High strength oxidation resistant superalloy with enhanced coating compatibility

Abstract

A superalloy with enhanced coating compatibility. The alloy is a nickel-based alloy and may be used in various applications, such as the production of gas turbine components, due to its high strength. The alloys are highly oxidation resistant and have enhanced coating compatibility. The alloys may be used as an underlying substrate with a variety of different coatings, including thermal and environmental barrier coatings. The alloys may be produced using known casting and or alloy mastering techniques.

1 . A composition comprising: 
 from about 55 to about 70 percent, by weight, nickel;    from about 1.0 to about 2.0 percent, by weight, of hafnium;    from about 5.0 to about 6.0 percent, by weight, of aluminum;    from about 8.8 to about 10.2 percent, by weight, of tungsten; and    from about 0.001 to about 0.12 percent, by weight, of at least one rare earth element.    
     
     
         2 . The composition of  claim 1 , wherein the at least one rare earth element is selected from lanthanum, yttrium, cerium, or a combination thereof.  
     
     
         3 . The composition of  claim 1 , wherein the at least one rare earth element comprises two rare earth elements selected from lanthanum, yttrium, or cerium.  
     
     
         4 . The composition of  claim 1 , wherein the at least one rare earth element comprises a combination of lanthanum, yttrium, and cerium.  
     
     
         5 . The composition of  claim 1 , wherein the composition further comprises: 
 from about 7.2 to about 9.3 percent, by weight, of chromium;    from about 8.5 to about 10.0 percent, by weight, of cobalt;    from about 0.2 to about 0.8 percent, by weight, of molybdenum;    from about 2.8 to about 3.7 percent, by weight, of tantalum;    from about 0.4 to about 1.2 percent, by weight, of titanium;    from about 0.005 to about 0.03 percent, by weight, of boron;    from about 0.003 to about 0.03 percent, by weight, of zirconium; and    from about 0.03 to about 0.13 percent, by weight, of carbon.    
     
     
         6 . The composition of  claim 1 , wherein the composition comprises: 
 from about 55 to about 70 percent, by weight, nickel;    from about 7.6 to about 8.5 percent, by weight, of chromium;    from about 8.8 to about 9.7 percent, by weight, of cobalt;    from about 0.3 to about 0.7 percent, by weight, of molybdenum;    from about 9.2 to about 9.8 percent, by weight, of tungsten;    from about 3.0 to about 3.5 percent, by weight, of tantalum;    from about 5.2 to about 5.8 percent, by weight, of aluminum;    from about 0.6 to about 0.9 percent, by weight, of titanium;    from about 0.008 to about 0.025 percent, by weight, of boron;    from about 0.006 to about 0.025 percent, by weight, of zirconium;    from about 0.05 to about 0.11 percent, by weight, of carbon;    from about 1.2 to about 1.8 percent, by weight, of hafnium; and    from about 0.005 to about 0.05 percent, by weight, of at least one rare earth element.    
     
     
         7 . The composition of  claim 6 , wherein the at least one rare earth element is selected from lanthanum, yttrium, cerium, or a combination thereof.  
     
     
         8 . The composition of  claim 6 , wherein the at least one rare earth element comprises two rare earth elements selected from lanthanum, yttrium, or cerium.  
     
     
         9 . The composition of  claim 6 , wherein the at least one rare earth element comprises a combination of lanthanum, yttrium, and cerium.  
     
     
         10 . The composition of  claim 1 , wherein the composition comprises: 
 from about 55 to about 70 percent, by weight, nickel;    from about 7.8 to about 8.3 percent, by weight, of chromium;    from about 9.1 to about 9.5 percent, by weight, of cobalt;    from about 0.4 to about 0.6 percent, by weight, of molybdenum;    from about 9.4 to about 9.6 percent, by weight, of tungsten;    from about 3.1 to about 3.3 percent, by weight, of tantalum;    from about 5.5 to about 5.6 percent, by weight, of aluminum;    from about 0.7 to about 0.8 percent, by weight, of titanium;    from about 0.01 to about 0.02 percent, by weight, of boron;    from about 0.01 to about 0.02 percent, by weight, of zirconium;    from about 0.07 to about 0.09 percent, by weight, of carbon;    from about 1.4 to about 1.6 percent, by weight, of hafnium; and    from about 0.015 to about 0.025 percent, by weight, of at least one rare earth element.    
     
