Synthesis of TiB2/Ti(C,N) cermet by RSPS: formation mechanism, shrinkage behavior, and mechanical properties
TiB2/Ti(C,N) cermet was prepared by reactive spark plasma sintering from the Co-Ti-BN-C-carbide powder compact. The formation mechanism and shrinkage behavior were studied. Results showed that Ti(C,N) was produced by the diffusion of C atoms into a preformed TiN. TiN-forming reaction was exothermic,...
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Elsevier
2023-07-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423013522 |
| _version_ | 1797745204424343552 |
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| author | Mengxian Zhang Xianrui Zhao Junting Zhang Yihang Fang Huan Xu YingMing Deng Linhe Chen |
| author_facet | Mengxian Zhang Xianrui Zhao Junting Zhang Yihang Fang Huan Xu YingMing Deng Linhe Chen |
| author_sort | Mengxian Zhang |
| collection | DOAJ |
| description | TiB2/Ti(C,N) cermet was prepared by reactive spark plasma sintering from the Co-Ti-BN-C-carbide powder compact. The formation mechanism and shrinkage behavior were studied. Results showed that Ti(C,N) was produced by the diffusion of C atoms into a preformed TiN. TiN-forming reaction was exothermic, which would lead to the occurrence of deep macropores and an abnormal expansion phenomenon. With increasing temperature, the macropores became increasingly shallow. Eventually, they disappeared through the viscous flow and dissolution-reaction-precipitation mechanisms. This behavior was primarily responsible for sintering densification. Among various carbide additives, TaC displayed the optimal effect. The hardness and fracture toughness of cermet reached 1917.4 HV and 8.81 MPa m−1/2. The reason was the formation of a black core/gray rim structure by the diffusion of heavy elements in liquid into the Ti(C,N). Results from the present work could offer a deep understanding of reactive spark plasma sintering, and would be beneficial for the development of Ti(C,N)-based cermet. |
| first_indexed | 2024-03-12T15:20:57Z |
| format | Article |
| id | doaj.art-93e3bb8a33d24d1f8bf60a6127767713 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-12T15:20:57Z |
| publishDate | 2023-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-93e3bb8a33d24d1f8bf60a61277677132023-08-11T05:33:34ZengElsevierJournal of Materials Research and Technology2238-78542023-07-012527022716Synthesis of TiB2/Ti(C,N) cermet by RSPS: formation mechanism, shrinkage behavior, and mechanical propertiesMengxian Zhang0Xianrui Zhao1Junting Zhang2Yihang Fang3Huan Xu4YingMing Deng5Linhe Chen6Jiangxi Provincial Engineering Research Center of Materials Surface Remanufacturing, School of Materials Science and Engineering, Jiujiang University, Jiujiang, 332005, ChinaSchool of Naval Architecture & Ocean Engineering, Jiangsu Maritime Institute, Nanjing, 211170, ChinaSchool of Education, Jiujiang University, Jiujiang, 332005, ChinaSchool of Additive Manufacturing, Zhejiang Institute of Mechanical & Electrical Engineering, Hangzhou, 310053, China; Corresponding author.Jiangxi Provincial Engineering Research Center of Materials Surface Remanufacturing, School of Materials Science and Engineering, Jiujiang University, Jiujiang, 332005, China; Corresponding author.Jiangxi Provincial Engineering Research Center of Materials Surface Remanufacturing, School of Materials Science and Engineering, Jiujiang University, Jiujiang, 332005, ChinaJiangxi Provincial Engineering Research Center of Materials Surface Remanufacturing, School of Materials Science and Engineering, Jiujiang University, Jiujiang, 332005, ChinaTiB2/Ti(C,N) cermet was prepared by reactive spark plasma sintering from the Co-Ti-BN-C-carbide powder compact. The formation mechanism and shrinkage behavior were studied. Results showed that Ti(C,N) was produced by the diffusion of C atoms into a preformed TiN. TiN-forming reaction was exothermic, which would lead to the occurrence of deep macropores and an abnormal expansion phenomenon. With increasing temperature, the macropores became increasingly shallow. Eventually, they disappeared through the viscous flow and dissolution-reaction-precipitation mechanisms. This behavior was primarily responsible for sintering densification. Among various carbide additives, TaC displayed the optimal effect. The hardness and fracture toughness of cermet reached 1917.4 HV and 8.81 MPa m−1/2. The reason was the formation of a black core/gray rim structure by the diffusion of heavy elements in liquid into the Ti(C,N). Results from the present work could offer a deep understanding of reactive spark plasma sintering, and would be beneficial for the development of Ti(C,N)-based cermet.http://www.sciencedirect.com/science/article/pii/S2238785423013522Formation mechanismShrinkage behaviorBlack core/gray rimReactive spark plasma sintering |
| spellingShingle | Mengxian Zhang Xianrui Zhao Junting Zhang Yihang Fang Huan Xu YingMing Deng Linhe Chen Synthesis of TiB2/Ti(C,N) cermet by RSPS: formation mechanism, shrinkage behavior, and mechanical properties Journal of Materials Research and Technology Formation mechanism Shrinkage behavior Black core/gray rim Reactive spark plasma sintering |
| title | Synthesis of TiB2/Ti(C,N) cermet by RSPS: formation mechanism, shrinkage behavior, and mechanical properties |
| title_full | Synthesis of TiB2/Ti(C,N) cermet by RSPS: formation mechanism, shrinkage behavior, and mechanical properties |
| title_fullStr | Synthesis of TiB2/Ti(C,N) cermet by RSPS: formation mechanism, shrinkage behavior, and mechanical properties |
| title_full_unstemmed | Synthesis of TiB2/Ti(C,N) cermet by RSPS: formation mechanism, shrinkage behavior, and mechanical properties |
| title_short | Synthesis of TiB2/Ti(C,N) cermet by RSPS: formation mechanism, shrinkage behavior, and mechanical properties |
| title_sort | synthesis of tib2 ti c n cermet by rsps formation mechanism shrinkage behavior and mechanical properties |
| topic | Formation mechanism Shrinkage behavior Black core/gray rim Reactive spark plasma sintering |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423013522 |
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