PREP法制备Ti-60Ta合金粉末及其性能  

Ti-60Ta Powders Produced by PREP and Their Properties

作　　者：赵少阳[1] 殷京瓯[1] 沈垒 葛渊[1] 陈刚[1,2] 

机构地区：[1]西北有色金属研究院金属多孔材料国家重点实验室,陕西西安710016 [2]中南大学粉末冶金国家重点实验室,湖南长沙410083

出　　处：《稀有金属材料与工程》2017年第6期1679-1683,共5页Rare Metal Materials and Engineering

基　　金：陕西省科技统筹创新工程计划(2016KTCQ01-113);陕西省青年科技新星项目(2016KJXX-78);中南大学粉末冶金国家重点实验室开放基金

摘　　要：利用等离子旋转电极雾化技术制备出球形Ti-60Ta合金粉末,利用SEM、XRD和维氏显微硬度测试仪等分析手段对不同粒径的Ti-60Ta合金粉末表面形貌及内部的显微组织、相组成、树枝晶间距和维氏显微硬度进行了表征。结果表明,制备的Ti-60Ta合金粉末以β相为主,细粒径粉末还有少量马氏体α"相和ω相;大颗粒粉末的表面呈近似等轴花瓣状的树枝晶组织,小颗粒粉末表面枝晶组织则明显细化,并观察到细针状马氏体;随着粉末粒度减小,马氏体相增多,维氏显微硬度逐渐增大。Spherical Ti-60 Ta powders were produced by the plasma rotating electrode processing technique.The surface morphologies,internal microstructure,phase composition,distances between dendrites and micro-hardness of powders with different sizes were characterized by SEM,XRD and Vickers micro-hardness tester.Results indicate that the prepared Ti-60 Ta powders are mainly consisted of β phase while there are a small amount of martensitic α＂ and ω phases in the fine powders;the surface of larger particles present isometric petal-shaped dentritic microstructures,while small particles exhibit refined dendritic microstructures.Particularly,fine acicular martensitic appearance is observed on the smaller particles.As the powder particle size decreases,the martensite phases increase and accordingly Vickers micro-hardness increases.

关 键 词：等离子旋转电极雾化制粉技术 钛钽合金 显微结构 树枝晶间距 显微硬度 

分 类 号：TF123.71[冶金工程—粉末冶金]