The high temperature oxidation behavior of an APS processed γ–β NiCoCrAlY coating was investigated at 1150 °C. Ultrathin freestanding specimens ranging from 16 to 240 μm in thickness were tested for short-term time (< 300 h). Intrinsic chemical failure (InCF) occurred after the full consumption Al, and resulted Cr2O3 growth CrN precipitation Al2O3/alloy interface. Mass gain slowed down InCF, ev...

The paper demonstrates how defects inherited from the deposition processes can severely impair lifetime of MCrAlY coatings in service. oxidation behavior two NiCoCrAlY was investigated at 1150 °C up to 500 h. had same nominal composition but were processed by different projection techniques: air plasma spray (APS) and high velocity oxy fuel (HVOF). Freestanding coating specimens extracted coate...

MCrAlY bond coats (MNi, Co) for thermal barrier coating systems are often manufactured by low-pressure plasma spraying (LPPS) to achieve dense coatings with low oxygen uptake at high deposition efficiencies. Herein, the novel SinplexPro 03C spray torch (Oerlikon Metco) is characterized regarding this application, and appropriate process parameters developed. The mass-specific enthalpy hydrogen...