Scratch testing of WC/Co hardmetals
Scratch testing of WC/Co hardmetals
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DOI：
10.1016/j.triboint.2012.02.027
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发表时间：
2012-10
影响因子：
6.2
通讯作者：
Jonee Zunega;M. Gee;R. Wood;J. Walker
中科院分区：
文献类型：
--
作者：
Jonee Zunega;M. Gee;R. Wood;J. Walker
对两种WC/Co硬质合金细晶和粗晶硬质合金进行了球面金刚石触头的单次划痕和多次划痕试验。利用扫描电子显微镜、原子力显微镜和三维共聚焦显微镜分析了损伤机制随划伤次数的变化。一个有趣的特征是在划痕区域的表面形成了一层薄的摩擦层，随着划痕重复次数的增加，这一点变得更加明显。摩擦系数的变化归因于触针表面形貌的变化和划痕表面摩擦层的形成。
Two grades of WC/Co hardmetals, a fine-grained sample and coarse-grained sample, were tested using single and multiple scratch tests with a spherical diamond stylus. The variation in damage mechanism with increasing number of scratch repeats was analysed using SEM, FIB and 3D confocal microscopy. An interesting feature is the formation of a thin tribo-layer on the surface of the scratched region, which becomes more evident at increased scratch repeats. Variations in the coefficient of friction were attributed to changes in the topography of the stylus and formation of a tribo-layer on the scratched surface.