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Tribological Behavior of a Si3N4/Carbon Short Fiber Composite under Water Lubrication

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The tribological behavior of monolithic Si3N4 and a Si3N4/carbon fiber composite has been assessed under high load and low speeds in an aqueous environment. The results showed that the friction coefficient of the Si3N4 was not significantly reduced when compared with dry sliding, and this was attributed to the failure to maintain a lubricating layer between the solid–solid surfaces. In the case of the composite, the initial high friction coefficient was reduced shortly after the beginning of the wear test and maintained a low value (about 0.03) throughout. This was attributed to the solid lubricating effect of the composite resulting in lower stress at the contact asperities, preventing the removal of the lubricating layer.
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Keywords: composites; silicon nitride; water

Document Type: Research Article

Affiliations: 1: Fine Ceramics Research Association, 2268-1 Shimo-shidami, Moriyama-ku, Nagoya, Aichi, 463-8687, Japan 2: Synergy Materials Research Center, National Institute of Advanced Industrial Science and Technology (AIST), 2268-1 Shimo-shidami, Moriyama-ku, Nagoya, Aichi, 463-8687, Japan

Publication date: April 1, 2004

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