Si－C－O－N系统相稳定性及制备C－SiC纤维和SiC涂层的研究

PHASE STABILITY IN THE Si-C-O-N SYSTEM AND THE PREPARATION OF C-SiC FIBERS AND SiC COATING ON CARBON FIBERS

根据Ｓｉ－Ｃ－Ｏ－Ｎ系统的相稳定性计算，绘制了于平衡状态下相稳定性与Ｎ＿２分压和Ｏ＿２分压以及相稳定性与Ｎ＿２分压和ＳｉＯ分压的关系图，发展了以气态ＳｉＯ与碳纤维反应将碳纤维转变为ＳｉＣ纤维，以及气态ＳｉＯ与ＣＯ反应于碳纤维上形成ＳｉＣ涂层的新方法。本文介绍这两种方法的工艺原理和主要实验结果。

Based on the calculation of the phase stability in the equilibrium state for the Si-C-O-N system, the phase stability diagrams were constructed with the stability as a function of nitrogen and oxygen partial pressures, and of nitrogen and silicon monoxide partial pressures when the carbon activity equals 1.The method for preparing C-SiC fibers by the reaction of silicon monoxide with the carbon fibers and the method for forming SiC coating on the carbon fibers were developed. The processing principles and the main experimental results are described briefly in this paper.