear bands, were embedded in low–angle lamellar boundaries. The cold–rolled austenitic steel exhibited marvelous high strength of 1.95 GPa when tensile tested normal to the rolling direction, while lower strength of 1.57 GPa along the rolling direction. Moderate ductility around 10 % was still retained in spite of the high strength. The superior mechanical properties of the heavily cold– rolled austenitic stainless steel would be attributed to complicated heterogeneous nano–structures. These achieved strengths were comparable with those obtained by methods of severe plastic deformation. [doi:10.2320/jinstmet.JC201702]
{"title":"Influences of Heterogeneous Nano-Structure Developed in Heavily Cold-Rolled Austenitic Stainless Steel on Texture and Ductility","authors":"H. Miura, M. Kobayashi, Y. Todaka, C. Watanabe, Y. Aoyagi","doi":"10.2320/JINSTMET.JC201702","DOIUrl":"https://doi.org/10.2320/JINSTMET.JC201702","url":null,"abstract":"SUS316LN austenitic stainless steel was simply and heavily cold–rolled up to 92% reduction in thickness. The microstructure developed was composed of complicated heterogeneous nano–structure; \"eye–shaped\" twin domains, which were surrounded by shear bands, were embedded in low–angle lamellar boundaries. The cold–rolled austenitic steel exhibited marvelous high strength of 1.95 GPa when tensile tested normal to the rolling direction, while lower strength of 1.57 GPa along the rolling direction. Moderate ductility around 10 % was still retained in spite of the high strength. The superior mechanical properties of the heavily cold– rolled austenitic stainless steel would be attributed to complicated heterogeneous nano–structures. These achieved strengths were comparable with those obtained by methods of severe plastic deformation. [doi:10.2320/jinstmet.JC201702]","PeriodicalId":17337,"journal":{"name":"Journal of The Japan Institute of Metals","volume":"42 1","pages":"536-541"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85753248","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 : 2017-01-01DOI: 10.2320/JINSTMET.J2017017
Masashi Yoshida, R. Ichiki, S. Kanazawa, S. Yamazaki, Noah Utsumi
Formation of aluminum nitride （ AlN ） films on aluminum surfaces has been achieved by an electric discharge process in liquid nitrogen in very short time. The thickness of the film produced by this process ranged 10 and 20 µ m for time varying between 0 . 12 and 1 . 2 ks. The film was composed of AlN and Aluminum ︲ Oxynitride （ AlON ） and was found to have a complex structure. The film hardness ranged from 778 to 2333 HV, and was affected by the micro defects such as cracks and voids, and the presence of AlON in the film. The hardness was enriched by the presence of AlON. ［ doi:10
{"title":"Formation of Aluminum Nitride Films on Aluminum Surface by an Electric Discharge Process in Liquid Nitrogen","authors":"Masashi Yoshida, R. Ichiki, S. Kanazawa, S. Yamazaki, Noah Utsumi","doi":"10.2320/JINSTMET.J2017017","DOIUrl":"https://doi.org/10.2320/JINSTMET.J2017017","url":null,"abstract":"Formation of aluminum nitride （ AlN ） films on aluminum surfaces has been achieved by an electric discharge process in liquid nitrogen in very short time. The thickness of the film produced by this process ranged 10 and 20 µ m for time varying between 0 . 12 and 1 . 2 ks. The film was composed of AlN and Aluminum ︲ Oxynitride （ AlON ） and was found to have a complex structure. The film hardness ranged from 778 to 2333 HV, and was affected by the micro defects such as cracks and voids, and the presence of AlON in the film. The hardness was enriched by the presence of AlON. ［ doi:10","PeriodicalId":17337,"journal":{"name":"Journal of The Japan Institute of Metals","volume":"15 1","pages":"403-406"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84278075","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 : 2017-01-01DOI: 10.2320/JINSTMET.J2017006
Shogo Takesue, H. Akebono, Mizuki Furukawa, S. Kikuchi, J. Komotori, H. Nomura
In this study, in order to improve the adhesion strength of diamond ︲ like carbon （ DLC ） films, medium carbon steel specimens were treated by using an atmospheric ︲ controlled induction heating fine particle peening （ AIH ︲ FPP ） with Cr particles that have high affinity for DLC films. The AIH ︲ FPP treated specimens were characterized using optical microscope, scanning electron microscope and energy dispersive X ︲ ray spectrometer. It was found that a diffused layer of Cr was formed on the specimen surface that was treated with AIH ︲ FPP. The modified layer was then coated with DLC films, and in order to investigate the adhesion strength of DLC films on the surface modified substrates, reciprocating wear and indentation tests were performed. It was revealed that a Cr diffused layer formed by AIH ︲ FPP treatment improved the adhesion strength of DLC films against sliding loads and large plastic deforma - tions. In addition, the adhesion strength of DLC films was improved by increasing the thickness of a Cr diffused layer and superior friction characteristics were maintained for a long time. These results suggest that a Cr diffused layer induced by AIH ︲ FPP treat - ment is an effective method for improving the adhesion strength of DLC films.
