摘要
对自熔性镍基合金和TiH2的混合粉末进行了激光烧结实验,并采用XRD、SEM、EDX等分析手段对烧结试样的微观组织结构进行了表征,对试样中的孔结构及析出相的成形机制进行了初步探讨。结果表明,烧结后试样中存在原位增强相TiC、TiB2和孔结构;大量微米级尺寸的圆孔以及呈放射状或针叶状的高温强化相CrB均匀分布于基体中。
The laser sint alloy and TiH2. The mi formation mechanisms cussed. In the sintered ering experiment was carried out on the powder mixture of self-melting nickel-based crostructure of sintered samples was characterized by XRD,SEM and EDX. And the of porous structure and precipitated phase in sintered samples were simply dis samples, the reinforcing phases TiC and TiBz are in-situ synthesized and structure is also formed. A large number of micron-sized pores are uniformly dispersed in the matrix as the high-temperature strengthening phase CrB with a radial or acicular-lobate shape. porous as well
出处
《稀有金属与硬质合金》
CAS
CSCD
北大核心
2009年第4期11-14,25,共5页
Rare Metals and Cemented Carbides
关键词
激光烧结
原位增强
多孔结构
镍基合金
TiH2
复合材料
laser sintering
in-situ reinforcement
porous structure
nickel-based alloy
TiH2
composite
