| 摘要 |
The present invention relates to a composite material, comprising: i. a modified MCrAlY formulation, the formulation characterized by an absence of silicon and hafnium, wherein M comprises Co in an amount of about 45 to about 75 weight percent (wt%), Ni is an amount of 0 to about 12 wt% and Fe is in an amount of 0 to about 12 wt%; Cr is in an amount of about 15 to about 25 wt%; Y is in an amount of about 0.1 to about 1.0 wt%; Al is in an amount of about 5 to about 10 wt%; and Nb is in an amount of about 6 to about 15 wt%; and ii. a ceramic material, the ceramic material incorporated into the MCrAlY formulation in an amount from about 15 to about 45 wt% of the composite material, wherein the ceramic material is a metal oxide. The specific combination of the constituents of the MCrAlY formulation advantageously allows significantly high loadings of ceramic (metal oxide) while still retaining the ability to selectively oxidize aluminum to form alumina scale, a property previously not attainable with conventional MCrAlY materials when loaded with ceramics at levels of 15-45 weight percent. The alumina scale in combination with the modified MCrAlY formulation acts as a barrier to specific detrimental oxide formations. The compositions of the present invention can act as protective coatings for a wide array of applications. |
