High hardness, wear resistant materials
AssigneeThe Dow Chemical Company
InventorsEllen M. Dubensky, Edward E. Timm
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Abstract
A powdered admixture of a boron, carbon, nitrogen or silicon derivative of a first metal, e.g., tungsten carbide, and a source of a second metal, e.g., molybdenum subcarbide when the second metal is molybdenum, is, when subjected to densification conditions, partially reacted and converted to a hard, wear resistant material. Such a material, formed from an admixture of tungsten carbide and molybdenum subcarbide, contains tungsten monocarbide and at least one mixed tungsten/molybdenum carbide. This material has a Vickers hardness of at least about 2200 kg/mm.sup.2 measured using a 1 kg load. Articles formed from this material can be useful as, for example, nozzles in abrasive or nonabrasive waterjet cutting machines and various parts of wire drawing apparatus.
Claims13
A material suitable for use in fabricating articles of manufacture requiring high degrees of hardness or wear resistance, the material consisting essentially of a substantially fully dense, complex, multi-phase, fine-grained product of an incomplete reaction between AX and a source of B, the reaction taking place under pressure and at an elevated temperature, said product consisting essentially of at least one compound AX and at least one compound (A,B)X wherein A and B are different materials selected from the group consisting of titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum and tungsten and X is carbon.
Dependencies are inferred from the claim text.