碳源对超细WC-Co复合粉末性能的影响

发布时间：2018-03-16 15:14

  本文选题：超细WC-Co复合粉末　切入点：有机碳　出处：《中国钨业》2016年06期 　论文类型：期刊论文

【摘要】：分别以有机碳、超纯炭黑为碳源,可溶性钨盐、钴盐为原材料,采用喷雾干燥、低温还原碳化法制备超细WC-Co复合粉末。对两种不同碳源制得的WC-Co复合粉末进行碳含量、氧含量、松装密度、BET比表面积、激光粒度分布测定、形貌观察和物相分析。研究碳源对超细WC-Co复合粉末性能的影响。结果表明:两种碳源制备的复合粉末都呈空壳球形结构,比表面积均大于2 m~2/g,一次颗粒尺寸在100~200 nm之间,空壳球体平均粒径在30~50μm之间。有机碳制备的复合粉末的一次颗粒间孔隙度更高,空壳球体壁厚更薄,粉末松装密度更低,所需的还原碳化温度更低、时间更短。
[Abstract]:Ultrafine WC-Co composite powders were prepared by spray drying and low temperature reduction carbonization with organic carbon, ultrapure carbon black as carbon source, soluble tungsten salt and cobalt salt as raw materials. The effect of carbon source on the properties of ultrafine WC-Co composite powder was studied. The results showed that the composite powder prepared by the two carbon sources had hollow spherical structure. The specific surface area is more than 2 mm2 / g, the primary particle size is between 100 nm and 200 nm, and the average particle size is between 30 ~ 50 渭 m. The composite powder prepared by organic carbon has higher primary intergranular porosity, thinner shell wall thickness and lower loose powder density. The reduction carbonation temperature is lower and the time is shorter.
【作者单位】： 江西理工大学工程研究院;江西理工大学材料科学与工程学院;赣州澳克泰工具技术有限公司;
【分类号】：TF123
，

本文编号：1620470