DIAMOND-CONTAINING STRATIFIED COMPOSITE MATERIAL AND METHOD OF MANUFACTURING THE SAME

摘要

This super-abrasive-containing stratified composite material has a base member comprising a ceramic material and a metallic material, or a lump of a plurality of metallic materials; and a super-abrasive-containing lump bonded as an adjacent layer to a surface of the base member, and is characterized in that this super-abrasive-containing lump contains super-abrasive of a density which accounts for not less than 25 % and not more than 95 % of the whole in volume percentage, the density of at least one kind of metallic component being increased or decreased continuously or in a stepped manner or in a combined continuous-stepped manner between a working surface of this super-abrasive and a rear surface of the base member via both lump-bonded surfaces. This composite material can be manufactured effectively by the following method. A first mixture of super-abrasive and metal powder is disposed adjacently to a second mixture containing powder prepared so as to form a ceramic material by a SHS (burning synthesis) reaction, and a SHS reaction is then generated in the second mixture so as to generate high-temperature heat, whereby the metal powder in the first mixture is melted at least partially and poured into the second mixture, this melted component being thus contained in the mixtures at a content inclining from the first mixture to the second mixture. During this time, the pressurizing of the mixtures is done in parallel with the generation of the high-temperature heat to compact the structure to be formed.