摘要
研究了石墨与硅之比对石墨铝硅复合材料综合性能的影响．解决了石墨颗粒直接加入铝硅熔体中的难点，并基本解决了石墨加入的均匀性问题．研究表明：石墨与硅生成一定量的ＳｉＣ，对提高石墨铝硅的高温抗拉强度十分有利；石墨与铝生成Ａｌ４Ｃ３有利于石墨在铝硅熔体中的均匀分布；生成Ａｌ４Ｃ３的量不宜过多，不能给石墨与硅生成碳化硅的比例带来影响．否则。
This paper shows that graphite can be added into the melted Al Si alloy directly and the added graphite is distributed homogeneously. The effect of the graphite to silicon ratio on the complex properties of graphite Al Si composite is discussed. The ratio of graphite and silicon includes the strict ratio of graphite and silicon carbide, as well as the ratio of free graphite and total amount of silicon.Some SiC was formed due to the reaction between graphite and silicon, which was useful for the improvement of the high temperature tensile strength of the Graphite Al Si material.The formation of Al 4C 3 from aluminium and graphite could improve the uniformity of the distribution of graphite in Al Si melt. The amount of Al 4C 3 should be controlled so that no negative effects result from the excessive Al 4C 3 formation.
出处
《中南工业大学学报》
CSCD
北大核心
1999年第2期189-191,共3页
Journal of Central South University of Technology(Natural Science)
