Through-thickness Residual Stress Measurement by Neutron Diffraction in Cu+W Plasma Spray Coatings

0347457 - ÚFP 2011 RIV CH eng J - Journal Article
Luzin, V. - Matějíček, Jiří - Gnäupel-Herold, T.
Through-thickness Residual Stress Measurement by Neutron Diffraction in Cu+W Plasma Spray Coatings.
Materials Science Forum. Roč. 652, č. 652 (2010), s. 50-56. ISSN 1662-9752.
[International Conference on Mechanical Stress Evaluation by Neutrons and Synchrotron Radiation/5th./. Mito, 10.11.2009-12.11.2009]
R&D Projects: GA MŠMT ME 901
Institutional research plan: CEZ:AV0Z20430508
Keywords : fusion materials * plasma sprayed coatings * residual stress * neutron diffraction
Subject RIV: JG - Metallurgy
http://www.scientific.net/MSF.652.50

Tungsten-based coatings have potential application in plasma facing components in fusion reactors. In this work, residual stresses in two-phase Cu+W coatings made by water stabilized plasma spraying were studied. Two-phase coatings develop both significant microstress (inter-phase stress) and the stress dependence on phase content of the coating constituents. Through-thickness residual stress profiles have been measured by neutron diffraction with spatial resolution of 0.5 mm for a series of Cu+W coatings with varying volume fractions. Measurements were made in both phases in order to separate micro- and macro-stresses. Comprehensive sample characterization, measurements of the residual stresses, mechanical and thermal properties of the composite coatings enabled quantitative modeling and interpretation of the experimental data.
Permanent Link: http://hdl.handle.net/11104/0188229