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Properties of TiC Reinforced Ti-Composites Synthesized in Situ by Microwave Sintering |
HU Manying1, OUYANG Delai1( ), CUI Xia1, DU Haiming2, XU Yong1 |
1.School of Materials Science and Engineering, Nanchang Hangkong University, Jiangxi 330063, China 2.Jiangxi Normal University, Jiangxi 330022, China |
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Cite this article:
HU Manying, OUYANG Delai, CUI Xia, DU Haiming, XU Yong. Properties of TiC Reinforced Ti-Composites Synthesized in Situ by Microwave Sintering. Chinese Journal of Materials Research, 2021, 35(4): 277-283.
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Abstract Novel TiC reinforced Ti-based composites were synthesized via in situ microwave sintering with nanotubes (MWCNTs) and pure Ti as raw materials. The properties of the composites were investigated, and the formation mechanism of TiC reinforced phase of the composites was discussed. The results show that TiC reinforced phase could be generated in-situ in the Ti-matrix during microwave sintering. When the addition amount of MWCNTs <1% (in mass fraction), the formed TiC was granular-like and distributed uniformly in the dense Ti matrix of fine grains. When the addition amount of MWCNTs >1.5%, the formed TiC turns to be of dendritic morphology, while the Ti matrix is coarsened and the composite becomes porous. Sequentially, the wear mechanism of the composites will change from adhesive wear to abrasive wear due to the addition of MWCNTs. With the increasing addition amount of MWCNTs the microhardness of the composite increases firstly and then decreases. When the addition amount of MWCNTs is 1%, the acquired composite presents a higher microhardness of about 527HV and better wear resistance with the friction coefficient of about 0.35, which are 1.2 times more and 0.4 less than the corresponding terms of the pure Ti respectively.
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Received: 18 May 2020
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Fund: National Natural Science Foundation of China(51761029) |
About author: OUYANG Delai, Tel: (0791)83863039, E-mail: ouyangdelai@163.com
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