Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5352992 | Applied Surface Science | 2013 | 9 Pages |
Abstract
We report different corrosion mechanisms for the (1Â 1Â 0), (2Â 0Â 0) and (2Â 1Â 1) crystal faces of tantalum in NH4Br-ethanol solution. With increasing temperature, the BrTa bond was found to readily attract electrons from the [1Â 1Â 0] orientation atomic interlayer due to large layer spacing and weak layer-to-layer interaction, resulting in an easily corroded (1Â 1Â 0) face. On the other hand, short layer spacing and strong interactions between layers led to passivation of the (2Â 0Â 0) and (2Â 1Â 1) faces with increasing temperatures, on account of the fact that the BrTa bond is unable to easily draw electrons from the atomic inter-layers.
Related Topics
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Authors
Youlong Xu, Zhengwei Zhang, Shengchun Mao, Yangzhou Ma,