Effect of Rolivsan MV-1 on the process of curing and pyrolysis of polycarbosilane PCS-M in argon and on the properties of the ceramic matrix being formed. Use of Rolivsan in polycarbosilane formulations provides effective curing of the latter to give network block-copolymers. Pyrolysis of the resulting precursors in the atmosphere of argon yields ceramic matrices, with the yield of these being 1.3–1.4 times that of the pyrolyzate of the starting components. A study of the elemental and phase composition demonstrated that the matrices belong to the class of amorphous ceramics of nonstoichiometric composition, which contain microcrystalline silicon carbide SiC. The ceramic obtained has a high thermo-oxidative stability (up to 1400°C) and changing the relative amounts of the starting oligomers enables a purposeful variation of its composition, temperature stability, and service characteristics of ceramic-matrix composite materials obtained on its basis by the “polymer technology.”
Russian Journal of Applied Chemistry – Springer Journals
Published: May 22, 2016
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