论文部分内容阅读
为研究氧化钨的形貌结构对纳米钨粉末制品均匀性的影响,用X射线衍射分析仪和电子扫描电镜对普通黄钨在660℃下还原的过程产物进行了分析、观测。同时分别以普通黄钨和强力球磨分级处理的细黄钨为原料,采用经优化的工艺条件制备出了纳米W、WC粉末,并对粉末及其快速烧结体的显微组织结构进行了观察、分析。结果表明,不同形貌结构原料制备的纳米W、WC粉末,均呈现出不同程度的形貌结构遗传特性,强力球磨分级处理所获细黄钨颗粒细小、形貌结构疏松,更容易制备出结构较疏松,分散性较好的纳米W、WC粉末。
In order to study the influence of topography of tungsten oxide on the uniformity of nano-tungsten powder, the products of reduction of common yellow tungsten at 660 ℃ were analyzed by X-ray diffraction analyzer and scanning electron microscope. At the same time, using the fine yellow tungsten treated by the ordinary yellow tungsten and the strong ball milling respectively as raw materials, the nano W and WC powders were prepared by the optimized process conditions, and the microstructure of the powder and the rapidly sintered body were observed. analysis. The results showed that nano-W and WC powders prepared from different morphological structure materials all showed different degree of genetic structure. The fine-grained Hg particles obtained by gravimetric ball milling were fine and the morphological structure was loose and the structure was easier to be prepared More loose, decentralized nano W, WC powder.