Influence of modification of the diamond nanoparticles surface by W-C bond on sintering and properties of nanocomposite diamond-tungsten carbide

Abstract

It is shown that the use of a dissolved ammonium tungstate salt as a medium for the preparation of the initial mixture of diamond nanopowders and WO3 improves the sintering of the diamon -tungsten carbide nanocomposite. There are no sections in the structure of the sintered composite in which agglomerates of diamond particles or tungsten compounds were present. The hardness of this composite is 1.2 times that of a nanocomposite obtained without using a soluble tungsten-containing substance. The cutting tool, equipped with manufactured samples of the composite, has a high working capacity when processing products from aluminum-silicon alloys, silicified graphite, and hard alloys