Three-dimensional displacement mapping of diffused Pt thermal barrier coatings via synchrotron X-ray computed tomography and digital volume correlation

SCRIPTA MATERIALIA

卷:115

Article

Khoshkhou, D.¹  Mostafavi, M.^2,3,6  Reinhard, C.⁴  Taylor, M. P.¹  Rickerby, D. S.⁵  Edmonds, I. M.⁵  Evans, H. E.¹  Marrow, T. J.^2,3  Connolly, B. J.¹ 

[1] Univ Birmingham, Sch Met & Mat, Birmingham B15 2TT, W Midlands, England

[2] Univ Oxford, Dept Mat, Parks Rd, Oxford OX1 3PH, England

[3] Univ Oxford, Oxford Martin Sch, Oxford OX1 3PH, England

[4] Diamond Light Source, I12 JEEP Beamline, Harwell Sci & Innovat Campus, Didcot OX11 0DE, Oxon, England

[5] Rolls Royce Plc, POB 31, Derby DE24 8BJ, England

[6] Univ Bristol, Dept Mech Engn, Queens Bldg, Bristol BS8 1TR, Avon, England

关键词: Thermal barrier coating;    Three-dimensional tomography;    Synchrotron radiation;    Cyclic oxidation;    Digital volume correlation;   

DOI  :  10.1016/j.scriptamat.2015.10.033

来源: Elsevier

【 摘 要 】

A progressive study of the three-dimensional deformation field within a gamma/gamma' thermal barrier coating following cyclic oxidation at 1200 degrees C is presented, observed using synchrotron X-ray micro-computed tomography and analysed by digital volume correlation. Oxide thickening and bond coat creep displacements are quantified as a function of exposure time at temperature. Linear gradients of these displacements are measured both in plane and normal to the oxide layer. The first thermal cycle shows the most displacement changes; destructive sectioning confirms the DVC-calculated displacement magnitudes. (C) 2015 Published by Elsevier Ltd.

【 授权许可】

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