碳源对超细WC-Co复合粉末性能的影响  

Effect of Carbon Resource on the Properties of Ultrafine WC-Co Composite Powders

作　　者：吕健[1] 王忠华 尚根峰 羊建高[1] 方春生 王韶毅 

机构地区：[1]江西理工大学工程研究院,江西赣州341000 [2]江西理工大学材料科学与工程学院,江西赣州341000 [3]赣州澳克泰工具技术有限公司,江西赣州341000

出　　处：《中国钨业》2016年第6期41-45,共5页China Tungsten Industry

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。Two kinds of ultrafine WC-Co composite powders were prepared by spray-drying and low temperature reduction-carbonization process, using organic carbon and super pure carbon black as carbon source for each and soluble tungsten salt and cobalt salt as raw material. The carbon content, oxygen content, bulk density of the powder, BET surface area and Malvern particle size distribution were measured, the morphology and phase composition were also identified. The effect of carbon resource on the properties of ultrafine WC-Co composite powders was studied. The results show that the composite powders prepared by different carbon source are both shell spherical structured, their BET surface area are bigger than 2 m2/g, particle size are in the range of 100~200 nm, the average particle size of ball shell in the range of 30 ~50 μm. The porosity between primary particles of composite powder prepared by organic carbon is bigger than composite powder prepared by carbon black, the thickness of the shell spherical skeleton ball is thinner, bulk density of the powder is lower and the temperature and time of reduction-carbonization that need is lower and shorter.

关 键 词：超细WC-Co复合粉末 有机碳 炭黑 喷雾干燥 低温还原碳化 

分 类 号：TB383.3[一般工业技术—材料科学与工程]