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The change in composition of the surface layer of beta-Si3N4 whiskers was examined after heat treatment in atmosphere. At 873 K, the beta-Si3N4 whisker was barely oxidized. At 1273 K, the oxidation of the surface layers of the whisker occurred easily. With the beta-Si3N4 oxidation, the Si-N bond gradually changed into the Si-N-O bond, and finally became the(More)
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