Journal
WEAR
Volume 253, Issue 11-12, Pages 1188-1193Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/S0043-1648(02)00250-8
Keywords
self-lubrication; composite ceramics; impregnation; solid lubricant
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Two kinds of composite ceramics are obtained by impregnating the porous SiC with melted fluorides and nickel. Using a pin-on-disk tribometer, the unlubricated tribological properties at temperatures of 15, 300 and 600degreesC are investigated for the composite ceramics. The results show that the composite ceramics exhibit self-lubricating property at 600degreesC. Meanwhile, micro-fracture on the worn surface is observed by SEM analysis. It is considered that the micro-fracture makes the lubricants in holes emerged and operated on the friction surface. Finally, the factors influencing the self-lubricating properties of the composite ceramics are discussed. (C) 2002 Elsevier Science B.V. All rights reserved.
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