(1. 广州有色金属研究院 粉末冶金研究所，广州510650；2. 华南理工大学 机械与汽车工程学院，广州 510640)
摘 要: 研究微量 Fe含量对Ti-Nb-Zr-Ta-Fe合金体系的非晶形成能力和热稳定性影响。利用机械合金化方法合成(Ti69.7Nb23.7Zr4.9Ta1.7)100-xFex(x=0，2，6，10) 4种非晶/纳米晶合金粉末。采用X射线衍射分析(XRD)、扫描电镜(SEM)、透射电镜(TEM)和差示扫描量热仪(DSC)对合成粉末的相转变结构、形貌、微观结构和热物性等进行了表征。结果表明：合金体系的非晶形成能力和热稳定性随着 Fe元素含量的增大而增强，当x=0时，终态粉末为纳米晶结构；当x=10时，粉末合成为完全非晶态粉末。
关键字: 机械合金化；非晶合金；纳米晶；钛合金；热稳定性
（1. Institute of Powder Metallurgy, Guangzhou Research Institute of Non-ferrous Metals, Guangzhou 510650, China;
2. School of Mechanical and Automative Engineer, South China University of Technology, Guangzhou 510640, China）
Abstract:The effect of Fe content on glass forming ability and thermal stability for Ti-Nb-Zr-Ta-Fe alloy system was investigated. Four kinds of (Ti69.7Nb23.7Zr4.9Ta1.7)100-xFex (x=0, 2, 6, 10) amorphous/nanocrystalline powder were synthesized by mechanical alloying. The phase transition structure, morphology, microstructure and thermal properties of synthesized powder were characterized by XRD, SEM, TEM and DSC, respectively. The results show that the glass forming ability and thermal stability of alloy system become strong with the increase of Fe content. The synthesized alloy powders after the steady state milling transform from full nanocrystalline structure for x=0 to full amorphous structure for x=10.
Key words: mechanical alloying; amorphous alloy; nanocrystalline; titanium alloy; thermal stability
