摘要
The morphology and growth mechanism of borides in Ti 48Al+(0.2%～0.8%)B (mole fraction) alloys were investigated. The results show that TiB 2 phase are all flakes with width <0.5 μm and aspect ratio >100 in alloys containing 0.2% and 0.5%B, respectively, but there are a few hexagonal blocky borides with habit planes of (0001) and {1010} type besides flakes in the alloy containing 0.8%B. Flake borides are the products of irregular eutectic reactions growing coupled with matrix and blocky borides are primary TiB 2 phases growing unconstrained in melt.
The morphology and growth mechanism of borides in Ti-48Al+ (0.2% similar to 0.8%) B (mole fraction) alloys were investigated. The results show that TiB2 phase are all flakes with width <0.5 mu m and aspect ratio > 100 in alloys containing 0.2% and 0.5% B, respectively, but there are a few hexagonal blocky borides with habit planes of (0001) and {10 (1) over bar 0} type besides flakes in the alloy containing 0.8% B. Flake borides are the products of irregular eutectic reactions growing coupled with matrix and blocky borides are primary TiB2 phases growing unconstrained in melt.
出处
《中国有色金属学会会刊：英文版》
EI
CSCD
2000年第4期456-459,共4页
Transactions of Nonferrous Metals Society of China
