机械合金化制备纳米TiC增强Ti基复合粉末  

Preparation of Nano TiC Reinforced Ti-matrix Composite Powder by Mechanical Alloying

作　　者：方超 姚正军[1,2] 杜文博 尹春生[1] 刘奇 FANG Chao;YAO Zheng-jun;DU Wen-bo;YIN Chun-sheng;LIU Qi(College of Material Science and Technology,Nanjing University of Aeronautics and Astronautics, Nanjing 211106 ,China;Key Laboratory of Materials Preparation and Protection for Harsh Environment,Ministry of Industry and Information Technology,Nanjing 211106,China)

机构地区：[1]南京航空航天大学材料科学与技术学院,江苏南京211106 [2]面向苛刻环境的材料制备与防护技术工业和信息化部重点实验室,江苏南京211106

出　　处：《稀有金属与硬质合金》2019年第1期19-25,共7页Rare Metals and Cemented Carbides

基　　金：江苏省"六大人才高峰"第十二批高层次人才资助项目(YPC16005-PT);江苏省高校优势学科建设工程资助项目

摘　　要：采用机械合金化法制备了纳米TiC增强Ti基复合粉末,通过XRD、SEM、TEM和EDS分别表征粉末的物相、形貌、晶体结构和元素分布,探索球磨转速、球料比及球磨时间对复合粉末物相形貌的影响。结果表明:当球磨转速达到300 r/min以上、球料比达到20∶1以上时,球磨效率无明显差异。球磨时间达到10 h,粉末中TiC物相明显;继续延长球磨时间至20 h,得到纳米级TiC增强相。在300 r/min球磨转速、20∶1球料比、20 h球磨时间条件下,可得到纳米TiC增强Ti基复合粉末,粉末中部分区域呈非晶态,大量纳米TiC颗粒弥散分布于粉末中。Nano TiC reinforced Ti-matrix composite powder was prepared by mechanical alloying.The phase,morphology,crystal structure and element distribution of the powder were characterized by XRD, SEM,TEM and EDS.The effects of milling speed,ball-to-powder mass ratio and milling time on phase and morphology of the composite powder were investigated.The results show that milling efficiency has no significant difference when milling speed reaches 300 r/min or higher,and ball-to-powder mass ratio reaches 20 :1 or higher.TiC phase in the powder is obvious when milling time reaches 10 h,and nano TiC reinforcement phase is obtained when milling time is extended to 20 h.Under the conditions of 300 r/min milling speed,20 :1 ball-to-powder mass ratio and 20 h milling time,nano TiC reinforced Ti-matrix composite powder can be obtained,and part of the powder is amorphous,where a large number of nano TiC particles are dispersed.

关 键 词：Ti基复合粉末 纳米TIC 机械合金化 弥散分布 物相 形貌 

分 类 号：TG146.23[一般工业技术—材料科学与工程]