Pressureless Sintering of Boron Carbide with Al₂O₃ and SiC as Sintering Aids

Abstract:

The effect of Al₂O₃ and SiC as the sintering additives for pressureless sintering boron carbide (B₄C) was investigated. The aids were 10 wt% Al₂O₃ (10A), 10 wt% Al₂O₃ and 15 wt% SiC (10A15S), 10 wt% Al2O3 and 30 wt% SiC (10A30S), and 30 wt% SiC (30S) (all based on B₄C). The sintering behavior, microstructure evolution and phase compositions of the samples were studied. 10A15S and 10A30S can effectively enhance the densification of B₄C, comparing with 10A and 30S. The linear shrinkage rate of 14% for the 10A15S and 10A30S samples can be reached. The bending strength approaching 400MPa for the 10A30S sample sintered at 2170°C can be obtained.

• Periodical: Key Engineering Materials (Volumes 602-603)
• Pages: 202-207
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.602-603.202
• Online since: March 2014
• Authors: Xiao Guang Li*, Dong Liang Jiang, Jing Xian Zhang, Qing Ling Lin, Zhong Ming Chen, Zheng Ren Huang
• Keywords: Al₂O₃, B₄C, Boron Carbide, Silicon Carbide (SiC)

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