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- W2367675843 abstract "Polycarbosilane (PCS) is the precursor of SiC ceramic fibers, and oxidation-curing process of PCS fibers is an essential step of making Nicalon style SiC fibers.The oxygen introduced into PCS fibers seriously affects the mechanical properties of SiC fibers at high temperature.In this paper,the probability whether PCS fibers can be thermal-cured without oxygen was investigated.It was found that a minimal degree of oxidation-curing of PCS fibers was necessary for their further thermal curing.Under these conditions the oxygen content of fibers decreases, and their properties can be improved.The mechanism of thermal-curing of low degree oxidation-curing PCS fibers and the function of oxygen were investigated.Results showed that the minimal degree of oxidation-curing was corresponding to a 9% weight gain of PCS fibers. During the thermal-curing process,the SiH of bonds PCS were mostly consumed and Si CH 2 Si structure was formed; Si OH was formed when a little oxygen was introduced into PCS fibers in the oxidation-curing process and may form SiO Si structure during further thermal-curing,making a protective layer on the surface of PCS fibers." @default.
- W2367675843 created "2016-06-24" @default.
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- W2367675843 date "2004-01-01" @default.
- W2367675843 modified "2023-09-22" @default.
- W2367675843 title "STUDY ON THERMAL-CURING OF POLYCARBOSILANE FIBERS" @default.
- W2367675843 hasPublicationYear "2004" @default.
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