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Thermal Stability of Low‐SiC Fiber (Hi‐Nicalon) Treated in a Hot Isostatic Press
Author(s) -
Shimoo Toshio,
Tsukada Ichiro,
Seguchi Tadao,
Okamura Kiyohito
Publication year - 1999
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.1151-2916.1999.tb02273.x
Subject(s) - argon , materials science , composite material , irradiation , hot isostatic pressing , fiber , thermal stability , metallurgy , microstructure , chemistry , physics , organic chemistry , nuclear physics
The low‐oxygen SiC fiber fabricated by the electron‐beam irradiation curing method, Hi‐Nicalon, was heated at 1773 to 2273 K in a hot isostatic press (800 MPa of argon) and was subsequently reheated at 1873 K at 1 atm (101 kPa) of argon. The hot isostatic press treatment delayed the onset of fiber deterioration to higher temperature. The fiber strength remained almost unchanged by subsequent reheating at 1873 K in 101 kPa of argon. The thermal stability of Hi‐Nicalon, as a consequence of the permanent change in surface structure, can be greatly improved by treating in the hot isostatic press.