低压烧结制备多孔NiTi形状记忆合金的结构及性能  

Stucture and Properties of Porous NiTi Shape Memory Alloys Fabricated by Low Pressure Sintering

作　　者：李浩[1] 袁斌[1] 高岩[1] 钟志源[2] 朱敏[1] 

机构地区：[1]华南理工大学机械工程学院,广东广州510640 [2]香港城市大学材料与物理系,中国香港九龙

出　　处：《机械工程材料》2008年第11期53-56,共4页Materials For Mechanical Engineering

基　　金：国家自然科学基金资助项目(50701019);广东省自然科学基金资助项目(2005团队项目);中国博士后科学基金资助项目(20060390199)

摘　　要：采用低压烧结法制备了多孔NiTi形状记忆合金；研究了在1050℃下烧结不同时间所制备合金的结构及性能，并与常规粉末烧结方法制备的合金进行了比较。结果表明：低压烧结法在短时间内制备合金的孔隙可控性好，孔径主要分布在50-200um之间，孔隙相互连通，呈网状分布，无明显各向异性；同时表现出良好的力学性能和超弹性能。Porous NiTi shape memory alloys（SMAs） were successfully prepared by low pressure sintering （LPS）. The structure and properties of the porous NiTi SMAs sintered for different times were studied and compared with those of samples fabricated by vacuum sintering. The resucts show that the porous NiTi SMAs produced by LPS with three-dimensionally interconnected pores had the isotropic pore structure, whose pore size was about 50-200um The porous NiTi SMAs produced by LPS also exhibited good mechanical properties, such as superior superelasticity and a higher compressive strength.

关 键 词：NITI形状记忆合金 低压烧结 超弹性 孔隙 

分 类 号：TG113[金属学及工艺—物理冶金] TG139[金属学及工艺—金属学]