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RESEARCH PAPERS

The Effect of Trialkyl Phosphites and Other Oil Additives on the Boundary Lubrication of Ceramics: Friction of Silicon-Based Ceramics

[+] Author and Article Information
Kei Demizu, Hideo Kakutani, Fukuzo Kobayashi

Osaka Prefectural Industrial Research Institute, Osaka, Japan

Hiroyuki Ishigaki

Kinki University, Osaka, Japan

J. Tribol 114(4), 653-658 (Oct 01, 1992) (6 pages) doi:10.1115/1.2920932 History: Received July 19, 1991; Revised June 01, 1992; Online June 05, 2008

Abstract

In order to examine the fundamental boundary lubrication properties of ceramics, reciprocating friction experiments of silicon based ceramics such as silicon carbide and silicon nitride were conducted with trialkyl phosphites and other oil additives. When ceramics were slid against ceramics, trialkyl phosphites with long carbon chains reduced the friction of silicon nitride markedly; the friction coefficients decreased with an increase in the carbon chain length. Other oil additives, however, did not greatly affect the friction. When ceramics were slid against metals, additives containing chlorine or sulfur increased friction of certain sliding couples. On the other hand, a trialkyl phosphite reduced friction and the friction coefficients increased with an increase in the maximum Hertzian contact pressure.

Copyright © 1992 by The American Society of Mechanical Engineers
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