Abrasive material, especially for turbine blade tips

Details Abrasive material, especially for turbine blade tips Abrasive material, especially for turbine blade tips

C - Chemistry, Metallurgy

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C22C 29/00 (2006.01) B22F 3/10 (2006.01) B24D 3/08 (2006.01) B24D 18/00 (2006.01) C22C 1/10 (2006.01) C22C 32/00 (2006.01) F01D 5/20 (2006.01)

Patent

CA 1287742

ABSTRACT An abrasive material comprised of a metal matrix and evenly distributed ceramic particulates, is made toy mixing powder metal with the ceramic powder and heating to a temperature sufficient to melt most, but not all of the powder. In this way the ceramic does not float to the top of the material, yet a dense material is obtained. A nickel superalloy matrix will have at least some remnants of the original powder metal structure, typically some equiaxed grains, along with a fine dendritic structure, thereby imparting desirable high temperature strength when the abrasive material is applied to the tips of blades of gas turbine engines. Preferred matrices have a relatively wide liquidus-solidus temperature range, contain a melting point depressant, and a reactive metal to promote adhesion to the ceramic. 14

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