The purpose of this research is to produce high hardness of Mg from cutting chips using MM-SPS process. Effects of different starting materials, such as powder and cutting chips of Mg, on the properties were investigated. The influence of sintering holding times on the properties was also investigated to establish between the process conditions and the properties. Hardness testing and X-ray diffraction were carried out for characterization of powders and bulk materials. The results of hardness indicated that MM-SPS process can synthesis upgrade recycled material fabricated from Mg cutting chips. In the case of cutting chips, the maximum hardness was observed at 6 hours of MM and 60 min of sintering holding time. On the other hand, in the case of powder showed the maximum hardness at 6 hours of MM and 10 min of sintering holding time. However, the hardness did not increase with increasing sintering holding time. No solid-state reaction was observed in SPS materials fabricated from powder and cutting chips. In addition, no contamination of impurities during MM treatment was observed.
{"title":"MM-SPSプロセスによるMg切削屑の固相リサイクル材およびその特性","authors":"Takumi TANAKA, Masahiro KUBOTA","doi":"10.2497/jjspm.23-00015","DOIUrl":"https://doi.org/10.2497/jjspm.23-00015","url":null,"abstract":"The purpose of this research is to produce high hardness of Mg from cutting chips using MM-SPS process. Effects of different starting materials, such as powder and cutting chips of Mg, on the properties were investigated. The influence of sintering holding times on the properties was also investigated to establish between the process conditions and the properties. Hardness testing and X-ray diffraction were carried out for characterization of powders and bulk materials. The results of hardness indicated that MM-SPS process can synthesis upgrade recycled material fabricated from Mg cutting chips. In the case of cutting chips, the maximum hardness was observed at 6 hours of MM and 60 min of sintering holding time. On the other hand, in the case of powder showed the maximum hardness at 6 hours of MM and 10 min of sintering holding time. However, the hardness did not increase with increasing sintering holding time. No solid-state reaction was observed in SPS materials fabricated from powder and cutting chips. In addition, no contamination of impurities during MM treatment was observed.","PeriodicalId":35600,"journal":{"name":"Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136227970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-15DOI: 10.2497/jjspm.70.pref11_1
{"title":"JSPMIC2023ならびに2023年度秋季大会報告","authors":"","doi":"10.2497/jjspm.70.pref11_1","DOIUrl":"https://doi.org/10.2497/jjspm.70.pref11_1","url":null,"abstract":"","PeriodicalId":35600,"journal":{"name":"Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136227814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-15DOI: 10.2497/jjspm.70.pref11_2
{"title":"講演大会企画セッションテーマ提案のお願い","authors":"","doi":"10.2497/jjspm.70.pref11_2","DOIUrl":"https://doi.org/10.2497/jjspm.70.pref11_2","url":null,"abstract":"","PeriodicalId":35600,"journal":{"name":"Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136227968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yoshio SAKKA, Kazuya TAKAHASHI, Tetsuo UCHIKOSHI, Koji MORITA, Tohru S. SUZUKI
Hydroxyapatite (HAP, Ca10(PO4)6(OH)2) is a major component of bones and teeth and requires a specific crystal orientation for biomaterial applications. We have developed a method to control the orientation by applying a strong magnetic field during colloidal processing. In this study, we have demonstrated that suspensions with dispersed agglomeration-free nano particles can be produced by beads-milling HAP particles with zirconia beads as small as 0.05 mm. By slip casting in a high magnetic field and sintering using suspensions with dispersed agglomeration-free nano particles, high-density and oriented sintered bodies were successfully fabricated at low temperatures.
{"title":"Dispersion of Hydroxyapatite Nanoparticle by Beads Milling and Its Effect on Magnetic Field Orientation","authors":"Yoshio SAKKA, Kazuya TAKAHASHI, Tetsuo UCHIKOSHI, Koji MORITA, Tohru S. SUZUKI","doi":"10.2497/jjspm.23-00035","DOIUrl":"https://doi.org/10.2497/jjspm.23-00035","url":null,"abstract":"Hydroxyapatite (HAP, Ca10(PO4)6(OH)2) is a major component of bones and teeth and requires a specific crystal orientation for biomaterial applications. We have developed a method to control the orientation by applying a strong magnetic field during colloidal processing. In this study, we have demonstrated that suspensions with dispersed agglomeration-free nano particles can be produced by beads-milling HAP particles with zirconia beads as small as 0.05 mm. By slip casting in a high magnetic field and sintering using suspensions with dispersed agglomeration-free nano particles, high-density and oriented sintered bodies were successfully fabricated at low temperatures.","PeriodicalId":35600,"journal":{"name":"Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136184622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Electrophoresis of particles by applying an electric field to a colloidal suspension allows simultaneous manipulation and shaping of particles. A film forming process utilizing the electrophoretic phenomenon of charged particles in a liquid is called “electrophoretic deposition (EPD)” and is used for powder coating. The main difference between the EPD process and other colloidal processes is the coexistence of electrode reactions, ie electrochemical reactions that occur at the interface between the electrode and the electrolyte solution. The applied electric field in the EPD method plays an important role not only in the electrophoresis of charged particles but also in controlling the coagulation mechanism and film quality. This paper introduces the principle of the EPD process considering the electrode reaction and an example of the functional film formation process.
