论文部分内容阅读
研究了ＬＳＭ 法制备 ＴｉＢ２ 粒子增强ＡｌＳｉ７ 复合材料的物相组成；考察了ＴｉＢ２ 粒子对热处理组织与性能的影响。研究结果表明，按Ｋ２ＴｉＦ６ ＋ ２ＫＢＦ４＝ ＴｉＢ２ ＋ ４ＫＦ＋ ５Ｆ２ 反应式计算，在ｗ （ＴｉＢ２）为５％ 时，在复合材料中可以生成稳定且均匀分布的ＴｉＢ２ 粒子，未发现ＴｉＡｌ３ 等相。材料的杨氏模量由７２．３ ＧＰａ 提高至９６．８ ＧＰａ。ＴｉＢ２ 粒子对热处理组织与性能无明显影响
The phase composition of TiB2 particles reinforced AlSi7 composites prepared by LSM method was investigated. The effect of TiB2 particles on the microstructure and properties of heat-treated AlSi7 composites was investigated. The results show that stable and uniform distribution of TiB2 particles can be obtained in the composites at 5% w (TiB2) according to K2TiF6 + 2KBF4 = TiB2 + 4KF + 5F2 reaction equation. No TiAl3 phase is found. The Young’s modulus of the material increased from 72.3 GPa to 96.8 GPa. TiB2 particles have no obvious effect on the microstructure and properties of heat treatment