乙烯基和玻璃陶瓷作为镍基超合金镀铝过程中复合防渗掩蔽层的演变机理

IF 4.9 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2024-11-06 DOI:10.1016/j.colsurfa.2024.135732

Dai Yan-zhang , Zou Jian-peng , Shi Qian , Li Xiao-ya , Wei Hong-ming

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引用次数: 0

摘要

本研究利用复合防渗掩蔽层来保护镍基超合金，防止铝在镀铝过程中沉积，从而满足涡轮叶片的各种应用要求。同时，未遮蔽区域模拟叶片机翼，以形成镀铝涂层。在 800 ∼ 1000 ℃ 下镀铝后，对乙烯基涂层和玻璃陶瓷涂层的防渗效果进行了评估。结果表明，乙烯基涂层能阻止铝在 800 ℃ 下扩散到基底中，在更高温度下会发生降解。然而，添加玻璃陶瓷涂层可显著提高高温稳定性，并抑制乙烯基涂层的流动性。在 GH4169、DZ22B 和 K477 超合金上，乙烯基涂层和玻璃陶瓷涂层两次涂覆的复合防渗掩蔽层表现出优异的防渗掩蔽性能，既能提供保护，又易于清除，不会影响未掩蔽区域。这种方法可提高涡轮叶片的综合性能，同时满足燕尾和翼面部分的要求。

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The evolution mechanism of ethylene-based and glass-ceramic as composited anti-seepage masking layer for Ni-based superalloy during aluminizing

This study addresses the diverse application requirements of turbine blades by utilizing a composite anti-seepage masking layer to protect the Ni-based superalloy from Al deposition during aluminizing. Simultaneously, the unmasked areas simulate blade airfoils for aluminized coating formation. Ethylene-based and glass-ceramic coatings were evaluated for anti-seepage effectiveness after aluminizing at 800 ∼ 1000 ℃. The results reveal that ethylene-based coatings prevent Al diffusion into the substrate at 800 ℃, and degradation occurs at higher temperatures. However, adding a glass-ceramic coating significantly enhances high-temperature stability and suppresses ethylene-based coating fluidity. The composited anti-seepage masking layer, with the ethylene-based and glass-ceramic coating applied twice, exhibits excellent anti-seepage masking performance on GH4169, DZ22B, and K477 superalloys, providing protection and easy removal without affecting unmasked areas. This approach improves the comprehensive performance of turbine blades, meeting the requirements of both dovetail and airfoil sections.

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来源期刊

Colloids and Surfaces A: Physicochemical and Engineering Aspects 化学-物理化学

CiteScore

8.70

自引率

9.60%

发文量

2421

审稿时长

56 days

期刊介绍： Colloids and Surfaces A: Physicochemical and Engineering Aspects is an international journal devoted to the science underlying applications of colloids and interfacial phenomena. The journal aims at publishing high quality research papers featuring new materials or new insights into the role of colloid and interface science in (for example) food, energy, minerals processing, pharmaceuticals or the environment.