{"title":"Effect of Cr diffused layer formed by AIH-FPP on adhesion strength of DLC films","authors":"Shogo Takesue, H. Akebono, Mizuki Furukawa, S. Kikuchi, J. Komotori, H. Nomura","doi":"10.2320/JINSTMET.J2017006","DOIUrl":"https://doi.org/10.2320/JINSTMET.J2017006","url":null,"abstract":"In this study, in order to improve the adhesion strength of diamond ︲ like carbon （ DLC ） films, medium carbon steel specimens were treated by using an atmospheric ︲ controlled induction heating fine particle peening （ AIH ︲ FPP ） with Cr particles that have high affinity for DLC films. The AIH ︲ FPP treated specimens were characterized using optical microscope, scanning electron microscope and energy dispersive X ︲ ray spectrometer. It was found that a diffused layer of Cr was formed on the specimen surface that was treated with AIH ︲ FPP. The modified layer was then coated with DLC films, and in order to investigate the adhesion strength of DLC films on the surface modified substrates, reciprocating wear and indentation tests were performed. It was revealed that a Cr diffused layer formed by AIH ︲ FPP treatment improved the adhesion strength of DLC films against sliding loads and large plastic deforma - tions. In addition, the adhesion strength of DLC films was improved by increasing the thickness of a Cr diffused layer and superior friction characteristics were maintained for a long time. These results suggest that a Cr diffused layer induced by AIH ︲ FPP treat - ment is an effective method for improving the adhesion strength of DLC films.","PeriodicalId":17337,"journal":{"name":"Journal of The Japan Institute of Metals","volume":"1 1","pages":"352-357"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80697644","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 : 2017-01-01DOI: 10.2320/JINSTMET.JPR2016903
S. Hirosawa
{"title":"Microstructure and Local Magnetism Near Grain Boundaries of Nd-Fe-B Permanent Magnets and Their Impacts on Coercivity","authors":"S. Hirosawa","doi":"10.2320/JINSTMET.JPR2016903","DOIUrl":"https://doi.org/10.2320/JINSTMET.JPR2016903","url":null,"abstract":"","PeriodicalId":17337,"journal":{"name":"Journal of The Japan Institute of Metals","volume":"28 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89244921","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 : 2017-01-01DOI: 10.2320/JINSTMET.J2017024
Ijlal Hasif, M. Shimada, T. Kubota
Magnetic properties of soft magnetic materials under stress are important, however, they have not been fully understood. We have studied on a magnetization process of soft magnetic materials, electrical steel sheets and nanocrystalline alloys, under stress, by investigating DC magnetization curves. As well known, a hysteresis loss of electrical steel sheets increases under compression. We found that the hysteresis loss of nanocrystalline alloys does not depend on stress. In this paper, experimental results and an interpretation on the loss mechanism were described. We have interpreted the magnetization process under compression as follows: magnetic domains distribute perpendicular to compression due to magnetoelasticity; the magnetization process is 90 degree domain wall movements in the domains. Based on this interpretation, the hysteresis loss under compression is well understood. Electrical steel sheets have crystal grains; so, the domain wall is trapped at the grain boundary in the movement process; then, hysteresis loss generates. On the other hand, nanocrytalline alloys have no crystal grains; therefore, the domain wall movement is smoothly and there is no hysteresis loss. [doi:10.2320/jinstmet.J2017024]
{"title":"Stress Dependence of Hysteresis Loss on Iron-Based Soft Magnetic Materials","authors":"Ijlal Hasif, M. Shimada, T. Kubota","doi":"10.2320/JINSTMET.J2017024","DOIUrl":"https://doi.org/10.2320/JINSTMET.J2017024","url":null,"abstract":"Magnetic properties of soft magnetic materials under stress are important, however, they have not been fully understood. We have studied on a magnetization process of soft magnetic materials, electrical steel sheets and nanocrystalline alloys, under stress, by investigating DC magnetization curves. As well known, a hysteresis loss of electrical steel sheets increases under compression. We found that the hysteresis loss of nanocrystalline alloys does not depend on stress. In this paper, experimental results and an interpretation on the loss mechanism were described. We have interpreted the magnetization process under compression as follows: magnetic domains distribute perpendicular to compression due to magnetoelasticity; the magnetization process is 90 degree domain wall movements in the domains. Based on this interpretation, the hysteresis loss under compression is well understood. Electrical steel sheets have crystal grains; so, the domain wall is trapped at the grain boundary in the movement process; then, hysteresis loss generates. On the other hand, nanocrytalline alloys have no crystal grains; therefore, the domain wall movement is smoothly and there is no hysteresis loss. [doi:10.2320/jinstmet.J2017024]","PeriodicalId":17337,"journal":{"name":"Journal of The Japan Institute of Metals","volume":"26 1","pages":"39-43"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80422188","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 : 2017-01-01DOI: 10.2320/JINSTMET.JC201704
