engleski

Degradation of microstructure in plain and platinum aluminide coatings on superalloy ZhS6U during isothermal oxidation

Isothermal oxidation at 1100°C of a high activity plain aluminide coating and a platinum aluminide coating, developed by the pack cementation technique, on cast nickel base superalloy ZhS6U has been carried out with the primary objective of systematically understanding the coating degradation process during oxidation. The microstructural degradation of both the plain aluminide and platinum aluminide coatings during oxidation was seen to occur in three distinct stages which, however, differed for each coating. This stagewise degradation, which involves final obliteration of the interdiffusion layer in each case, is discussed in detail.

superalloy ZhS6U ; isothermal oxidation

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