Deformation of Plasma Sprayed Thermal Barrier Coatings

Author:

Senturk Ufuk1,Lima Rogerio S.1,Lima Carlos R. C.2,Berndt Christopher C.1

Affiliation:

1. Center for Thermal Spray Research, Department of Materials Science and Engineering, State University of New York at Stony Brook, Stony Brook, NY 11794-2275

2. UNIMEP Methodist University of Piracicaba, Technology Center, Rod. Santa Barbara-Iracemapolis, Km 1, Santa Barbara d’Oeste, S. Paulo, 13450-000, Brazil

Abstract

The deformation behavior of thermally sprayed partially stabilized zirconia (PSZ) coatings are investigated using Hertzian indentation and four-point bend testing, with in situ acoustic emission monitoring. The experimental deformation curves, together with the corresponding acoustic emission responses and the fracture properties of the material are used in defining the deformation characteristics of the coating (ceramic overlay with metallic bond coat where applicable) and substrate composite system. Experiments are aimed in examining the influence of the bond coat and the coating properties on the form of deformation. Substrate temperature and pauses during spraying are demonstrated to strongly effect the coating properties and the resulting fracture/failure characteristics of the composite system. [S0742-4795(00)02503-5]

Publisher

ASME International

Subject

Mechanical Engineering,Energy Engineering and Power Technology,Aerospace Engineering,Fuel Technology,Nuclear Energy and Engineering

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