Patent ID: 6372346
Filing Date: 2002-04-16
Classification: B22F,C09K,C22C,Y10T

Abstract:
A sintered material comprising:a plurality of core particles, said core particles consisting essentially of a first metal compound having the formula MaXb where M is a metal selected from the group consisting of titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, tungsten, aluminum, and silicon, X represents one or more elements selected from the group consisting of nitrogen, carbon, boron, and oxygen, and a and b are numbers greater than zero up to and including four, an intermediate layer on each of said core particles, said layer consisting essentially of a second metal compound, different in composition from said first metal compound and having a higher relative fracture toughness, said second metal compound being capable of bonding with said first metal compound and being capable of bonding with a metal selected from the group consisting of iron, cobalt, and nickel, thereby forming coated particles; and a binder overlaying said intermediate layer on said coated particles, said binder comprising at least one of iron, cobalt, nickel, their mixtures, their alloys, or their intermetallic compounds.