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Tribological Behavior of Si 3 N 4 and Si 3 N 4 /Carbon Fiber Composites Against Stainless Steel Under Water Lubrication for a Thrust‐Bearing Application
Author(s) -
Hyuga Hideki,
Yoshizawa Yuichi,
Hirao Kiyoshi,
Amutha Rani D.,
Jones Mark I.
Publication year - 2008
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/j.1744-7402.2008.02178.x
Subject(s) - materials science , lubrication , tribology , composite material , ceramic , silicon nitride , composite number , fiber , carbon fibers , bearing (navigation) , friction coefficient , layer (electronics) , cartography , geography
The tribological behavior of Si 3 N 4 ceramics and Si 3 N 4 /carbon fiber composites sliding against stainless steel under water lubrication was investigated using a thrust‐bearing‐type test method with normal applied loads varying from 0 to 1000 N in 100 N increments. In the case of the monolithic Si 3 N 4 , the friction coefficient was found to increase up to 0.4 the first time the applied load was increased from 100 to 200 N, and sudden failure of the ceramic ring specimen occurred. In the case of the Si 3 N 4 /carbon fiber composite, a low friction coefficient was maintained up to the maximum normal load of 1000 N. The addition of the carbon fibers to the silicon nitride ceramics effectively restricts material transfer from the stainless steel to the Si 3 N 4 worn surface due to reduction of solid–solid contact through the solid lubricating effect of the carbon fibers.