Mass spectrometry during C/C composite friction: carbon oxidation associated with high friction coefficient and high wear rate

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• 作者：Gouider ; M. ; Berthier ; Y. ; Jacquemard ; P. ; Rousseau ; B. ; Bonnamy ; S. ; Estrade-Szwarckopf ; H.
• 关键词：Tribology ; C/C composite ; Friction ; Wear ; C oxidation ; Mass spectrometry
• 刊名：Wear
• 出版年：2004
• 出版时间：June, 2004
• 年：2004
• 卷：256
• 期：11-12
• 页码：1082-1087
• 全文大小：359 K

文摘

The friction of C/C composites has been studied using a pin-on-disc tester equipped with a mass spectrometer allowing the gas exchange analysis in the contact. An oxidation of the contact regions and/or wear particles is detected by a release of CO₂ associated with a consumption of O₂. It starts when a transition from low to high friction and dusting regime occurs. The water vapor role in this oxidation mechanism is more complex. The change of friction coefficient appears at a relatively low bulk temperature (<300°C) and oxidation is maintained as long as friction and wear remain high.