Synthesis of homogeneous carbon-onion and application to friction control

2015 Fiscal Year Final Research Report

• Project/Area Number: 25249010
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Design engineering/Machine functional elements/Tribology
• Research Institution: The University of Tokyo
• Principal Investigator: Kato Takahisa 東京大学, 工学(系)研究科(研究院), 教授 (60152716)
• Co-Investigator(Kenkyū-buntansha): CHOI JUNHO 東京大学, 大学院工学系研究科, 准教授 (30392632) ; KAWGUCHI MASAHIRO 地方独立行政法人東京都立産業技術研究センター, 主任研究員 (40463054)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: カーボンオニオン / 摩擦制御 / 熱処理 / CNPクラスタ / 水素雰囲気

Outline of Final Research Achievements

Purpose of this project is to produce high density carbon onion films by optimizing the formation process of silver film, injecting process of carbon ions and thermal process. In particular, effects of parameters of injection process are investigated and injection mechanism of carbon ions are clarified. It was found that the carbon onion particles grow to 20 nm in diameter, but do not grow any more, namely homogeneous size of carbon onion particles are produced in large numbers, and that the density of particles can be changed by controlling the thermal process and temperature. It was also found the final thermal process can evaporate the silver atoms and the film made of only carbon particles can be produced. It was shown that the CNP film exhibits superlubricity, i.e. friction coefficient smaller than 0.01, under the hydrogen gas conditions.

Free Research Field

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