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Foreign Object Damage Resistance of Silicon Nitride and Silicon Carbide
Author(s) -
Tsuruta Hideyoshi,
Masuda Masaaki,
Soma Takao,
Matsui Minoru
Publication year - 1990
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.1151-2916.1990.tb09818.x
Subject(s) - flexural strength , materials science , fracture (geology) , projectile , silicon carbide , composite material , ceramic , silicon nitride , metallurgy , layer (electronics)
To clarify the foreign object damage (FOD) resistance of ceramics, chipping fracture mode and flexural fracture mode were investigated using several types of Si 3 N 4 and Sic. The critical velocity which is the threshold impact velocity of the projectile for chipping fracture and flexural fracture was determined. The critical velocity of the chipping fracture mode is explained as a function of K 5/2 IC a –5/4 , and depends on the hardness and the shape of the projectile. The critical velocity of the flexural fracture mode is explained as a function of σ 5/6 C t 5/3 . The mechanisms of impact damage are discussed.