Mo对NbCr2/Nb合金组织及性能影响  

Effect of Mo on Microstructure and Properties of NbCr2/Nb Alloy

作　　者：邓莉萍[1,2] 鲁世强[1,2] 汤斌兵 雷志立[1] 虞文 Deng Liping;Lu Shiqiang;Tang Binbing;Lei Zhili;Yu Wen(Nanchang Hangkong University,Nanchang 330063,China;Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;Nanchang University,Nanchang 330031,China)

机构地区：[1]南昌航空大学,江西南昌330063 [2]南京航空航天大学,江苏南京210016 [3]南昌大学,江西南昌330031

出　　处：《稀有金属材料与工程》2019年第5期1476-1480,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51074092);江西省自然科学基金(20161BAB206113);江西省教育厅落地计划项目(KJLD14056);江西省教育厅科技计划(GJJ160677)

摘　　要：采用机械合金化+热压工艺制备了NbCr2/Nb-XMo (X=0,2.5,5.0,7.5,10, at%)合金,研究了合金元素Mo对NbCr2/Nb合金组织及性能的影响。结果表明:合金元素Mo主要存在于Nb基体中,对合金的物相不产生明显影响,合金仍由Nb固溶体和NbCr2组成;Mo的添加使得NbCr2/Nb的相界面处应力增加,导致NbCr2颗粒中的层错/孪晶的密度增加,并促进了Nb基体中位错的运动,从而使得NbCr2/Nb合金在保持高强度的同时,具有良好的塑性和韧性。NbCr2/Nb-XMo (X=0,2.5,5.0,7.5,10,at%) alloys were prepared by mechanical alloying and hot pressing.The effects of alloying element Mo on microstructures and properties of the NbCr2/Nb alloy were studied.The results show that the additions of Mo element do not change the phase components of the NbCr2/Nb alloy,which are composed of Nb solid solution and NbCr2.Mo addition can increase the stress at the NbCr2/Nb phase interfaces,which increases stacking fault/twinning in the NbCr2 particles and promotes the movement of dislocations in the Nb matrix.The NbCr2/Nb alloy with an appropriate amount of Mo addition can maintain good plasticity and toughness as well as higher strength.

关 键 词：NbCr2/Nb合金 合金元素Mo 晶体缺陷 性能 

分 类 号：TG146.416[一般工业技术—材料科学与工程]