Cold spray is a promising technique by which the coating can be of high purity from oxidation.NiCoCrAlY alloy powder was deposited on Mar-M247 substrates by cold spray as bond coat on which YSZ coating was deposited by plasma spraying.All TBCs were pre-treated and thermal cycled.The surface morphology of cold sprayed bond coat,the failure models of TBCs and the characterization of TGO were examined.Both the relationship between growth of TGO and the surface morphology and the effects of growth of TGO on the...