Investigation and Modeling of Sputtering Yield of Carbon/Carbon Composite

2014 Fiscal Year Final Research Report

• Project/Area Number: 24560981
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Aerospace engineering
• Research Institution: Tokyo Metropolitan College of Industrial Technology
• Principal Investigator: NAKANO Masakatsu 東京都立産業技術高等専門学校, ものづくり工学科, 准教授 (90315169)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: イオンエンジン / スパッタリング / カーボン・カーボン複合材 / キセノン

Outline of Final Research Achievements

The angular and energy dependence of the sputtering yield of carbon-carbon composite due to xenon ion bombardment was investigated. Instead of assuming surfaces to be flat, a simple carbon fiber distribution model was introduced to account for the carbon-carbon composite surface structure observed using a scanning electron microscope. Yamamura's semi-empirical sputtering formula, which accounted for 14% xenon adsorption, was used to calculate the sputtering yield of the carbon fiber surface. The proposed model provided fairly good estimates of the angular and energy dependence of the sputtering yield of carbon-carbon composite. Comparative analysis demonstrated that the proposed model most accurately predicted both the accelerator and decelerator grid mass changes in the mu10 PM ion engine endurance test.

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