Y. Takayama, Kohei Tanaka, Hideo Watanabe
Temperature gradient annealing has been applied to high purity titanium sheet to investigate microstructural and textural evolutions. The annealing with high temperature gradient was performed through a specially designed apparatus for the titanium sheet subjected to continuous cyclic bending (CCB). EBSD analysis revealed characteristic microstructure on cross–section consisting of coarse grained triangular area, in which coarse grains formed inside deeplier at higher temperature side, resulting from higher stored strain and higher temperature annealing, and non–recrystallized fine grained area held at lower temperature. Textural evolution was also examined for the CCBent and annealed titanium sheets. Further, effects of the temperature gradient annealing were discussed. [doi:10.2320/jinstmet.JC201704]
{"title":"Microstructural Evolution in High Purity Titanium Sheet Subjected to Continuous Cyclic Bending and Subsequent Temperature Gradient Annealing","authors":"Y. Takayama, Kohei Tanaka, Hideo Watanabe","doi":"10.2320/JINSTMET.JC201704","DOIUrl":"https://doi.org/10.2320/JINSTMET.JC201704","url":null,"abstract":"Temperature gradient annealing has been applied to high purity titanium sheet to investigate microstructural and textural evolutions. The annealing with high temperature gradient was performed through a specially designed apparatus for the titanium sheet subjected to continuous cyclic bending (CCB). EBSD analysis revealed characteristic microstructure on cross–section consisting of coarse grained triangular area, in which coarse grains formed inside deeplier at higher temperature side, resulting from higher stored strain and higher temperature annealing, and non–recrystallized fine grained area held at lower temperature. Textural evolution was also examined for the CCBent and annealed titanium sheets. Further, effects of the temperature gradient annealing were discussed. [doi:10.2320/jinstmet.JC201704]","PeriodicalId":17337,"journal":{"name":"Journal of The Japan Institute of Metals","volume":"34 1","pages":"547-554"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74795620","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 : 2017-01-01DOI: 10.2320/JINSTMET.JBW201603
Yamada Yohei, Nakakubo Shohei, Takeda Mikako
In the hot rolling process, the external appearance of steel can deteriorate due to spalling of oxide scales. We used a tensile test in order to evaluate and quantify the adhesion of the scales in the hot rolling process. When loaded with tensile stress, the behavior of the scales goes through the following three stages: 1 The scales have only residual stress 2 The scales and the steel are both elastically deformed 3 The scales are elastically deformed but the steel is plastically deformed. For these three stages, the strain energy accumulated in the scales before spalling was calculated and then the adhesion energy was derived. For about 4 μm thick scales on 99.9% Fe and Fe–1.0%C the adhesion energies were 1.70 J/m2 and 36.2 J/m2, respectively. The adhesion energies determined by a scratch test were 2.90 J/m2, and 31.6 J/m2 each. Thus, the results of the two tests are approximately in agreement. [doi:10.2320/jinstmet.JBW201603]
{"title":"Evaluation of Adhesion of Oxide Scale by Tensile Test","authors":"Yamada Yohei, Nakakubo Shohei, Takeda Mikako","doi":"10.2320/JINSTMET.JBW201603","DOIUrl":"https://doi.org/10.2320/JINSTMET.JBW201603","url":null,"abstract":"In the hot rolling process, the external appearance of steel can deteriorate due to spalling of oxide scales. We used a tensile test in order to evaluate and quantify the adhesion of the scales in the hot rolling process. When loaded with tensile stress, the behavior of the scales goes through the following three stages: 1 The scales have only residual stress 2 The scales and the steel are both elastically deformed 3 The scales are elastically deformed but the steel is plastically deformed. For these three stages, the strain energy accumulated in the scales before spalling was calculated and then the adhesion energy was derived. For about 4 μm thick scales on 99.9% Fe and Fe–1.0%C the adhesion energies were 1.70 J/m2 and 36.2 J/m2, respectively. The adhesion energies determined by a scratch test were 2.90 J/m2, and 31.6 J/m2 each. Thus, the results of the two tests are approximately in agreement. [doi:10.2320/jinstmet.JBW201603]","PeriodicalId":17337,"journal":{"name":"Journal of The Japan Institute of Metals","volume":"385 1","pages":"206-210"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74935346","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 : 2017-01-01DOI: 10.2320/JINSTMET.JA201606
T. Sasaki, T. Ohkubo, K. Hono
{"title":"Microstructure of Nd-Fe-B Sintered Magnets—Structure of Grain Boundaries and Interface","authors":"T. Sasaki, T. Ohkubo, K. Hono","doi":"10.2320/JINSTMET.JA201606","DOIUrl":"https://doi.org/10.2320/JINSTMET.JA201606","url":null,"abstract":"","PeriodicalId":17337,"journal":{"name":"Journal of The Japan Institute of Metals","volume":"119 1","pages":"2-10"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85702894","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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