期刊
MATERIALS RESEARCH EXPRESS
卷 5, 期 5, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/2053-1591/aac049
关键词
silicon carbonitride; self-propagation high-temperature synthesis; microindentation; fracture toughness
资金
- Foundation of Jiangsu University [17JDG018]
In this study, beta-Si-3(C-x,N1-x)(4) Silicon Carbonitride was prepared by Self-Propagation High-Temperature Synthesis (SHS). And the influence of carbon on structure stability, mechanical and tribological properties of beta-Si-3(C-x,N1-x)(4) were investigated. The results showed that the solubility of carbon in beta-Si-3(C-x,N1-x)(4) was about 10 wt%, beyond which cubic-SiC segregated out of beta-Si-3(C-x,N1-x)(4) to form beta-Si3N4/cubic-SiC composite. Regarding influences of carbon concentration on mechanical properties, the hardness of beta-Si-3(C-x,N1-x)(4) decreased from 1400 Hv to 1200 Hv with the increase of carbon concentration. Whereas, the fracture toughness of beta-Si-3(C-x,N1-x)(4) increased from 6.5 MPa.m(0.5) to 7.6 MP.m(0.5) with the increase of carbon concentration. The tribological property studies revealed the anti-wear performance of beta-Si-3(C-x,N1-x)(4) was enhanced by the increase of carbon concentration. The dominated wear mechanism could be attributed to the abrasive wear by fracture.
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