Patent ID: 6521356
Filing Date: 2003-02-18
Classification: C23C,Y02T,Y10T

Abstract:
A turbine system having at least one turbine component, said turbine component comprising:a) at least one niobium-based refractory metal intermetallic composite, wherein said niobium-based refractory metal intermetallic composite comprises one of: i) between about 19 atomic percent and about 24 atomic percent titanium, between about 1 atomic percent and about 5 atomic percent hafnium, between about 11 and about 22 atomic percent silicon, between about 5 and about 14 atomic percent chromium, and a balance of niobium; and ii) between about 19 and about 24 atomic percent titanium; between about 1 and about 5 atomic percent hafnium; up to about 7 atomic percent tantalum; between about 11 and about 22 atomic percent silicon; up to about 6 atomic percent germanium; up to about 12 atomic percent boron; between about 5 and about 14 atomic percent chromium; up to about 4 atomic percent iron; up to about 4 atomic percent aluminum; up to about 3 atomic percent tin; up to about 3 atomic percent tungsten; up to about 3 atomic percent molybdenum; and a balance of niobium; and b) an environmentally resistant coating disposed on a surface of said niobium-based refractory metal intermetallic composite, said environmentally resistant coating comprising silicon, titanium, chromium, and niobium.