Patent ID: 6153313
Filing Date: 2000-11-28
Classification: C23C,Y10T

Abstract:
A coating system on a substrate, the coating system comprising a thermal-insulating ceramic layer adhered to the substrate by a predominantly .beta.-phase NiAl intermetallic overlay coating layer, the intermetallic overlay coating layer consisting of 30 to 60 atomic percent aluminum, at least one element chosen from the group consisting of 0.5 to 25 atomic percent chromium, 0.1 to 5 atomic percent titanium, and 0.01 to 2.0 atomic percent hafnium, and optionally at least one element chosen from the group consisting of 0.1 to 5 atomic percent tantalum, 0.1 to 5 atomic percent silicon, 0.02 to 0.2 atomic percent gallium, 0.01 to 0.5 atomic percent zirconium, 0.01 to 1 atomic percent calcium, 0.02 to 0.5 atomic percent iron, and 0.01 to 1 atomic percent yttrium, the balance nickel and impurities.