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Microstructure and mechanical properties of reaction bonded B4C-SiC composites: The effect of polycarbosilane addition
Zhou, Yucai1,2,3; Ni, Dewei1,2; Kan, Yanmei1,2; He, Ping1,2; Dong, Shaoming1,2; Zhang, Xiangyu1,2
2017
发表期刊Ceramics International
ISSN02728842
卷号43期号:8页码:5887-5895
摘要Reaction bonded B4C-SiC composites were prepared by infiltrating silicon melt into porous B4C-SiC green preforms at 1500 °C in vacuum. The porous green preform was obtained from a mixture of polycarbosilane (PCS) and particle size graded B4C after pre-sintering at 1600 °C. For the first time, PCS was used to adjust the phase composition and microstructure of the reaction bonded boron carbide composites. It is indicated that the addition of PCS and its content has a significant influence on the microstructure as well as the mechanical properties of the subsequent reaction bonded B4C-SiC composites. For the B4C-SiC composite with 5 wt% PCS added, a flexural strength of 319±12 MPa, and an elastic modulus of 402±18 GPa can be achieved, which is 23% and 15% higher than those of the composite without PCS addition, respectively. While, with the higher content of PCS addition, the mechanical properties of the composites are decreased drastically due to the large amount of residual Si agglomeration in the composites. The reaction mechanisms as well as their microstructure evolution processes correlated with the mechanical properties of the reaction bonded B4C-SiC composites are further discussed in our work. © 2017
DOI10.1016/j.ceramint.2017.01.066
EI入藏号20170803369554
EI主题词Addition reactions
EI分类号549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 601.3 Mechanisms - 802.2 Chemical Reactions - 804.2 Inorganic Compounds - 815.1.2 Inorganic Polymers - 951 Materials Science
引用统计
被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.sic.ac.cn/handle/331005/25573
专题中国科学院上海硅酸盐研究所
作者单位1.State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai; 200050, China;
2.Structural Ceramics and Composites Engineering Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai; 200050, China;
3.University of Chinese Academy of Sciences, Beijing; 100049, China
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Zhou, Yucai,Ni, Dewei,Kan, Yanmei,et al. Microstructure and mechanical properties of reaction bonded B4C-SiC composites: The effect of polycarbosilane addition[J]. Ceramics International,2017,43(8):5887-5895.
APA Zhou, Yucai,Ni, Dewei,Kan, Yanmei,He, Ping,Dong, Shaoming,&Zhang, Xiangyu.(2017).Microstructure and mechanical properties of reaction bonded B4C-SiC composites: The effect of polycarbosilane addition.Ceramics International,43(8),5887-5895.
MLA Zhou, Yucai,et al."Microstructure and mechanical properties of reaction bonded B4C-SiC composites: The effect of polycarbosilane addition".Ceramics International 43.8(2017):5887-5895.
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