Patent ID: 8790571
Filing Date: 2014-07-29
Classification: B22F,C22C

Abstract:
1. A method for preparing an article, the method comprising: compacting a mixture of a first pre-alloyed powder and a lubricant to thereby form a green part having a green strength sufficient to permit mechanical handling; applying a slurry to a surface of the green part to thereby form a slurry coated green part, wherein the slurry comprises a second pre-alloyed powder, a binder, and a solvent; wherein the first pre-alloyed powder is a Ni-based, Co-based, or Fe-based powder, and the second pre-alloyed powder is Ni-based or Co-based powder; and heating the coated green part to a temperature below the solidus temperature of the first pre-alloyed powder and between the solidus temperature and the liquidus temperature of the second pre-alloyed powder to thereby solid state sinter the first pre-alloyed powder into a sintered core and to liquid state sinter the second pre-alloyed powder into a continuous alloy coating over the sintered core.