Self-similar scaling of discharge events through PEO coatings on aluminium
Self-similar scaling of discharge events through PEO coatings on aluminium
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DOI：
10.1016/j.surfcoat.2011.07.065
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发表时间：
2011-12-15
影响因子：
5.4
通讯作者：
Clyne, T. W.
中科院分区：
文献类型：
--
作者：
Dunleavy, C. S.;Curran, J. A.;Clyne, T. W.
等离子体电解氧化（PEO）通常涉及每秒每平方毫米数百至数千次放电。在目前的工作中，个人放电的特性进行了测量和调查，通过超过370万个单独的事件的实验调查。所考虑的参数包括放电事件开始时的电压、放电事件发展到的峰值电流、放电的持续时间以及各个放电的电流-时间曲线。它示出，有一个很强的相关性之间的电压，放电事件开始和峰值电流，它随后发展。这些特征和放电持续时间之间也有很强的相关性。这些相关性表明涂层厚度没有显著影响。大多数放电的电流-时间曲线都是相似的，根据起始电压缩放，这表明所有PEO放电事件，无论是弱的还是强的，都根据相同的物理机制发展。(C)2011 Elsevier B. V.保留所有权利。
Plasma electrolytic oxidation (PEO) typically involves hundreds to thousands of discharges per square millimetre per second. In the present work, the characteristics of individual discharges are measured and investigated through an experimental survey of over 3.7 million individual events. The parameters considered include the voltage at which a discharge event commences, the peak current to which it develops, the duration of the discharge, and the current-time profile of individual discharges. It is shown that there is a strong correlation between the voltage at which a discharge event commences and the peak current to which it subsequently develops. There are also strong correlations between these characteristics and the duration of the discharges. These correlations show no significant influence of the coating thickness. The current-time profile is similar for most discharges, scaling according to the initiation voltage, suggesting that all PEO discharge events, whether weak or powerful, all develop according to the same physical mechanisms. (C) 2011 Elsevier B.V. All rights reserved.