【作者】 殷小玮； 成来飞； 张立同； 徐永东；

【Author】 Yin Xiaowei Cheng Laifei Zhang Litong Xu Yongdong (State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, P.R . China)

【机构】 西北工业大学凝固技术国家重点实验室；

【摘要】 为了提高三维C/SiC复合材料的力学性能和抗氧化性能,采用电沉积Cr与Si渗法相结合的工艺填充CVI SiC复合材料内部的孔隙。通过这种方法,不仅可以填充纤维束之间的大孔隙,而且可以填充纤维之间的小孔隙。C/SiC-Cr-Si复合材料表现出优良的力学性能和抗氧化性能,在1300℃燃气中氧化20h后强度仅降低了4.3%。更多还原

【Abstract】 Electrodeposition chromium combined with silicon melt infiltration method (CSI) is developed to improve the mechanical properties and oxidation resistance of carbon fiber-reinforced silicon carbide composites. By this method, not only the large pores between bundles but also the small pores between fibers in a bundle can be filled. C/SiC-Cr-Si composites exhibit better mechanical property and oxidation resistance. After the CVI C/SiC-Cr-Si composite is exposed in the flame of burner rig for 20 h at 1300℃, the flexural strength of composite decreases only by 4.3%.更多还原