PLASMA-CHEMICAL PROCESSES AND UNITS IN POWDER METALLURGY FOR PRODUCTION OF ULTRA-DISPERSED POWDERS AND NANO-STRUCTURAL MATERIALS

摘要

Many scientists are busy at that time in the field of the development of nano-structural hard alloys, using different methods of production of ultra-dispersed powders (mainly chemical and hydrometallurgical methods for fabrication of homogeneous mixes). Rather expensive compounds of tungsten and cobalt are used for this purpose, and these processes are longterm and use complicated and expensive devices. Plasma-chemical methods of manufacturing ultra-dispersed powders have here large advantages, because, besides plasma unit, all other equipment can be used from conventional hard alloy technology and with substantiallowering of power consumption, while used raw materials is also conventional (tungsten trioxide or ammonium paratungatate).