Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7973836 | Materials Science and Engineering: A | 2018 | 27 Pages |
Abstract
In this work, to improve the strain capacity of tungsten, β-SiC was added to form W-Si-C multi-phase composites composed of W, W2C, and W5Si3 using the arc-melting method. The relationship between microstructure and mechanical behavior was investigated, and a microstructural evolution mechanism was proposed. The grain size of the W was refined significantly from 1071.8 to 5.4 µm as the SiC content increased. The micro-hardness (3.67-12.79 GPa) and ultimate compressive strength (UCS) (0.90-2.29 GPa) of the W-Si-C multi-phase composite obviously increased as the β-SiC content increased to 4 wt% due to the grain refinement and segregation of the W2C and W5Si3 at the grain boundaries. The highest strain of UCS (21.9%) was obtained at 1 wt% SiC, which is three times of that of pure W (7.4%) and is a result of the refined W grain size and the potentiation of W5Si3.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Kejia Kang, Lianmeng Zhang, Guoqiang Luo, Jian Zhang, Rong Tu, Chuandong Wu, Qiang Shen,