Abstract

The results of plasma dynamic synthesis of nanocrystalline cubic tungsten carbide using a system based on a coaxial magnetoplasma accelerator are presented. It is found that an atomic ratio of C/W precursors of about 2.5 is necessary to achieve the maximum yield of the unique cubic phase of tungsten carbide WC_{1 – x} (up to 95%). The synthesized materials are analyzed by transmission electron microscopy to assess the formation of the structure of nanocrystalline particles depending on the ratio of carbon and tungsten filling. It is found that particles with a core–shell structure are formed in the system, and the thickness of the shells increases with an increase in the amount of carbon in the mixture of initial components.

中文翻译：

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纳米晶WC 1-x的等离子体动态合成及其产物结构对前驱体比例的依赖

摘要

提出了使用基于同轴磁等离子体加速器的系统进行等离子体动态合成纳米晶立方碳化钨的结果。发现必须达到约2.5的C / W前驱体原子比，才能获得碳化钨WC _{1 – x}独特立方相的最大产率（最高95％）。通过透射电子显微镜分析合成的材料，以根据碳和钨填充的比例评估纳米晶体颗粒结构的形成。发现在系统中形成了具有核-壳结构的颗粒，并且壳的厚度随着初始组分混合物中碳含量的增加而增加。