Oxidation of SiOC Composite Having Dispersoids of Mo4.8Si3C0.6 and MoSi2
New ceramic composites that consist of the amorphous SiOC matrix having dispersoids of Mo4.8Si3C0.6 and some MoSi2 were synthesized, and their oxidation characteristics were investigated between 450 and 1050oC in air. The SiOC matrix was obtained by converting polymethylsiloxane via pyrolysis. The good oxidation resistance of the prepared composites originated from a thin, protective SiO2 layer formed on the surface. But the outermost oxide surface was porous, owing to the formation of the highly volatile MoO3, which was formed together with SiO2.
Hyung Sun Kim, Sang-Yeop Park, Bo Young Hur and Soo Wohn Lee
D. B. Lee and S. W. Woo, "Oxidation of SiOC Composite Having Dispersoids of Mo4.8Si3C0.6 and MoSi2 ", Materials Science Forum, Vols. 486-487, pp. 165-168, 2005