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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
Source PublicationCeramics International
ISSN02728842
Volume43Issue:8Pages:5887-5895
AbstractReaction 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 Accession Number20170803369554
EI KeywordsAddition reactions
EI Classification Number549.3 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
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Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/25573
Collection中国科学院上海硅酸盐研究所
Affiliation1.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
Recommended Citation
GB/T 7714
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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