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Citation: LUO Min, LI Yan, HOU Guang-Ya. Manufacturing of Wood Derived Biomorphic SiC Ceramics by Liquid Silicon Infiltration Processing[J]. Chinese Journal of Applied Chemistry, ;2009, 26(6): 1399-1403. shu

Manufacturing of Wood Derived Biomorphic SiC Ceramics by Liquid Silicon Infiltration Processing

LUO Min ^a,, ,
LI Yan ^b ,
HOU Guang-Ya ^c

1.
a Key Laboratory of Energy Resources and Chemical Engineering, Ningxia University, Yinchuan 750021;
2.
b Zhejiang Pharmaceutical College, Ningbo;
3.
c College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou

Corresponding author: LUO Min,
Received Date: 28 November 2008
Available Online: 24 March 2009
Fund Project: 国家重点基础研究发展计划“九七三”专项(2008CB617613) (2008CB617613)教育部科学技术研究重点(203143) (203143)教育部国家级大学生创新性实验(08L04) (08L04)宁夏自然科学基金(NZ0916)资助项目 (NZ0916)

Biomorphic porous Si/SiC ceramics were prepared by liquid silicon infiltration-reaction and subsequent removal of residual Si.The microstructure morphology and component analysis of the cellular Si/SiC were investigated by means of scanning electron microscopy and X-ray diffraction.The porosity and distribution of the pore diameter of porous Si/SiC were determined by mercury intrusion method.Results show that the resulting porous ceramic is composed of major crystal phase β-SiC and secondary phase residual free Si.The ceramic composite maintained the original morphology of the wood and exhibited a porosity of 16%~32% by controlling the for Si removal time.The Archimedes and three-point bending methods were used to test the apparent porosity and bending strength of porous SiC ceramic.The influences of the Si removal time on the final phase composition and mechanic properties of the formed biomorphic Si/SiC ceramic composite were analyzed.The formation mechanism of SiC was also discussed.
- porous silicon carbide ceramics,
- biotemplating,
- liquid silicon infiltration processing(LSIP),
- microstructure,
- mechanical property
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