Home List of Titles Mechanical characterization of plasma sprayed ceramic coatings on metal substrates by contact testing
Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/41691
- Mechanical characterization of plasma sprayed ceramic coatings on metal substrates by contact testing
- Pajares, Antonia; Wei, Lanhua; Lawn, Brian R.; Padture, Nitin P.; Berndt, C. C.
- Hertzian indentation testing is used to generate contact damage in plasma sprayed ceramic coatings on metal substrates. Two basic ceramic/metal coating/substrate systems are examined: alumina on steel and zirconia on superalloy. Macroscopic mechanical responses are measured via indentation stress-strain curves, which quantify the relative role of the coating and substrate in the net deformation and facilitate evaluations of elastic moduli and yield stresses. Micromechanical damage processes within the coating and substrate subsurface layers are studied using a "bonded-interface" specimen. Degradation occurs primarily by delamination and other cracking at the coating/substrate interface or in the coating, but plastic deformation of the metal substrate contributes importantly to the crack driving force.
- Publication type
- Journal article
- Materials Science and Engineering A, Vol. 208, no. 2 (Apr 1996), pp. 158-165
- Publication year
- Alumina; Ceramic coatings; Coatings; Contact damage; Cracks; Degradation; Delamination; Fracture; Hertzian indentation; Indentation stress strain curves; Mechanical properties; Metals; Plasma spraying; Plastic deformation; Plasticity; Steel; Substrates; Superalloys; Zirconia
- Publisher URL
- Copyright © 1996 Published by Elsevier B.V.
- Peer reviewed