Abstract
Thermal conversion of organic polymers such as polymethylsilane [(CH 3) 2Si] n, polymethylphenylsilane, and polysilazane or inorganic polymer such as silicimide [Si(NH) 2] n, and thermal and hydralylic decomposition of metal alkoxides, M(OR) n, have been employed to obtain submicron size 30–500 Å powders, continuous fibers and thin films of refractory carbides, nitrides and oxides. The high surface activity associated with these powders make possible relatively low temperature processing of the powders compact to near theoretical density and uniform fine grain size bodies. Transmission electron microscopy is used to show nucleation, growth crystallite morphology of the powders synthesized, and microstructural features observed.
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