Phase composition and residual stresses in thermal barrier coatings

23rd International Conference on Vacuum Technique and Technology

Lozovan, A.A.^1 ; Betsofen, S.Ya.^1 ; Ashmarin, A.A.^2 ; Ryabenko, B.V.^3 ; Ivanova, S.V.^4

Moscow Aviation Institute, National Research University, Ul. Orshanskaya 3, Moscow

121552, Russia^1

Institute of Metallurgy and Materials N. A. A A Baykova, Russian Academy of Sciences, Leninsky pr. 49, Moscow

119991, Russia^2

FGUP NPTsG Salyut, Moscow

105118, Russia^3

National Research Nuclear University, MEPhi (Moscow Engineering Physics Institute), Moscow

115409, Russia^4

关键词: APS coating;    Ceramic layer;    Gradual transition;    Residual stresses distributions;    Tetragonal lattices;    Transition zones;    Underlayers;    X-ray studies;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/729/1/012017/pdf
DOI  :  10.1088/1742-6596/729/1/012017

来源: IOP

【 摘 要 】

X-ray study of the phase composition and residual stresses distribution in two-layer APS coatings showed that the ceramic layer consists of t-ZrO2phase with tetragonal lattice and the metal underlayer γ-solid solution based on nickel. In the transition zone thickness of ∼ 100 pm as the distance from the surface was revealed a gradual transition from t-ZrO2to γ-solid solution. Increase in the specific volume of the metal underlayer resulting TGO growing leads to the formation of this layer high compressive stresses up to 600 MPa. In this case, the ceramic layer contains tensile stress up to 200 MPa.