Super low to high friction of turbostratic graphite under various atmospheric test conditions

被引：48
|
作者：
Kumar, N. [1 ]
Dash, S. [1 ]
Tyagi, A. K. [1 ]
Raj, Baldev [1 ]
机构：
[1] Indira Gandhi Ctr Atom Res, Surface & Nanosci Div, Mat Sci Grp, Kalpakkam 603102, Tamil Nadu, India
来源：
TRIBOLOGY INTERNATIONAL | 2011年 / 44卷 / 12期
关键词：
Tribology; Turbostratic graphite; Test environment; Dangling bonds; TRIBOLOGICAL PROPERTIES; DUSTING WEAR; WATER-VAPOR; ENVIRONMENT; BEHAVIOR; MECHANISMS; ADSORPTION; CARBONS; ENERGY;
D O I：
10.1016/j.triboint.2011.08.012
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Mechanism behind manifestation of high and super low values of friction coefficients in turbostratic graphite during tribology tests carried out under nitrogen and argon exposures is investigated. Super low value in argon environment is attributed to self-organization and superficial mobility of crystallites at contact interface whereas similar tests under nitrogen atmosphere revealed high friction due to accumulation of dangling bonds generated by fractured surfaces. In ambient atmospheric conditions, coefficient of friction is found to systematically decrease with increase in relative humidity. Increase in relative humidity provides passivation of interacting dangling bonds on the sliding surface. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1969 / 1978
页数：10
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