Stages in the tribologically-induced oxidation of high-purity copper
Stages in the tribologically-induced oxidation of high-purity copper
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DOI：
10.1016/j.scriptamat.2018.05.008
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发表时间：
2018-08-01
影响因子：
6
通讯作者：
Greiner, Christian
中科院分区：
文献类型：
--
作者：
Liu, Zhilong;Patzig, Christian;Greiner, Christian
通过摩擦载荷进行表面改性被理解为机械驱动的过程。然而，潜在的复杂化学反应可能至关重要，因为它们的产物会影响接触力学并影响摩擦和磨损。在这里，我们研究了纯铜与蓝宝石球体接触时摩擦驱动的表面氧化。不同的电子显微镜技术揭示了在很少的负载循环后形成（非晶）氧化铜斑块，以及它们在摩擦负载下生长成半圆形非晶/纳米晶氧化亚铜簇。了解这一基本机制对于战略性调整材料微观结构以获得卓越的摩擦学性能至关重要。 (C) 2018 Acta Materialia Inc. 由 Elsevier Ltd 出版。保留所有权利。
Surface modification through tribological loading is understood as a mechanically driven process. Yet, potentially complex chemical reactions can be critical since their products influence contact mechanics and affect friction and wear. Here we investigate the tribologically driven surface oxidation of pure copper in contact with a sapphire sphere. Different electron microscopy techniques reveal the formation of (amorphous) patches of copper oxide after very few loading cycles and their growth to semicircular amorphous/nanocrystalline cuprous oxide clusters under tribological loading. Understanding this elementary mechanism is of the utmost importance for a strategic tailoring of materials' microstructures for superior tribological performance. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.