Session *BB7.1

10:30 AM *BB7.1
THERMO-MECHANICAL RESPONSE OF PLASMA-SPRAYED COATINGS. Subra Suresh, Massachusetts Institute of Technology, Dept of Materials Science and Engineering, Cambridge, MA.

The response of plasma-sprayed coatings subjected to thermal and mechanical loads will be examined. Particular attention will be devoted to the arrest of surface flaws advanced through the coatings by fatigue. On the basis of critical experiments and detailed numerical analyses, stategies will be presented for the enhancement of damage tolerance of thermal-barrier and wear-resistant plasma-spray coatings. A case study which demonstrates the success of the proposed strategy for thermally-sprayed wear-resistant coatings in an industrial application will also be discussed. New methods for the assessment of internal stresses in homogeneous as well as multi-layered and graded coatings will also be examined.