Process and kinetic analysis of osmium prepared by microwave sintering
Os sintered body was prepared by microwave sintering process. The influences of the green compact pressure and the microwave sintering parameters (heating rate, sintering temperature, and holding time) on the microstructure and relative density of Os sintered bodies were investigated. The densificat...
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| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | zho |
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Editorial Office of Powder Metallurgy Technology
2021-10-01
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| Series: | Fenmo yejin jishu |
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| Online Access: | https://pmt.ustb.edu.cn/article/doi/10.19591/j.cnki.cn11-1974/tf.2021030013 |
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| _version_ | 1846127389881401344 |
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| author | LIU Wei LI Shi-lei ZHOU Fan YANG Yun-fei XIE Yuan-feng XIA Yang LÜ Hong ZHANG Chao ZHANG Xiao-ke WANG Jin-shu |
| author_facet | LIU Wei LI Shi-lei ZHOU Fan YANG Yun-fei XIE Yuan-feng XIA Yang LÜ Hong ZHANG Chao ZHANG Xiao-ke WANG Jin-shu |
| author_sort | LIU Wei |
| collection | DOAJ |
| description | Os sintered body was prepared by microwave sintering process. The influences of the green compact pressure and the microwave sintering parameters (heating rate, sintering temperature, and holding time) on the microstructure and relative density of Os sintered bodies were investigated. The densification mechanism of Os microwave sintering was analyzed. The results show that, the average grain size of Os after microwave sintering at 1350 ℃ is about 0.22 μm, which is close to the average particle size of the Os powders. With the increase of the sintering temperature to 1500 ℃, the grain size grows to 0.76 μm. The relative density of the Os sintered body increases rapidly at first and then slowly after prolonging the holding time sintered at 1500 ℃. After microwave sintering at 1500 ℃ for 60 min, the relative density of the Os sintered body is 94.3%, and the average particle size is less than 1 μm. The sintering kinetics analysis shows that the densification process of Os is the result of the combined action of volume diffusion and grain boundary diffusion. With the increase of the sintering temperature, the diffusion mechanism gradually transfers from grain boundary diffusion to volume diffusion. |
| format | Article |
| id | doaj-art-8bd83266e20b41e4b7587acc1ac6f6b2 |
| institution | Kabale University |
| issn | 1001-3784 |
| language | zho |
| publishDate | 2021-10-01 |
| publisher | Editorial Office of Powder Metallurgy Technology |
| record_format | Article |
| series | Fenmo yejin jishu |
| spelling | doaj-art-8bd83266e20b41e4b7587acc1ac6f6b22024-12-12T03:13:33ZzhoEditorial Office of Powder Metallurgy TechnologyFenmo yejin jishu1001-37842021-10-0139539440210.19591/j.cnki.cn11-1974/tf.2021030013Process and kinetic analysis of osmium prepared by microwave sinteringLIU Wei0LI Shi-lei1ZHOU Fan2YANG Yun-fei3XIE Yuan-feng4XIA Yang5LÜ Hong6ZHANG Chao7ZHANG Xiao-ke8WANG Jin-shu9Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 10024, ChinaFaculty of Materials and Manufacturing, Beijing University of Technology, Beijing 10024, ChinaFaculty of Materials and Manufacturing, Beijing University of Technology, Beijing 10024, ChinaFaculty of Materials and Manufacturing, Beijing University of Technology, Beijing 10024, ChinaGRIMAT Engineering Institute Co., Ltd., Beijing 101407, ChinaGRIMAT Engineering Institute Co., Ltd., Beijing 101407, ChinaGRIMAT Engineering Institute Co., Ltd., Beijing 101407, ChinaGRIMAT Engineering Institute Co., Ltd., Beijing 101407, ChinaFaculty of Materials and Manufacturing, Beijing University of Technology, Beijing 10024, ChinaFaculty of Materials and Manufacturing, Beijing University of Technology, Beijing 10024, ChinaOs sintered body was prepared by microwave sintering process. The influences of the green compact pressure and the microwave sintering parameters (heating rate, sintering temperature, and holding time) on the microstructure and relative density of Os sintered bodies were investigated. The densification mechanism of Os microwave sintering was analyzed. The results show that, the average grain size of Os after microwave sintering at 1350 ℃ is about 0.22 μm, which is close to the average particle size of the Os powders. With the increase of the sintering temperature to 1500 ℃, the grain size grows to 0.76 μm. The relative density of the Os sintered body increases rapidly at first and then slowly after prolonging the holding time sintered at 1500 ℃. After microwave sintering at 1500 ℃ for 60 min, the relative density of the Os sintered body is 94.3%, and the average particle size is less than 1 μm. The sintering kinetics analysis shows that the densification process of Os is the result of the combined action of volume diffusion and grain boundary diffusion. With the increase of the sintering temperature, the diffusion mechanism gradually transfers from grain boundary diffusion to volume diffusion.https://pmt.ustb.edu.cn/article/doi/10.19591/j.cnki.cn11-1974/tf.2021030013osmiummicrowave sinteringdensificationsintering kineticsdiffusion mechanism |
| spellingShingle | LIU Wei LI Shi-lei ZHOU Fan YANG Yun-fei XIE Yuan-feng XIA Yang LÜ Hong ZHANG Chao ZHANG Xiao-ke WANG Jin-shu Process and kinetic analysis of osmium prepared by microwave sintering Fenmo yejin jishu osmium microwave sintering densification sintering kinetics diffusion mechanism |
| title | Process and kinetic analysis of osmium prepared by microwave sintering |
| title_full | Process and kinetic analysis of osmium prepared by microwave sintering |
| title_fullStr | Process and kinetic analysis of osmium prepared by microwave sintering |
| title_full_unstemmed | Process and kinetic analysis of osmium prepared by microwave sintering |
| title_short | Process and kinetic analysis of osmium prepared by microwave sintering |
| title_sort | process and kinetic analysis of osmium prepared by microwave sintering |
| topic | osmium microwave sintering densification sintering kinetics diffusion mechanism |
| url | https://pmt.ustb.edu.cn/article/doi/10.19591/j.cnki.cn11-1974/tf.2021030013 |
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