工艺参数对热等静压法制备多孔NiTi记忆合金孔隙特性的影响  

Effect of Parameters on Pore Characteristics of Porous NiTi Shape Memory Alloys Fabricated by Hot Isostatic Pressing

作　　者：袁斌[1] 梁锦霞[1] 李星[1] 曾美琴[1] 高岩[1] 

机构地区：[1]华南理工大学机械工程学院,广东广州510641

出　　处：《机械工程材料》2008年第3期8-12,共5页Materials For Mechanical Engineering

基　　金：中国博士后科学基金资助项目(20060390199)

摘　　要：采用不封装的热等静压法来制备多孔NiTi形状记忆合金,着重研究了不同工艺参数对孔隙特性的影响规律。结果表明:采用烧结时间3 h制备出的多孔NiTi记忆合金能得到令人满意的孔隙特征,分别采用100 MPa和400 MPa的冷压压力能够制备出两种完全不同孔状结构的多孔NiTi记忆合金,一种是均匀分布的结构,另外一种则是层状结构(多孔层-致密层-多孔层);而且,随着热压压力的增加,孔隙特征参数减小。Porous NiTi shape memory alloys(SMAs) had been fabricated by capsule-free hot isostatic pressing(CF-HIP).The effect of processing parameters on pore characteristics was investigated emphatically.It is found that porous NiTi SMAs with satisfied pore characteristics should be fabricated by sintering for 3 h.Porous NiTi SMAs with two different pore structures are fabricated by adopting 100 MPa and 400 MPa cold pressures,respectively.One is the structure with homogeneous pore distribution.Another is the sandwic...

关 键 词：多孔NITI形状记忆合金 孔隙特性 热等静压 

分 类 号：TB381[一般工业技术—材料科学与工程]