Microstructure evolution of WC grains in WC–Co–Ni–Al alloys: Effect of binder phase composition
发布时间：2019-04-10
点击次数：
DOI码：10.1016/j.jallcom.2017.03.284
发表刊物：Journal of Alloys and Compounds
摘要：In the present work, the microstructure evolution of WC grains in WC–Co–Ni–Al alloys with different Co–Ni–Al binder phase composition, have been investigated. By combination of thermodynamic calculations and decisive experiments, a series of WC–24 wt.% (Co–Ni–Al) alloys were designed and prepared by liquid phase sintering at 1450 °C for 1 h, 8 h and 20 h, respectively. The influence of Ni3Al content in Co–Ni–Al binder on the WC morphology was investigated by scanning electron microscopy (SEM). The results show that, with the increase of Ni3Al content, the increasing interface energy raises both the energy barrier for two-dimensional (2-D) nucleation and the energy barrier for W migration. Under the influence of these two factors, the micro-faceted and stepped planes on the WC grains become more and more obvious and the WC grains become finer and blunter simultaneously. Combining the thermodynamic calculation with the experiment, the mechanism for WC morphology evolution has been revealed. The mechanical properties of the alloys were also discussed.
合写作者：K. Li, F. Chen, Y. Du, B. Lu, Z. Zhang, Y. Wang, K. Cheng, K. Zhang
第一作者：J. Long
论文类型：期刊论文
通讯作者：M. Yi
卷号：710
页面范围：338-348
是否译文：否
发表时间：2017-07-05
收录刊物：EI、SCI
发布期刊链接：http://www.sciencedirect.com/science/article/pii/S0925838817310861