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1.序言熔点和硬度特别高的、耐腐蚀又好的过渡金属碳化物在工业上之所以重要,不仅仅是作为超硬机械切削刀具的成份,而且也作为高温结构材料。碳化物粉末主要是用金属或金属氧化物与碳的固相反应来制备。然而,应用气相反应(法)制备碳化物是使人感兴趣的,因为这一方法得到超细的和相当好的烧结性能的粉末。在本文中,研究了氯化钼—甲烷—氢系碳化钼的生成,并着重研究反应条件对碳化物粉末相成份及其粒度的影响。
1. Introduction The melting point and the particularly high hardness, corrosion-resistant and good transition metal carbide is of industrial importance, not only as a component of the superhard mechanical cutting tool, but also as a high-temperature structural material. Carbide powders are mainly prepared by the solid-phase reaction of a metal or metal oxide with carbon. However, the use of gas phase reaction to produce carbides is of interest as this process results in powders that are ultra-fine and have fairly good sintering properties. In this paper, the formation of molybdenum chloride-methane-hydrogen-based molybdenum carbide was studied, and the influence of reaction conditions on the composition and particle size of carbide powder was studied.