Effects of low energy helium plasma irradiation on potassium doped tungsten

被引：15
作者：
Shu, Xiaoyan [1 ,2 ]
Huang, Bo [1 ]
Liu, Dongping [3 ]
Fan, Hongyu [3 ]
Liu, Ning [1 ]
Tang, Jun [1 ]
机构：
[1] Sichuan Univ, Inst Nucl Sci & Technol, Key Lab Radiat Phys & Technol, Minist Educ, Chengdu, Peoples R China
[2] Southwest Univ Sci & Technol, Key Subject Lab Natl Def Radioact Waste & Environ, Mianyang, Peoples R China
[3] Dalian Nationalities Univ, Sch Phys & Mat Engn, Dalian, Peoples R China
来源：
FUSION ENGINEERING AND DESIGN | 2017年 / 117卷
基金：
中国国家自然科学基金;
关键词：
W-K; Spark plasma sintering; Helium; Irradiation; Defect; Microstructure; MICROSTRUCTURE; GROWTH; METALS;
D O I：
10.1016/j.fusengdes.2017.02.004
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
Effects of helium plasma irradiation on spark plasma sintering (SPS) W-K, pure W and traditionally sintered commercial W-K have been studied, concerning the density, grain size and potassium content as the influence factors. Pinholes are formed under 120 eV He ions at 600 degrees C and 1 x 10(23) m(-2) fluence on the surface of all samples. It is found that SPS-sintered W-K shows the best irradiation resistance among the present samples, and SPS-sintered pure W exhibits higher irradiation tolerance than commercial W-K. Different He-plasma tolerance was observed among the SPS-sintered W-K samples due to varied potassium content and grain size. In addition, the microstructure evolution under helium irradiation, the growth-migration of helium bubbles and their interactions of potassium bubbles have also been discussed. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：8 / 13
页数：6
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