{"title":"液中帯電粒子の電気泳動現象と電極反応を利用したコロイド成膜プロセス","authors":"Tetsuo UCHIKOSHI","doi":"10.2497/jjspm.23-00033","DOIUrl":"https://doi.org/10.2497/jjspm.23-00033","url":null,"abstract":"Electrophoresis of particles by applying an electric field to a colloidal suspension allows simultaneous manipulation and shaping of particles. A film forming process utilizing the electrophoretic phenomenon of charged particles in a liquid is called “electrophoretic deposition (EPD)” and is used for powder coating. The main difference between the EPD process and other colloidal processes is the coexistence of electrode reactions, ie electrochemical reactions that occur at the interface between the electrode and the electrolyte solution. The applied electric field in the EPD method plays an important role not only in the electrophoresis of charged particles but also in controlling the coagulation mechanism and film quality. This paper introduces the principle of the EPD process considering the electrode reaction and an example of the functional film formation process.","PeriodicalId":35600,"journal":{"name":"Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136184607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We have established an evaluation method based on optical coherence tomography (OCT), which uses light interference, as a method for three-dimensional in-situ observation of the internal structure of slurries, compacts, and sintered bodies. Nondestructive inspection by evaluating defects inside sintered bodies, dynamic changes in particle sedimentation and drying processes in ceramic slurries, quantitative evaluation of pore structures in dry forming under applied stress, and visualization of internal structures under high temperature in dewaxing and sintering are enabled. This method is expected to be of great help in research and development as an innovative evaluation method that enables consistent and direct observation of structural changes from the micrometer scale equivalent to particle size to the millimeter scale equivalent to bulk materials under a variety of actual environment conditions.
{"title":"Development of a New Evaluation Method based on Optical Coherence Tomography Observation to Obtain Information on Internal Structural Changes in Real Time and in Three Dimensions during the Ceramics Manufacturing Process","authors":"Takuma TAKAHASHI, Junichi TATAMI","doi":"10.2497/jjspm.23-00037","DOIUrl":"https://doi.org/10.2497/jjspm.23-00037","url":null,"abstract":"We have established an evaluation method based on optical coherence tomography (OCT), which uses light interference, as a method for three-dimensional in-situ observation of the internal structure of slurries, compacts, and sintered bodies. Nondestructive inspection by evaluating defects inside sintered bodies, dynamic changes in particle sedimentation and drying processes in ceramic slurries, quantitative evaluation of pore structures in dry forming under applied stress, and visualization of internal structures under high temperature in dewaxing and sintering are enabled. This method is expected to be of great help in research and development as an innovative evaluation method that enables consistent and direct observation of structural changes from the micrometer scale equivalent to particle size to the millimeter scale equivalent to bulk materials under a variety of actual environment conditions.","PeriodicalId":35600,"journal":{"name":"Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136184608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-15DOI: 10.2497/jjspm.70.mtgpr10_1
{"title":"2023年度秋季大会プログラム","authors":"","doi":"10.2497/jjspm.70.mtgpr10_1","DOIUrl":"https://doi.org/10.2497/jjspm.70.mtgpr10_1","url":null,"abstract":"","PeriodicalId":35600,"journal":{"name":"Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136184612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-15DOI: 10.2497/jjspm.70.mtg10_2
{"title":"2023年度粉末冶金講座","authors":"","doi":"10.2497/jjspm.70.mtg10_2","DOIUrl":"https://doi.org/10.2497/jjspm.70.mtg10_2","url":null,"abstract":"","PeriodicalId":35600,"journal":{"name":"Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136184610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-15DOI: 10.2497/jjspm.70.pref10_1
{"title":"オープンアクセスと電子ジャーナルへの早期掲載について","authors":"","doi":"10.2497/jjspm.70.pref10_1","DOIUrl":"https://doi.org/10.2497/jjspm.70.pref10_1","url":null,"abstract":"","PeriodicalId":35600,"journal":{"name":"Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136184784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-15DOI: 10.2497/jjspm.70.pref9_1
{"title":"2023年度秋季大会講演特集のご案内","authors":"","doi":"10.2497/jjspm.70.pref9_1","DOIUrl":"https://doi.org/10.2497/jjspm.70.pref9_1","url":null,"abstract":"","PeriodicalId":35600,"journal":{"name":"Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135354544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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