238 高エネルギ原子状酸素による炭素系材料の劣化に関する研究(OS 先進材料の力学的特性と計測技術)

概要

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When carbon materials are exposed to the atmosphere in low earth orbit (LEO), surface erosion often occurs due to atomic oxygen bombardment. This paper presents an experiment of degradation on the ground. In the experiment, atomic oxygen produced at a plasma torch is accelerated fluid dynamically with working gas. Graphite, C/C composite and Si-C.C. (: Silicon impregnated C/C composite) were used as the target materials. The mass loss per unit area is approximately proportional to the exposure time. The eroded surfaces of materials were observed with SEM. In case of C/C composite, the matrix region erodes substantially more than carbon fiber. The mass loss of Si-C.C. is less than that of corresponding C/C composite and only the C/C composite region erodes deeply with almost no erosion in Si and SiC regions.
社団法人日本機械学会の論文
2000-11-24