中文摘要：

运用无压熔渗法制备了SiC/Al-Mg双连续相复合材料,研究了不同烧蚀时间对复合材料烧蚀性能的影响。研究表明,烧蚀时间为20 s时,试样表面没有出现明显的烧蚀坑,表现出较好的抗高温性能;烧蚀时间为40 s和60 s时,试样表面出现了明显的烧蚀坑,试样破坏严重。随着烧蚀时间的增加,试样表面温度急剧升高,合金快速挥发,烧结助剂发生熔化,导致试样破坏严重。

英文摘要：

The composite of SiC and Aluminum-Magnesium （A1-Mg） with double continuous phase were prepared by the method of non-pressure infiltration. The effect of different ablation time on the ablation performance of the SiC/Al-Mg composites was investigated. The result showed that the sample surfaces did not appear the obvious ablation pits as 20 s ablation time to get the better high temperature performance. And appeared obvious ablation pit on the surface of the samples as ablation time was 40 s and 60 s to dam- age seriously the sample. With increasing the ablation time, the surface temperature of the sample rapidly increased, and the alloy was quickly evaporated and the sintering aids melted to lead to seriouly the sample. damage