The influence of the method of an arc discharge initiation on the product of plasma dynamic synthesis in the W-C system

A A Sivkov,I A Rakhmatullin,D S Nikitin,I I Shanenkov,A Nassyrbayev

doi:10.1088/1757-899x/1019/1/012072

Abstract

Cubic tungsten carbide WC1−x is distinguished by the difficulty of obtaining in a dispersed and bulk form. The article attempts to plasma dynamic synthesis of cubic tungsten carbide in powder form. The method is based on the use of a coaxial magnetoplasma accelerator for the generating a supersonic plasma jet, which is then rapidly cooled. The possibility of obtaining a powder with a predominant content of WC1−x (up to 95%) is shown. Studying the influence of the method of an arc discharge initiation allowed to reveal the efficiency of using graphitization in comparison with carbon fibers.

Highlights

A pressing problem in the industry is the production of superhard and refractory materials
Plasma dynamic synthesis is used to synthesize cubic tungsten carbide, since it provides the heating to a high temperature required for the formation of this phase and rapid cooling
Experimental The synthesis of ultrafine cubic tungsten carbide was carried out using a high-current pulsed coaxial magnetoplasma accelerator with graphite electrodes (CMPA)

Summary

Introduction

A pressing problem in the industry is the production of superhard and refractory materials. The attempts to obtain cubic tungsten carbide in a dispersed and bulk form are known [11,12,13,14,15,16,17], until now, methods of synthesis of WC1-x are not effective enough. Plasma dynamic synthesis is used to synthesize cubic tungsten carbide, since it provides the heating to a high temperature required for the formation of this phase and rapid cooling.

Results

Conclusion