Surface hardening induced by high flux plasma in tungsten revealed by nano-indentation

被引：31
|
作者：
Terentyev, D. [1 ]
Bakaeva, A. [1 ,2 ]
Pardoen, T. [3 ]
Favache, A. [3 ]
Zhurkin, E. E. [4 ]
机构：
[1] CEN SCK, Nucl Mat Sci Inst, Boeretang 200, B-2400 Mol, Belgium
[2] Univ Ghent, Dept Appl Phys, St Pietersnieuwstr 41, B-9000 Ghent, Belgium
[3] Catholic Univ Louvain, Inst Mech Mat & Civil Engn, Pl Sainte Barbe 2 L5-02-02, B-1348 Louvain, Belgium
[4] St Petersburg State Polytech Univ, Fac Phys & Mech, Dept Expt Nucl Phys K 89, 29 Polytekhnicheskaya Str, St Petersburg 195251, Russia
来源：
JOURNAL OF NUCLEAR MATERIALS | 2016年 / 476卷
关键词：
Dislocations; Tungsten; Hydrogen; Embrittlement; RECENT PROGRESS; CRYSTALLINE; DEUTERIUM; ENERGY;
D O I：
10.1016/j.jnucmat.2016.04.007
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Surface hardness of tungsten after high flux deuterium plasma exposure has been characterized by nanoindentation. The effect of plasma exposure was rationalized on the basis of available theoretical models. Resistance to plastic penetration is enhanced within the 100 nm sub-surface region, attributed to the pinning of geometrically necessary dislocations on nanometric deuterium cavities e signature of plasma-induced defects and deuterium retention. Sub-surface extension of thereby registered plasma-induced damage is in excellent agreement with the results of alternative measurements. The study demonstrates suitability of nano-indentation to probe the impact of deposition of plasma-induced defects in tungsten on near surface plasticity under ITER-relevant plasma exposure conditions. (C) 2016 Elsevier B.V. All rights reserved.
引用
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页码：1 / 4
页数：4
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