Effect of Sintering Temperature on Microstructure and Mechanical Properties of ZrB2-ZrC-W2Zr Composites Prepared by Reactive Hot-pressing Method
DONG Shanliang1, HUO Sijia2, ZHEN Shuying2, ZHANG Yumin1, WANG Yujin2
1 Center for Composite Materials and Structure, Harbin Institute of Technology, Harbin 150080; 2 Institute for Advanced Ceramics, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080
Abstract: ZrB2-ZrC-W2Zr composites were fabricated by reactive hot-pressing method via chemical reaction of B4C, Zr and W powders. The effect of sintering temperature on the microstructure and mechanical properties of the composites was investigated. As a result, the composites were composed of ZrB2, ZrC, W2Zr and a spot of W phase. With the sintering temperature increased from 1 600 ℃ to 1 900 ℃, the content of W increased slightly while W2Zr slightly reduced, the morphology of ZrB2 led to a change of needle-like to lath-like, the average size of grains increased while the aspect ratio decreased. The flexural strength and fracture toughness firstly increased and then decreased depending on the sintering temperature. The maximum values of 560 MPa and 5.5 MPa·m1/2 were reached at 1 850 ℃.
董善亮,霍思嘉,甄淑颖,张宇民,王玉金. 烧结温度对反应热压烧结制备ZrB2-ZrC-W2Zr复合材料组织和力学性能的影响[J]. 《材料导报》期刊社, 2018, 32(12): 1994-1997.
DONG Shanliang, HUO Sijia, ZHEN Shuying, ZHANG Yumin, WANG Yujin. Effect of Sintering Temperature on Microstructure and Mechanical Properties of ZrB2-ZrC-W2Zr Composites Prepared by Reactive Hot-pressing Method. Materials Reports, 2018, 32(12): 1994-1997.
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2018, Vol. 32 
