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首页> 外文会议>2003 International Thermal Spray Conference Vol.2; May 5-8, 2003; Orlando, Florida, USA >Interconnected Porosity of Plasma Sprayed Alumina Coatings: Evaluation and Modification
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Interconnected Porosity of Plasma Sprayed Alumina Coatings: Evaluation and Modification

机译：等离子喷涂氧化铝涂层的互连孔隙率：评估和改进

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摘要

For electrical or thermal insulation, the porosity of an air plasma sprayed (APS) coating is an important property to control. Moreover in aggressive environment the interconnected porosity is responsible for the substrate corrosion. To solve, at least partially, this problem, deposition by mutitechniques (APS and a PECVD) was used to close interconnected and opened porosities. In this study, titanium alloy (TA6V) substrates were coated by alumina using either one or both deposition processes. Electrochemical characterization technique was used to evaluate the open porosity in alumina coatings. It consists of evaluating the polarization resistance of the reference sample surface (uncoated substrate) and to compare it to coated ones. After different tests for selecting the electrolyte solution, the influences of different parameters (thickness and relative position)of each deposition process on coating porosity were examined.
机译：对于电绝缘或热绝缘，空气等离子喷涂（APS）涂层的孔隙率是控制的重要属性。此外，在侵蚀性环境中，互连的孔隙率是造成基材腐蚀的原因。为了至少部分地解决该问题，使用了多种技术（APS和PECVD）进行沉积以封闭互连和开放的孔隙。在这项研究中，钛合金（TA6V）基板使用一种或两种沉积工艺通过氧化铝进行涂覆。电化学表征技术用于评估氧化铝涂层的开孔率。它包括评估参考样品表面（未涂覆的基材）的极化电阻，并将其与涂覆的样品进行比较。在选择电解液的不同测试之后，检查了每个沉积工艺的不同参数（厚度和相对位置）对涂层孔隙率的影响。

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