Pub Date : 2023-07-01DOI: 10.2320/matertrans.mt-mf2022004
H. Sena, M. Fuji
{"title":"Band Gap Engineering of Semiconductors and Ceramics by Severe Plastic Deformation for Solar Energy Harvesting","authors":"H. Sena, M. Fuji","doi":"10.2320/matertrans.mt-mf2022004","DOIUrl":"https://doi.org/10.2320/matertrans.mt-mf2022004","url":null,"abstract":"","PeriodicalId":18402,"journal":{"name":"Materials Transactions","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41872201","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}
The macroscopic creep properties of negative electrodes in lithium-ion batteries and their estimation methods have been investigated based on the microscopic structure of the electrode. Tensile and creep tests were conducted on a negative electrode consisting of carbon powder and polyvinylidene fluoride (PVDF) binder. The stress-strain curve, the time history of the tensile strain, and the creep rupture time were measured in these tests and estimated using the simple model proposed in this study. The proposed model approximates the alignment of carbon particles as body-centered cubic (bcc) or face-centered cubic (fcc). The external load on the model was supported by a PVDF binder located between carbon particles. The test results showed that PVDF binder mechanical properties affect the macroscopic mechanical properties of the negative electrode, including the creep properties. The stress-strain curve and time history of the tensile strain were located between the upper and lower limits of the proposed model. The tensile strength and creep rupture time agree with the lower limit of the proposed model.
{"title":"Simple Estimation of Creep Properties of Negative Electrode for Lithium-Ion Battery","authors":"Shota Ono, Kairi Shiraishi, Yoshinao Kishimoto, Yukiyoshi Kobayashi, Hiroshi Yamazaki, Takahiro Nomoto","doi":"10.2320/matertrans.mt-z2023003","DOIUrl":"https://doi.org/10.2320/matertrans.mt-z2023003","url":null,"abstract":"The macroscopic creep properties of negative electrodes in lithium-ion batteries and their estimation methods have been investigated based on the microscopic structure of the electrode. Tensile and creep tests were conducted on a negative electrode consisting of carbon powder and polyvinylidene fluoride (PVDF) binder. The stress-strain curve, the time history of the tensile strain, and the creep rupture time were measured in these tests and estimated using the simple model proposed in this study. The proposed model approximates the alignment of carbon particles as body-centered cubic (bcc) or face-centered cubic (fcc). The external load on the model was supported by a PVDF binder located between carbon particles. The test results showed that PVDF binder mechanical properties affect the macroscopic mechanical properties of the negative electrode, including the creep properties. The stress-strain curve and time history of the tensile strain were located between the upper and lower limits of the proposed model. The tensile strength and creep rupture time agree with the lower limit of the proposed model.","PeriodicalId":18402,"journal":{"name":"Materials Transactions","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135061278","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 : 2023-07-01DOI: 10.2320/matertrans.mt-m2023011
T. Nagase
{"title":"Design and Characterization of Al–Co–La–Bi Multicomponent Immiscible Alloys with Liquid Phase Separation and an Amorphous Phase Formation","authors":"T. Nagase","doi":"10.2320/matertrans.mt-m2023011","DOIUrl":"https://doi.org/10.2320/matertrans.mt-m2023011","url":null,"abstract":"","PeriodicalId":18402,"journal":{"name":"Materials Transactions","volume":"1 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69112236","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 : 2023-07-01DOI: 10.2320/matertrans.mt-mf2022017
V. Beloshenko, A. Vozniak, Andrei Voznyak
{"title":"Equal Channel Angular Extrusion of Polymers: Structural Changes and Their Effects on Properties","authors":"V. Beloshenko, A. Vozniak, Andrei Voznyak","doi":"10.2320/matertrans.mt-mf2022017","DOIUrl":"https://doi.org/10.2320/matertrans.mt-mf2022017","url":null,"abstract":"","PeriodicalId":18402,"journal":{"name":"Materials Transactions","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42952726","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 : 2023-07-01DOI: 10.2320/matertrans.mt-mf2022051
Zheng Li, Y. Liu, J. Wang, T. Langdon
{"title":"Tube High-Pressure Shearing: A Simple Shear Path to Unusual Microstructures and Unprecedented Properties","authors":"Zheng Li, Y. Liu, J. Wang, T. Langdon","doi":"10.2320/matertrans.mt-mf2022051","DOIUrl":"https://doi.org/10.2320/matertrans.mt-mf2022051","url":null,"abstract":"","PeriodicalId":18402,"journal":{"name":"Materials Transactions","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46175539","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 : 2023-07-01DOI: 10.2320/matertrans.mt-mf2022014
