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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Microstructural design and oxidation resistance of CoNiCrAlY alloy coatings in thermal barrier coating system
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Microstructural design and oxidation resistance of CoNiCrAlY alloy coatings in thermal barrier coating system

机译：热障涂层系统中CoNiCrAlY合金涂层的组织设计和抗氧化性能

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摘要

This paper aims to improve the oxidation resistance of plasma-sprayed CoNiCrAlY coatings by optimizing microstructure. A series of coatings that contained 22.5 +/- 2.3%, 35.4 +/- 2.2%, and 57.8 +/- 2.5% unmelted particles were fabricated by a high efficiency supersonic plasma spraying (SAPS) system. Experimental results showed that the beta phase mainly existed in the unmelted particles, and its content increased with increasing the content of unmelted particles. The coating that contained 35.4 +/- 2.2% unmelted particles showed the best oxidation resistance. An accurate numerical model obtained from molecular dynamics simulation was used to explain the experimental results. Our study confirmed that an appropriate amount of unmelted particles can improve the oxidation resistance of CoNiCrAlY coating. (C) 2016 Elsevier B.V. All rights reserved.
机译：本文旨在通过优化微观结构来提高等离子喷涂CoNiCrAlY涂层的抗氧化性。通过高效超声等离子体喷涂（SAPS）系统制造了一系列包含22.5 +/- 2.3％，35.4 +/- 2.2％和57.8 +/- 2.5％的未熔融颗粒的涂料。实验结果表明，β相主要存在于未熔颗粒中，其含量随着未熔颗粒含量的增加而增加。包含35.4 +/- 2.2％未熔融颗粒的涂层表现出最佳的抗氧化性。从分子动力学模拟获得的精确数值模型用于解释实验结果。我们的研究证实，适量的未熔化颗粒可以提高CoNiCrAlY涂层的抗氧化性。 （C）2016 Elsevier B.V.保留所有权利。

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