Yuan Xiaokun, Ji Yuan
College of Materials Science and Engineering, Beijing University of Technology Beijing 100124 China
Institute of Microstructure and Property of Advanced Materials, Beijing University of Technology Beijing 100124 China.
RSC Adv. 2018 Oct 8;8(60):34468-34475. doi: 10.1039/c8ra03186j. eCollection 2018 Oct 4.
To study the aspect ratio distribution of carbide grains in WC-Co composites, two novel approaches, namely grain shape ellipse calculation and five parameter analysis (FPA) methods, are reported in this work. According to grain shape ellipse calculation, carbide grains that have a grain shape aspect ratio of 0.62 demarcate the more anisotropic grains with a larger size and the less anisotropic grains with a smaller size. Moreover, these grains remained predominantly populous under different cases of structural parameters and processing factors. According to five parameter analysis, the interface area aspect ratio can be derived from the relative area of prevalent (0001) basal planes and (10-10) prismatic planes, and can then be set relevance with the measured mechanical properties. The present work therefore offers new alternatives to establish the connection between the aspect ratio measurement and the property optimization of WC-Co composites.
为研究WC-Co复合材料中碳化物晶粒的纵横比分布，本文报道了两种新方法，即晶粒形状椭圆计算法和五参数分析法（FPA）。根据晶粒形状椭圆计算，纵横比为0.62的碳化物晶粒划分出尺寸较大的各向异性更强的晶粒和尺寸较小的各向异性较弱的晶粒。此外，在不同结构参数和加工因素情况下，这些晶粒数量仍占主导。根据五参数分析，界面面积纵横比可由普遍存在的（0001）基面和（10-10）棱柱面的相对面积得出，进而可与测得的力学性能建立关联。因此，本研究为建立WC-Co复合材料纵横比测量与性能优化之间的联系提供了新的选择。
