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Processing and Tribological Properties of Si 3 N 4 /Carbon Short Fiber Composites
Author(s) -
Hyuga Hideki,
Hirao Kiyoshi,
Jones Mark I.,
Yamauchi Yukihiko
Publication year - 2003
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2003.tb03428.x
Subject(s) - materials science , composite material , graphite , tribology , composite number , raman spectroscopy , fracture toughness , ceramic , fiber , friction coefficient , toughness , optics , physics
Si 3 N 4 /carbon fiber composites were fabricated using several types of fiber. All the composites had higher fracture toughness compared with monolithic Si 3 N 4 ceramics. Tribological properties were investigated by a ball‐on‐disk method under unlubricated conditions. The composite containing fibers with a high orientation of graphite layers and high graphite content indicated a low friction coefficient. It was identified, by Raman spectroscopy, that graphite was transferred from the composite to the Si 3 N 4 ball of the counterbody during the wear test. This transferred layer was effective for producing the low friction behavior of the composite.