材料科学
烧结
碳化物
原材料
同种类的
钴
降水
硬质合金
相(物质)
共沉淀
化学工程
微观结构
冶金
矿物学
化学
气象学
有机化学
工程类
物理
热力学
作者
Qing Yang,Jiangao Yang,Weiping Yan,Qinying Zhang,Liyong Chen,Hao Chen
标识
DOI:10.1016/j.jallcom.2018.03.197
摘要
In this study, a solution chemical route for the synthesis of ultrafine WC-15 wt %Co cemented carbides was proposed with WC-6Co aggregates as raw materials. The chemical Co was uniformly distributed around the WC-6Co aggregates and the Co layers in the raw materials had been well preserved. During sintering, the chemical Co could diffuse along the Co layers and thus avoid the aggregation and growth of WC grains. Additionally, the homogeneous distribution of Co phase and the existent of Co layers promoted the WC reprecipitations on the same crystal during the solution/re-precipitation process. The fine WC grains and the homogeneous of WC and Co phases resulted in the high hardness and transverse rupture strength.
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