초록 ▼

A bond coat and method of forming a bond coat for a thermal barrier coating system are set forth. The bond coat is a roughened bond coat and comprises a layer possessing an uneven, undulated, and irregular surface. The layer is formed of a metal powder mixture disposed on a substrate, such as a turb

A bond coat and method of forming a bond coat for a thermal barrier coating system are set forth. The bond coat is a roughened bond coat and comprises a layer possessing an uneven, undulated, and irregular surface. The layer is formed of a metal powder mixture disposed on a substrate, such as a turbine component, by high velocity oxygen fuel spraying. The metal powder mixture comprises at least one of a first powder having a first melting point and a second powder having a second melting point that is higher than the first melting point. The bond coat's uneven, undulated, and irregular surface enhances prevention of de-bonding of elements in a thermal barrier coating system.

대표청구항 ▼

[ What is claimed is:] [1.] A bond coat comprising:a layer possessing an uneven, undulated, and irregular surface, the layer formed of a metal powder mixture disposed on a substrate by a thermal spraying process, wherein the metal powder mixture comprises a first powder having a first melting point

[ What is claimed is:] [1.] A bond coat comprising:a layer possessing an uneven, undulated, and irregular surface, the layer formed of a metal powder mixture disposed on a substrate by a thermal spraying process, wherein the metal powder mixture comprises a first powder having a first melting point and a second powder having a second melting point that is higher than the first melting point, and a density of the bond coat is at least about 95% its theoretical density and the metal powder mixture that forms the bond coat layer comprises at least one of Ni-60Al-1B and Al-11.6Si as the first powder, and at least one of Ni-20Cr and MCrAlY-20Cr as the second powder, where M is at least one of nickel, iron and cobalt.