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MATERIALS SCIENCE FORUM · 2019 · IF 0

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

Ke Jia Kang,Peng Fan,Jian Zhang,Qiang Guo Luo,Qiang Shen,Lian Meng Zhang

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.

研究领域: 材料科学 · 机械工程

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International Journal of Applied Ceramic Technology · 2023 ·Vol. 20 ·期 3 ·1919-1927 · IF 2.1

Mechanical properties of B4C–CrB2 binary eutectic composites prepared by arc-melting

Rong Tu,Jiaojiao Li,Mingpu Jia,Qizhong Li,Meijun Yang,Song Zhang,Takashi Goto

B 4 C–CrB 2 composites were prepared by arc-melting using B 4 C and CrB 2 powders as raw materials. The eutectic composition of B 4 C–CrB 2 system was 30B 4 C–70CrB 2 (mol%) with a labyrinth-like irregularly layered eutectic microstructure, composed of B 4 C phase about 1–2 μm in thickness dispersing in CrB 2 matrix, much smaller than raw powders. The interface of the eutectic composite was well bonded, and there were edge dislocations at the interface to alleviate the interface mismatch. The eutectic temperature of B 4 C–CrB 2 composites was approximately 2200 K. At the eutectic composition, the B 4 C–CrB 2 composites showed the maximum Vickers hardness (24.6 GPa) and fracture toughness (4.3 MPa m 1/2 ) at room temperature.

CAS / MDL: 12069-32-8 12006-80-3

研究领域: 材料科学 · 机械工程

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