Effect of SiC Additions on Microstructure Evolution and Mechanical Properties of W-Based Composite Prepared by Arc-Melting

Abstract:

In this study, the W-Si-C multi-phase composites were fabricated by an arc melting method. With addition of SiC, the grain size of W is obviously reduced, and the small angle misorientation becomes dominate, which is beneficial for the improvement of deformability. The effects of SiC additions (from 0.5 to 3wt%) on the microstructure and mechanical properties are mainly investigated. With 1 wt% SiC addition, the flexural strength reaches the highest value. The self-generation of W₅Si₃ may enhance the strength and ductility, but too much W₅Si₃ exists as brittle BP (Brittle to Plastic) microstructure. The highest flexural strength is obtained at approximately 1 vol% W₅Si₃.

• Periodical: Materials Science Forum (Volume 944)
• Pages: 531-536
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.944.531
• Online since: January 2019
• Authors: Ke Jia Kang, Peng Fan, Jian Zhang, Qiang Guo Luo*, Qiang Shen, Lian Meng Zhang
• Keywords: Arc-Melting, Flexural Strength, Microstructure, SiC, W

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