A. Jorge Jr, Virginie Roche, D. Pérez, R. Valiev
{"title":"Nanostructuring Ti-Alloys by HPT: Phase Transformation, Mechanical and Corrosion Properties, and Bioactivation","authors":"A. Jorge Jr, Virginie Roche, D. Pérez, R. Valiev","doi":"10.2320/matertrans.mt-mf2022014","DOIUrl":"https://doi.org/10.2320/matertrans.mt-mf2022014","url":null,"abstract":"","PeriodicalId":18402,"journal":{"name":"Materials Transactions","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48353430","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 : 2023-07-01DOI: 10.2320/matertrans.mt-mf2022024
S. Kuramoto, Y. Kawano, Yuwa Mori, J. Kobayashi, S. Emura, T. Sawaguchi
{"title":"Mechanical Properties and Deformation Behavior in Severely Cold-Rolled Fe–Ni–Al–C Alloys with Lüders Deformation —Overview with Recent Experimental Results—","authors":"S. Kuramoto, Y. Kawano, Yuwa Mori, J. Kobayashi, S. Emura, T. Sawaguchi","doi":"10.2320/matertrans.mt-mf2022024","DOIUrl":"https://doi.org/10.2320/matertrans.mt-mf2022024","url":null,"abstract":"","PeriodicalId":18402,"journal":{"name":"Materials Transactions","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49057709","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 : 2023-07-01DOI: 10.2320/matertrans.mt-z2023002
Tomoyuki Fujii, Shu Saito, Yoshinobu Shimamura
Porous metals, which include small pores inside metals, are promising materials due to their material and structural characteristics. Although they generally exhibit low strength because the pores behave as defects, porous metals are expected to achieve high specific strength due to their ultra-lightweight characteristic. This paper deals with a feasibility study on the fabrication of porous steels for developing unique metals with a high specific strength. Porous steels were fabricated via powder metallurgy-based space holder technique. Alloy tool steel, SKD11, and sodium chloride, NaCl, were used as a scaffold metal and spacer material, respectively. Mixed powders of SKD11 and NaCl were sintered via the spark plasma sintering technique. Each sintered compact was re-heated in an argon atmosphere to remove NaCl and densify the scaffold in the compact. Then, each compact was quenched and tempered. As a result, open-cell porous steels with porosities of 60% and 70% were successfully fabricated. The heat treatment refined the microstructure of the scaffold without changing the pore shape, porosity, etc., improving their strength property, irrespective of their porosity. Furthermore, the specific proof strength of heat-treated porous steels was comparable to that of dense pure aluminum.
{"title":"Fabrication of Porous Steels via Space Holder Technique and Their Mechanical Properties","authors":"Tomoyuki Fujii, Shu Saito, Yoshinobu Shimamura","doi":"10.2320/matertrans.mt-z2023002","DOIUrl":"https://doi.org/10.2320/matertrans.mt-z2023002","url":null,"abstract":"Porous metals, which include small pores inside metals, are promising materials due to their material and structural characteristics. Although they generally exhibit low strength because the pores behave as defects, porous metals are expected to achieve high specific strength due to their ultra-lightweight characteristic. This paper deals with a feasibility study on the fabrication of porous steels for developing unique metals with a high specific strength. Porous steels were fabricated via powder metallurgy-based space holder technique. Alloy tool steel, SKD11, and sodium chloride, NaCl, were used as a scaffold metal and spacer material, respectively. Mixed powders of SKD11 and NaCl were sintered via the spark plasma sintering technique. Each sintered compact was re-heated in an argon atmosphere to remove NaCl and densify the scaffold in the compact. Then, each compact was quenched and tempered. As a result, open-cell porous steels with porosities of 60% and 70% were successfully fabricated. The heat treatment refined the microstructure of the scaffold without changing the pore shape, porosity, etc., improving their strength property, irrespective of their porosity. Furthermore, the specific proof strength of heat-treated porous steels was comparable to that of dense pure aluminum.","PeriodicalId":18402,"journal":{"name":"Materials Transactions","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135209916","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 : 2023-06-01DOI: 10.2320/matertrans.mt-me2022009
Yu Zhang, Mingqi Dong, Weiwei Zhou, N. Nomura
{"title":"Microstructure and Mechanical Property of MXene-Added Ti–6Al–4V Alloy Fabricated by Laser Powder Bed Fusion","authors":"Yu Zhang, Mingqi Dong, Weiwei Zhou, N. Nomura","doi":"10.2320/matertrans.mt-me2022009","DOIUrl":"https://doi.org/10.2320/matertrans.mt-me2022009","url":null,"abstract":"","PeriodicalId":18402,"journal":{"name":"Materials Transactions","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48935563","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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