Porous nickel–titanium alloy prepared by gel-casting  

作　　者：Bo-Hua Duan Hai-Xia Hong De-Zhi Wang Hui-Jiang Liu Xiao-Jia Dong Dan-Dan Liang 

机构地区：[1]School of Materials Science and Engineering,Central South University [2]State Key Laboratory of Powder Metallurgy,Central South University

出　　处：《Rare Metals》2014年第4期394-399,共6页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.51274246);the Project Supported by State Key Laboratory of Powder Metallurgy of China(No.26358766)

摘　　要：To explore the preparation of porous nickel- titanium alloy with excellent properties, larger size and complex shape, the premixed powder of Ni and Ti with atomic ratio of 1：1 was shaped by gel-casting. The effects of solids loading and the content of dispersant on flow ability of nickel-titanium slurry and the mechanical properties of nickel-titanium sintered body were studied. The drying models under different solids loading were also discussed. The results show that the viscosity of slurries significantly increases with an increase in solids loading. After a proper process of drying, the green body with complex shape is obtained. The sintered body with porosity rate reaching up to 49.5 % and compression strength reaching to 364.74 MPa could meet the basic demands of implant materials.To explore the preparation of porous nickel- titanium alloy with excellent properties, larger size and complex shape, the premixed powder of Ni and Ti with atomic ratio of 1：1 was shaped by gel-casting. The effects of solids loading and the content of dispersant on flow ability of nickel-titanium slurry and the mechanical properties of nickel-titanium sintered body were studied. The drying models under different solids loading were also discussed. The results show that the viscosity of slurries significantly increases with an increase in solids loading. After a proper process of drying, the green body with complex shape is obtained. The sintered body with porosity rate reaching up to 49.5 % and compression strength reaching to 364.74 MPa could meet the basic demands of implant materials.

关 键 词：GEL-CASTING Porous nickel-titanium alloy Solids loading DRYING 

分 类 号：TG146.15[一般工业技术—材料科学与工程] TB383.4[金属学及工艺—金属材料]