LSM法制备TiB_2/Al-7Si复合材料的研究

Research on TiB\-2/Al 7Si Composite Fabricated by LSM Method

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

The TiB\-2/Al 7Si composite was fabricated by LSM method.The phase analysis of the composite was carried out by XRD. The effect of TiB\-2 particulate on heat treated properties and structures was examined. The results showed that TiB\-2 particulates distribute in the composite stably and homogeneously with nominal w (TiB\-2)=5% addition calculated by K\-2TiF\-6+2KBF4=TiB2+4KF+5F\-2.No phase as TiAl\-3 has been found. Young′s modulus increaes from 72.3 GPa to 96.8 GPa. TiB\-2 particulates have no obvious effects on the heat treated structure and properties.