摘要
用LSM法制备了TiB2/Al复合材料,用XRD、SEM和图像分析软件考察了净化方式、冷却速度对复合材料相组成、TiB2颗粒分布的影响。结果表明:熔剂法精炼对复合材料中TiB2颗粒的分布无明显影响,精炼后TiB2含量基本保持不变;而浮游法精炼后未检测到TiB2颗粒,即普通铝合金采用的浮游法精炼工艺不适于复合材料的精炼;随着冷却速度加大,复合材料凝固组织细化,TiB2颗粒分布趋于均匀,颗粒团聚减少。
A TiB2/Al composite was synthesized by LSM method. The effect of purification method and cooling rate on the phase and the distribution of TiB2 particulates in TiB2/Al composite was analysed by means of XRD, SEM and image analysis. The flux refinement processes had no significant effect on the distribution of TiB2 in TiB2/Al composite and the content of TiB2 particulates remained the same after refined. However, inert gas refinement processes had a significant effect and TiB2 particulates were not found. That is to say, inert gas refinement processes which are adapted for conventional aluminum alloys are not suitable for the composites; With the increasing of the cooling rate, solidification microstructure became finer, the distribution of TiB2 particulates became more homogenous, and the agglomerated TiB2 particulates decreased.
出处
《机械工程材料》
CAS
CSCD
北大核心
2006年第2期25-28,共4页
Materials For Mechanical Engineering
基金
广西自然科学基金资助项目(桂自科0007018)
