关键词: 钨/
中能高浓度氦离子/
氦泡/
显微结构
English Abstract
Microstructure of medium energy and high density helium ion implanted tungsten
Guo Hong-Yan1,2,Xia Min2,
Yan Qing-Zhi2,
Guo Li-Ping3,
Chen Ji-Hong3,
Ge Chang-Chun2
1.State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Beijing 100083, China;
2.Institute of Special Ceramics and Powder Metallurgy, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;
3.Accelerator Laboratory, School of Physics and Technology, Wuhan University, Wuhan 430072, China
Fund Project:Project supported by the National Basic Research Program of China (Grant Nos. 2010GB109000, 2014GB123000).Received Date:21 September 2015
Accepted Date:25 January 2016
Published Online:05 April 2016
Abstract:Bulk tungsten and tungsten transmission electron microscopy (TEM) lamella are implanted with 15 keV helium ions at about 873 K to study the microstructure evolution. The samples are implanted to about 11017 He+/cm2. The projected range of the helium ion in tungsten is about 43.9 nm, calculated with the stopping and range of ions in matter program (the SRIM code). The density of pores with diameters ranging from 90 nm to 430 nm is detected on the surface of helium implanted bulk tungsten by field emission scanning electron microscopy. Blistering is also observed on the surface of helium implanted bulk tungsten. The TEM results indicate that fuzz microstructure is formed in helium implanted tungsten TEM lamella, and stacking faults and micro-pores are observed in the fuzz structure. Besides, the density of nano-scaled helium bubbles is detected around the mirco-pores.
Keywords: tungsten/
medium energy and high density He+ implanted/
helium bubbles/
microstructures
