摘要
In this paper, Using TC4 and B4C powders as raw materials, TC4 matrix composites reinforced with different contents of TiB and TiC were prepared by spark plasma sintering (SPS). The sintered samples ware hot extruded. The effects of different contents of TiB and TiC on the microstructure and mechanical properties of TMCs and their high temperature mechanical properties were studied in situ reaction system of TC4-B4C. The results show that the in-situ TiC and TiB are firmly bonded with the matrix, TiC is like spherical particles, and TiB is like whisker. The reinforced phase in the matrix presents an obvious trend of three-dimensional network distribution along the boundary of primary particles. Compared with the unreinforced TC4 alloy, the matrix grain of the composite is significantly refined and there are high density dislocations, and the room temperature and high temperature properties of the titanium matrix composites are significantly improved. When the content of B4C is 0.5% at room temperature, the matrix has good connectivity and exhibits high strength (1246 MPa) and good elongation (12.7%). When the B4C content is 1.64% at 400 ℃, the tensile strength and elongation are 1112 MPa and 6.9%, respectively.
投稿的翻译标题 | Microstructure and mechanical properties of TiC+TiB reinforced TC4 matrix composites prepared by in-situ reaction of powder metallurgy TC4-B4C |
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源语言 | 繁体中文 |
页(从-至) | 1769-1783 |
页数 | 15 |
期刊 | Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals |
卷 | 33 |
期 | 6 |
DOI | |
出版状态 | 已出版 - 6月 2023 |
关键词
- 3D network microstructure
- mechanical property
- TiB
- TiC
- titanium matrix composites