Patent ID: 7635448
Filing Date: 2009-12-22
Classification: B22F,C22C

Abstract:
1. A method of producing composite material including: a multi-component system ceramics comprised of constitutive elements of N, C and at least two metal elements selected from the group consisting of Ti, Al, V, Nb, Zr, Hf, Mo, Ta, Cr, and W; and a metal selected from the group consisting of Fe, Ni, Co, and an alloy composed of a constitutive element of at least one metal element of Fe, Ni, and Co; wherein said method comprises the steps of: mixing metal particles which are comprised of at least two types of powders selected from the group consisting of Ti, Al, V, Nb, Zr, Hf, Mo, Ta, Cr, and W, and a reducing agent for reducing any oxide film formed on the surface of said metal particles, and a catalyst to form a mix powder, and forming an alloy by mechanical alloying said metal particles in said mix powder; sintering said mix powder in the presence of nitrogen gas to obtain multi-component system ceramics powder; removing impurities from said multi-component system ceramic powder by using an acid solution; mixing said multi-component system ceramic powder and a metal powder selected from the group consisting of Fe, Ni, Co, and an alloy composed of a constitutive element of at least one metal element of Fe, Ni, and Co, and performing heat treatment, wherein the catalyst is selected from a group consisting of elements of Group VIIA other than Manganese (Mn) and Rhenium (Re), and compounds of Group VIIA other than Manganese (Mn) and Rhenium (Re).