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- Title
Influence of Carbon Source on Microstructural and Mechanical Properties of High-Performance Reaction-Bonded Silicon Carbide.
- Authors
Zhou, Yabin; Sha, Wenhao; Liu, Yingying; Lyu, Yinong; Huang, Yihua
- Abstract
Reaction-bonded silicon carbide (RBSC) has become an important structural ceramic with the benefit of being capable of preparing complex-shaped products. In order to fabricate high-performance RBSC, particle gradation of raw SiC combined with slip casting was used to prepare the porous preform before liquid silicon infiltration (LSI). The microstructural and mechanical properties of RBSC were compared by adding different amounts of carbon black (CB) content from 4 wt% to 10 wt%. Two pore structures with submicron and nano pores formed in the preform. As the amounts of carbon black increased, the mechanical properties improved and then suddenly weakened due to residual silicon initiating a nonuniform microstructure. The elastic modulus of the preform with 8 wt%CB after LSI was 389 ± 4 GPa and the flexural strength was 340 ± 17 MPa, which improved by about 150% compared to other rapid prototyping methods and has attractive application prospects.
- Subjects
SILICON carbide; SLIP casting; LIQUID silicon; POROSITY; RAPID prototyping; FLEXURAL strength; CARBON-black
- Publication
Materials (1996-1944), 2022, Vol 15, Issue 15, p5250
- ISSN
1996-1944
- Publication type
Article
- DOI
10.3390/ma15155250