Oxidation and nitridation analysis of CoNiCrAlY-based composite coatings: Understanding Mn oxide buildup mechanisms in reducing atmosphere at 1000 ℃

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science Pub Date : 2025-05-25 DOI:10.1016/j.corsci.2025.113061

Zitao Jiang, Kang Yang, Shihong Zhang

引用次数: 0

Abstract

The formation mechanism of Mn oxide buildup on CoNiCrAlY, CoNiCrAlY-Al₂O₃, and CoNiCrAlY-ZrB₂ coatings in N₂-3 %H₂ environment at 1000 ℃ were investigated. After 1 h, MnO particles have accumulated on MnAl₂O₄ deposits, which are reinforced by α-Al₂O₃ intermediate layer from CoNiCrAlY coating and by Al₂O₃ particles and precipitates from CoNiCrAlY-Al₂O₃ coating, making the buildup difficult to remove. Oxidation of ZrB₂ on CoNiCrAlY-ZrB₂ coating promotes the mechanical interlocking failure of MnAl₂O₄ deposits with gradual spallation before 5 h. A mixed ceramic layer (α-Al₂O₃/ZrN) from nitridation prevents the secondary MnO accumulation for up to 20 h, indicating excellent resistance to Mn oxide buildup.

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conicraly基复合涂层的氧化和氮化分析：了解1000℃还原气氛中Mn氧化物的形成机制

研究了在N2-3 %H2环境下，1000℃下CoNiCrAlY、CoNiCrAlY- al2o3和CoNiCrAlY- zrb2涂层上Mn氧化物的形成机理。1 h后，MnO颗粒在MnAl2O4堆积物上沉积，并由CoNiCrAlY涂层中的α-Al2O3中间层和CoNiCrAlY-Al2O3涂层中的Al2O3颗粒和沉淀物增强，使堆积物难以去除。ZrB2在CoNiCrAlY-ZrB2涂层上的氧化作用促进了MnAl2O4镀层的机械联锁失效，在5 h之前逐渐剥落。氮化形成的混合陶瓷层（α-Al2O3/ZrN）可防止二次MnO积累长达20 h，表明其具有优异的抗氧化性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Corrosion Science 工程技术-材料科学：综合

CiteScore

13.60

自引率

18.10%

发文量

763

审稿时长

46 days

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.