Chromium carbide powders were synthesized by vacuum-free electric arc method using pure chromium and carbon powder as starting components. The powders obtained in the experimental series were investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM), laser diffraction and differential thermal analysis. In the experiments, electrical parameters were recorded, and the thermal field generated in the reaction zone was measured using an infrared camera and tungsten‑rhenium thermocouples. The study results show the feasibility of plasma arc discharge synthesis of chromium carbide compounds CrC and CrC within 60 s at current intensity of 200 A. SEM analysis of the resulting powder shows that it consists of acute-angled particles of ∼9 to ∼50 μm in size. An updated design of the discharge circuit employed in the study significantly increases the purity of the final product. Vacuum-free electric arc synthesis of chromium carbide has been studied for the first time.

中文翻译：

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无真空电弧等离子体法合成碳化铬粉末


以纯铬和碳粉为原料，采用无真空电弧法合成碳化铬粉末。使用 X 射线衍射 (XRD)、扫描电子显微镜 (SEM) 和透射电子显微镜 (TEM)、激光衍射和差热分析对实验系列中获得的粉末进行了研究。在实验中，记录了电参数，并使用红外相机和钨铼热电偶测量了反应区中产生的热场。研究结果表明，在电流强度为 200 A 的情况下，等离子弧放电在 60 秒内合成碳化铬化合物 CrC 和 CrC 的可行性。所得粉末的 SEM 分析表明，它由 ∼9 至 ∼50 μm 的锐角颗粒组成在尺寸方面。研究中采用的放电电路的更新设计显着提高了最终产品的纯度。首次研究了碳化铬的真空无电弧合成。