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.
出处
《中国钨业》
CAS
北大核心
2016年第6期41-45,共5页
China Tungsten Industry
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
uhrafine WC-Co composite powders
organic carbon
carbon black
spray-drying
low temperaturereduction-carbonization
作者简介
吕健（1988-），男，江西崇义人，硕士，主要从事钨基粉末及硬质合金制备新技术研究。
通讯作者：羊建高（1958-），男，湖南邵阳人，教授，本刊编委，主要从事硬质合金新材料研究。
