STRENGTH OF HVOF COATING-SUBSTRATE INTERFACES

A spherical indentation technique has been developed to determine the interfacial adhesion between thick film coatings and substrates. The t hreshold stress for interfacial delamination is found through a hybrid experimental-numerical approach. The threshold load for delamination is found experimentally, and goes together with the materials elastic- plastic descriptors and the coating thickness into a finite element mo del that calculates the corresponding threshold stress for delaminatio n. (C) 1998 Published by Elsevier Science S.A. All rights reserved.