Development of Ti-26Nb-1.2TiC shape memory composite for biomedical applications  

作　　者：Quanxiang Sun Dechuang Zhang Xian Tong Jianguo Lin Jixing Lin Yuncang Li Cuie Wen 

机构地区：[1]School of Materials Science and Engineering,Xiangtan University,Xiangtan 411105,China [2]Key Laboratory of Low Dimensional Materials&Application Technology,Xiangtan University,Ministry of Education,Hunan 411105,China [3]Institute of Stomatology,School and Hospital of Stomatology,Wenzhou Medical University,Wenzhou 325027,China [4]School of Engineering,RMIT University,Melbourne,Victoria 3001,Australia

出　　处：《Journal of Materials Science & Technology》2023年第22期128-138,共11页材料科学技术（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos.51971190 and 11872053);support for this research by the Australian Research Council (ARC)through the Discovery Project (No.DP210101862);Future Fellowship (No.FT160100252).

摘　　要：Ti-Nb alloys have great potential in biomedical applications as bone-implant materials due to their low elastic modulus,superelasticity,high corrosion resistance,and good biocompatibility.However,the low yield strength and poor superelasticity of Ti-Nb alloys restrict their practical clinical applications.Here,we report the mechanical properties and superelasticity,corrosion behavior,and biocompatibility of a Ti-26 at.%Nb-1.2 vol.%TiC(Ti-26Nb-1.2TiC)shape memory composite(SMC)prepared by vacuum arc melting and hot rolling.The yield strength,critical stress for inducing martensitic transformation,and elongation of the Ti-26Nb-1.2TiC SMC and a Ti-26Nb alloy were 460 and 337 MPa,251 and 115 MPa,and 27.2%and 24.1%,respectively.The recovery rate of the SMC under 4%pre-strain reached 91.4%,which was 1.2 times that of the Ti-26Nb.Electrochemical tests in Hanks’solution revealed that the corrosion current density,passive current density,and corrosion rate of the SMC were lower than those of the Ti-26Nb.Both the Ti-26Nb alloy and Ti-26Nb-1.2TiC SMC showed good cell viability with grade 0 cytotoxicity in relation to MG-63 osteosarcoma cells.

关 键 词：Corrosion resistance CYTOTOXICITY Mechanical properties SUPERELASTICITY Ti-Nb alloy Ti-Nb-TiC shape memory composite 

分 类 号：TF12[冶金工程—粉末冶金] TB331[冶金工程—冶金物理化学]