Abstract
SiC/C composites were prepared from a mixture of polycarbosilane and phenolic resin with weight ratio of 2/1 and 1/1 using PVB as a binder. The two types of green bodies which were formed by mould pressing method were treated in the temperature range from 1,000‡C to 1,500‡C under nitrogen. X-ray diffraction patterns, density, flexural strength and fracture surfaces of the composite were examined. The flexural strength of the composites at room temperature increased with heattreatment temperature and showed a maximum value of 175 MPa at 1,300‡C. When the composite was heat treated at 1,400‡C, the flexural strength decreased rapidly due to the crystallization of SiC. The SiC/C composites showed good oxidation resistance up to 830‡C. The effective mixing ratio of PCS/phenolic resin to obtain improved mechanical property was 2/1.
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Kang, PH., Yang, HS. Preparation of SiC/C composite sheet from polycarbosilane/carbon-based resin mixture. Korean J. Chem. Eng. 15, 580–584 (1998). https://doi.org/10.1007/BF02698981
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DOI: https://doi.org/10.1007/BF02698981