含V和Cr纳米W粉碳化热力学分析及实验  

Thermodynamic analysis and experiment of carbonization process of nanosized W powder added V_2O_3 and Cr_2O_3

作　　者：罗骥[1] 方哲成[1] 郭志猛[1] 邵慧萍[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083

出　　处：《材料热处理学报》2011年第2期26-29,共4页Transactions of Materials and Heat Treatment

基　　金：广东省产学研重大专项支持项目

摘　　要：根据W、V2O3和Cr2O3碳化反应的热力学分析结果,以含V2O3、Cr2O3各0.5 wt%的纳米W粉为原料,在1100℃真空碳化,制备了含晶粒长大抑制剂(VC、Cr3C2)的纳米WC粉末,其平均粒径小于100 nm。实验结果表明抑制剂在碳化过程中可有效抑制WC颗粒长大。Based on the thermodynamic analysis of carbonization process of W,V2O3 and Cr2O3,the experimental observation of carbonized products of nanosized W powder added V2O3 and Cr2O3 were carried out.The results show that the nanosized tungsten powders with 0.5 wt% V2O3 and 0.5 wt% Cr2O3 is carbonized in vacuum at about 1100 ℃ to prepare ultra-fine WC powders and the average size of WC particles is smaller than 100 nm.The inhibitors of VC and Cr3C2 produced during carbonization process effectively inhibit the particle growth of tungsten carbide powder in the process of carbonization.

关 键 词：抑制剂 纳米WC粉 碳化 热力学 

分 类 号：TF123.7[冶金工程—粉末冶金]