Effect of process parameters on inductionplasma reactive deposition of tungstencarbide from tungsten metal powder

来源期刊：中国有色金属学报(英文版)2001年第5期

论文作者：蒋显亮 M.I.Boulos

文章页码：639 - 643

Key words：induction plasma; tungsten carbide; deposit; carburization; phase composition

Abstract: Tungsten carbide deposit was made directly from tungsten metal powder through the reaction with methane in radio frequency induction plasma. Effect of major process parameters on the induction plasma reactive deposition of tungsten carbide was studied by optical microscopy, scanning electron microscopy, X-ray diffraction analysis, water displacement method, and microhardness test. The results show that methane flow rate, powder feed rate, particle size, reaction chamber pressure and deposition distance have significant influences on the phase composition, density, and microhardness of the deposit. Extra carbon is necessary to ensure the complete conversion of tungsten metal into the carbide.