磁兼容Au-25Pt合金的组织结构及综合性能  

Microstructure and comprehensive properties of MR-compatible Au-Pt alloy

作　　者：付全 马丽华 刘毅[1] 王顺 张健康[1] 牛海东 武海军[1] 陈登权[1] FU Quan;MA Li-hua;LIU Yi;WANG Shun;ZHANG Jian-kang;NIU Hai-dong;WU Hai-jun;CHEN Deng-quan(Kunming Institute of Precious Metals,State Key Laboratory of Advance Technologies for Comprehensive Utilization of Platinum Metals,Sino-Platinum Metals Co.Ltd.,Kunming 650106,China;Key Laboratory of Fundamental Physical Quantities Measurement,School of Physics,Huazhong University Science and Technology,Wuhan 430074,China)

机构地区：[1]昆明贵金属研究所,贵研铂业股份有限公司稀贵金属综合利用新技术国家重点实验室,昆明650106 [2]华中科技大学物理学院基本物理量测量教育部重点实验室,武汉430074

出　　处：《贵金属》2022年第2期31-35,共5页Precious Metals

基　　金：国家自然科学基金联合基金(U20A2077);云南省基础研究计划青年基金(202101AU070123);云南省重大科技专项(202002AB080001-1)。

摘　　要：Au-Pt合金具有优异的MRI磁兼容性、良好的生物兼容性、高的耐蚀性等优点,在医用材料领域具有巨大的应用前景。采用X射线衍射仪、金相显微镜、维氏显微硬度仪和综合物性测量系统等,研究冷加工过程Au-25Pt合金丝材的组织结构演变及其对体积磁化率和维氏硬度的影响,为制备综合性能优异的Au-Pt合金探索有效途径。结果表明,固溶处理后的Au-25Pt合金为面心立方结构的单相固溶体,经30%~70%冷变形后,没有其它相产生。冷加工变形显著增加了Au-25Pt合金的维氏硬度,尤其在冷加工初期(<30%变形量),但对磁化率影响很小。冷变形Au-25Pt合金不仅具有接近人体组织的体积磁化率(−8.5×10^(−6)),还有较高的维氏硬度(HV0.1=160)。Au-Pt alloy has great application prospects in the field of biomedical materials due to its advantages of excellent MR-compatibility,good biocompatibility and high corrosion resistance,etc.Its microstructure evolution and its effect on bulk magnetic susceptibility and hardness of Au-25Pt alloy wire during cold deformation were studied by X-ray diffraction(XRD),metallographic microscope,Vickers microhardness tester and comprehensive physical properties measurement system,and effective ways to prepare Au-Pt alloy with excellent comprehensive properties were explored.The results show that the Au-25Pt alloy is a single-phase solid solution with a face centered cubic structure after solution treatment,and that no other phase forms during 30%~70%cold deformation.Cold deformation significantly increases the Vickers hardness of Au-25Pt alloy,especially at the initial stage of cold deformation(<30%),but has little effect on the magnetic susceptibility.The cold-deformed Au-25Pt alloy not only has a volume magnetic susceptibility of−8.5×10^(−6) which is close to that of human tissue,but also has a higher Vickers hardness(HV0.1=160).

关 键 词：金属材料 Au-Pt合金 冷变形 相结构 磁化率 硬度 

分 类 号：TG146.3[一般工业技术—材料科学与工程]