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Mirror Constant for Tyranno ® Silicon‐Titanium‐Carbon‐Oxygen Fibers Measured in Situ in a Three‐Dimensional Woven Silicon Carbide/Silicon Carbide Composite
Author(s) -
Davies Ian J.,
Ishikawa Takashi
Publication year - 2002
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.1151-2916.2002.tb00151.x
Subject(s) - materials science , silicon carbide , composite material , composite number , ceramic , titanium , titanium carbide , silicon , carbide , carbon fibers , in situ , radius , metallurgy , chemistry , computer security , organic chemistry , computer science
The strength, S , of ceramic and glass fibers often can be estimated from fractographic investigation using the fracture mirror radius, r m , and the relationship S = A m /( r m ) 1/2 , where A m is the “mirror constant.” The present work estimates the value of A m for Tyranno ® Si‐Ti‐C‐O fibers in situ in a three‐dimensional woven SiC/SiC‐based composite to be 2.50 ± 0.09 MPa·m 1/2 . This value is within the range of 2–2.51 MPa·m 1/2 previously obtained for nominally similar Nicalon ® Si‐C‐O fibers.