Thermal Stability of Low-SiC Fiber (Hi-Nicalon) Treated in a Hot Isostatic Press |
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| Authors: | Toshio Shimoo Ichiro Tsukada Tadao Seguchi Kiyohito Okamura |
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| Affiliation: | Department of Metallurgy and Materials Science, College of Engineering, Osaka Prefecture University, Sakai, Osaka, 599-8531, Japan |
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| Abstract: | 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. |
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