刘俊伟,万俊,鲁世强,刘军

• 1:南昌航空大学江西省金属材料微结构调控重点实验室

摘要(Abstract)：

采用机械合金化的方法制备了Ti_(44)Ni_(47)Nb_9形状记忆合金粉末,采用X射线衍射(XRD)、扫描电镜(SEM)分析和能量色散光谱(EDS)等分析了球磨工艺参数对粉末非晶度和颗粒尺寸的影响,得出了最佳的球磨工艺参数。分析了球磨转速、球料比以及球磨时间等参数对机械合金化过程的影响规律。结果表明:合金粉末在球磨60 h时已出现大部分非晶相,100 h时已接近完全非晶化。机械合金化制备的Ti_(44)Ni_(47)Nb_9合金粉末尺寸随球磨时间的增加先迅速减小后在60 h左右趋于稳定,在球磨速率不变的条件下,随着球磨时间增长,粉末的平均粒径大幅度减小,且由棱角分明的不规则体逐渐变化为球形体,在球磨初期(10～30 h)存在颗粒团聚的现象,随球磨时间延长(30 h后)该现象逐渐消失。从粉末颗粒尺寸、分布状况、圆滑程度等方面分析考虑:在球磨时间为100 h的条件下,当球磨转速为200 r/min、球料比为10∶1时机械合金化效果最佳。

关键词(KeyWords)： 机械合金化;球磨工艺;Ti_(44)Ni_(47)Nb_9合金

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51504138,51674118);; 航空动力基金(6141B090573);; 中国航空基金(2016ZF56027,2017ZE56016);; 江西省科技支撑计划(20141122040007);; 江西省自然科学基金(20171BAB206002);; 江西教育厅科技项目(GJJ150726);; 江西省金属材料微结构调控重点实验室开放课题(EJ201701515);; 江西省“百人远航工程”项目;; 江西省省级研究生教改课题(JXYJG-2016-133)

作者(Author): 刘俊伟,万俊,鲁世强,刘军

DOI: 10.13289/j.issn.1009-6264.2019-0017

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