N_2雰囲気下におけるアルミナ粉末中でのSi-C-O系繊維の熱分解挙動

概要

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In relation to the fabrication of the ceramics composite reinforced with Si-C-O fiber(Nicalon), the pyrolysis of Nicalon in alumina powder was investigated under an N_2 atmosphere at temperatures from 1773 to 1973 K. Using the Nicalon-alumina compacts, the pyrolytic rates were determined with a thermobalance. The heat-treated fibers were examined by X-ray deffractions and SEM observations. The pyrolytic behavior under an N_2 atmosphere was compared with that under an Ar atmosphere. The pyrolysis of Nicalon under an N_2 atmosphere was retarded by the nitrided layer at lower temperatures, while it was retarded by the alumina layer at higher temperatures. AIN was formed as the fiber-like deposites on the compact surface. In addition, Nicalon in alumina crystallized into α-SiC of type 2H as well as β-SiC.
社団法人日本セラミックス協会の論文
1996-03-01