10113 ゾル-ゲル法によるC/C複合材料に対するSiCコーティング付与に関する研究(製造方法と強度,OS10 先進材料の力学と強度)

概要

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SiC ceramics are expected as oxidaton resistant coating maerial for Carbon/Carbon composites (C/C). In the present study, SiC ceramics were synthesized through Sol-Gel method with low environmental impact. The gels were synthesized from Ethylalcohol, methyltriethoxysilane (MTES), hydrochloric acid (HCI) and purified water (H_2O), and it was pyrolyzed at 1000, 1500 and 1700℃. The structures of gels after heat treatment, were analyzed with X-ray diffraction (XRD). XRD results indicated that β-SiC were obtained in the present method and crystallization was increased with increasing heat treatment temperature. There was little weight loss in synthesized SiC obtained at 1000℃ in air. This resulted in lower weight changes in SiC coated C/C were lower than in bare C/C. However, SiC coated C/C were also oxidized because of the generation of crack during heat treatment at 1000℃. Tensile Strength of SiC coated C/C were higher than bare C/C after 5minutes oxidation.
社団法人日本機械学会の論文
2005-03-17