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High‐Temperature Fracture Toughness of Sapphire
Author(s) -
Newcomb Stephen A.,
Tressler Richard E.
Publication year - 1994
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.1151-2916.1994.tb04542.x
Subject(s) - fracture toughness , sapphire , materials science , composite material , basal plane , tension (geology) , atmospheric temperature range , toughness , fracture (geology) , fracture mechanics , plane (geometry) , optics , crystallography , geometry , ultimate tensile strength , chemistry , thermodynamics , mathematics , laser , physics
The fracture toughness of sapphire with crack propagation parallel to the basal plane was measured from 1200° to 1500°C. Fracture surfaces of near c ‐axis fibers tested in tension were used to determine the values. The toughness was constant and equal to 1.4 ± 0.1 Mpa . m 1/2 over the entire temperature range.