Junkai Liu , Yuqi Xie , Junhui Luo , Qian Li , Fen Zhao , Li Yang , Yichun Zhou
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引用次数: 0
摘要
通过实验以及热力学和动力学模拟，研究了实际燃气轮机中高温氧化气氛下 EB-PVD 沉积 CoCrAlY 涂层与超合金基体之间的相互扩散机制。由于使用温度不同，叶片不同区域的相互扩散行为也不同。研究并讨论了元素间扩散和相变行为。由于γ→γ'转变以及铬、钨和钼的上坡扩散，在二次反应区内析出了针状拓扑紧密堆积相和σ-铬钴镍相。降低 MCrAlY 键合涂层中的 Co 含量可在一定程度上抑制相互扩散行为。
Interdiffusion mechanism between EB-PVD deposited CoCrAlY bond-coat and superalloy substrate under high-temperature oxidation service conditions in gas turbine
The interdiffusion mechanism between EB-PVD deposited CoCrAlY coating and superalloy substrate under high-temperature oxidation atmosphere in actual gas turbines was investigated both experimentally and through thermodynamics and kinetics simulation. The interdiffusion behavior differs at different regions of blade due to the different service temperatures. The elemental interdiffusion and phase transformation behavior were investigated and discussed. Needle-like topologically close-packed phase and σ-CrCoNi phase have precipitated within the secondary reaction zone due to the γ→γ’ transition and the uphill diffusion of Cr, W, and Mo. Decreasing the Co content in the MCrAlY bond-coat can inhibit the interdiffusion behavior to a certain extent.
期刊介绍：
Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies.
This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.
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