Open AccessX-ray diffraction study of a tungsten-based material for the first wall of ITER
Author(s) -
A Kozushkina,
S. I. Pavlov,
A. V. Voronin,
R. V. Sokolov,
A. A. Levin
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1697/1/012134
Subject(s) - crystallite , diffraction , tungsten , asymmetry , materials science , scanning electron microscope , analytical chemistry (journal) , reflection (computer programming) , x ray crystallography , x ray , spectroscopy , optics , chemistry , physics , composite material , metallurgy , chromatography , quantum mechanics , computer science , programming language
Methods of X-ray diffraction (XRD), Scanning Electron Microscopy and Energy Dispersive X-ray Spectroscopy were applied to POLEMA W sample after He plasma irradiation. The W reflections of the plasma treated sample exhibit an evident asymmetry characterized by a negative asymmetry parameter. Using the Williamson-Hall Plot technique the XRD reflection asymmetry has been successfully quantitatively described in frame of a model with two W phases with slightly different unit cell parameters and essentially different crystallite size and microstrain values.