Article ID Journal Published Year Pages File Type
819053 Composites Part B: Engineering 2012 5 Pages PDF
Abstract

Corrosion of a C/SiC composite has been investigated in the atmosphere containing oxygen, water vapor and sodium sulfate vapor at the temperatures range from 1000 to 1500 °C. The effect of water vapor on the corrosion mechanism of C/SiC were discussed based on the weight change, the residual strength change, the microstructure and calculated results from FactSage. The corrosion of C/SiC is attributed to (i) the permeation of gas through the SiO2 film below 1300 °C, (ii) the diffusion of oxidant through pores caused by bubbles broken in the SiO2 film above 1300 °C. The water vapor does not change the corrosion mechanism of C/SiC composite but the temperature range in which the corrosion mechanism works by accelerating the oxidation of SiC and the corrosion of SiO2.

Related Topics
Physical Sciences and Engineering Engineering Engineering (General)
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