Effect of helium implantation on mechanical properties of niobium doped tungsten  

作　　者：MA YuTian ZHANG Ying LU GuangHong ZHU KaiGui 

机构地区：[1]Department of Physics,Beihang University

出　　处：《Science China(Physics,Mechanics & Astronomy)》2013年第7期1396-1400,共5页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos. 51061130558 and 51171006);the National Magnetic Confinement Fusion Program(Grant No. 2011GB108008)

摘　　要：Helium atoms were implanted into niobium-doped tungsten and pure tungsten via ion implantation, and the effect of helium implantation on mechanical properties of two types of sample was studied by X-ray photoelectron spectroscopy, scanning electron microscope and nano-hardness tester. The results clearly show that the surface hardness and elastic modulus of tungsten are improved by implanted niobium ions, and the degradation of mechanical properties is mitigated comparing to pure tungsten under identical helium implantation fluence. It can be concluded that the defects induced by niobium implantation improved the mechanical properties of tungsten by obstructing the slip of dislocation.Helium atoms were implanted into niobium-doped tungsten and pure tungsten via ion implantation, and the effect of helium implantation on mechanical properties of two types of sample was studied by X-ray photoelectron spectroscopy, scanning electron microscope and nano-hardness tester. The results clearly show that the surface hardness and elastic modulus of tung- sten are improved by implanted niobium ions, and the degradation of mechanical properties is mitigated comparing to pure tungsten under identical helium implantation fluence. It can be concluded that the defects induced by niobium implantation improved the mechanical properties of tungsten by obstructing the slip of dislocation.

关 键 词：TUNGSTEN niobium doped helium implantation mechanical property 

分 类 号：TN305.3[电子电信—物理电子学] TG113.25[金属学及工艺—物理冶金]