     
         11 . The composition of  claim 10 , wherein the at least one rare earth element is selected from lanthanum, yttrium, cerium, or a combination thereof.  
     
     
         12 . The composition of  claim 10 , wherein the at least one rare earth element comprises two rare earth elements selected from lanthanum, yttrium, or cerium.  
     
     
         13 . The composition of  claim 10 , wherein the at least one rare earth element comprises a combination of lanthanum, yttrium, and cerium.  
     
     
         14 . A composition comprising: 
 from about 55 to about 70 percent, by weight, nickel;    from about 7.2 to about 9.3 percent, by weight, of chromium;    from about 8.5 to about 10.0 percent, by weight, of cobalt;    from about 0.2 to about 0.8 percent, by weight, of molybdenum;    from about 8.8 to about 10.2 percent, by weight, of tungsten;    from about 2.8 to about 3.7 percent, by weight, of tantalum;    from about 5.0 to about 6.0 percent, by weight, of aluminum;    from about 0.4 to about 1.2 percent, by weight, of titanium;    from about 0.005 to about 0.03 percent, by weight, of boron;    from about 0.003 to about 0.03 percent, by weight, of zirconium;    from about 0.03 to about 0.13 percent, by weight, of carbon;    from about 1.0 to about 2.0 percent, by weight, of hafnium; and    from about 0.001 to about 0.12 percent, by weight, of at least one rare earth element;    wherein the at least one rare earth element is selected from lanthanum, yttrium, cerium, or a combination thereof.    
     
     
         15 . The composition of  claim 14 , wherein the composition comprises: 
 from about 55 to about 70 percent, by weight, nickel;    from about 7.6 to about 8.5 percent, by weight, of chromium;    from about 8.8 to about 9.7 percent, by weight, of cobalt;    from about 0.3 to about 0.7 percent, by weight, of molybdenum;    from about 9.2 to about 9.8 percent, by weight, of tungsten;    from about 3.0 to about 3.5 percent, by weight, of tantalum;    from about 5.2 to about 5.8 percent, by weight, of aluminum;    from about 0.6 to about 0.9 percent, by weight, of titanium;    from about 0.008 to about 0.025 percent, by weight, of boron;    from about 0.006 to about 0.025 percent, by weight, of zirconium;    from about 0.05 to about 0.11 percent, by weight, of carbon;    from about 1.2 to about 1.8 percent, by weight, of hafnium; and    from about 0.005 to about 0.05 percent, by weight, of at least one rare earth element.    
     
     
         16 . The composition of  claim 15 , wherein the composition comprises: 
 from about 55 to about 70 percent, by weight, nickel;    from about 7.8 to about 8.3 percent, by weight, of chromium;    from about 9.1 to about 9.5 percent, by weight, of cobalt;    from about 0.4 to about 0.6 percent, by weight, of molybdenum;    from about 9.4 to about 9.6 percent, by weight, of tungsten;    from about 3.1 to about 3.3 percent, by weight, of tantalum;    from about 5.5 to about 5.6 percent, by weight, of aluminum;    from about 0.7 to about 0.8 percent, by weight, of titanium;    from about 0.01 to about 0.02 percent, by weight, of boron;    from about 0.01 to about 0.02 percent, by weight, of zirconium;    from about 0.07 to about 0.09 percent, by weight, of carbon;    from about 1.4 to about 1.6 percent, by weight, of hafnium; and    from about 0.015 to about 0.025 percent, by weight, of at least one rare earth element.    
     
     
         17 . The composition of  claim 14 , wherein the at least one rare earth element comprises two rare earth elements selected from lanthanum, yttrium, or cerium.  
     
     
         18 . The composition of  claim 14 , wherein the at least one rare earth element comprises a combination of lanthanum, yttrium, and cerium.