Oxidation resistance of a Zr-doped NiAl coating thermochemically deposited on a nickel-based superalloy
Oxidation resistance of a Zr-doped NiAl coating thermochemically deposited on a nickel-based superalloy
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DOI：
10.1016/j.surfcoat.2009.09.073
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发表时间：
2009-12-25
影响因子：
5.4
通讯作者：
Marcus, P.
中科院分区：
文献类型：
--
作者：
Hamadi, S.;Bacos, M. -P.;Marcus, P.
采用循环氧化、SEM微观结构表征、ToF-SIMS深度剖析、等温氧化和热重分析等方法研究了活性元素Zr对AM 1/NiAl体系氧化行为的影响。虽然Zr显着提高了规模的附着力（spectrometry延迟和避免界面的空腔），它没有重大影响的α-氧化铝生长在稳定的氧化制度。锆仅在氧化的最初几个小时内改变涂层的氧化行为（抛物线恒定速率和空腔），但具有有益的长期后果。Zr在循环氧化后均匀分布在氧化膜中。(C)2009爱思唯尔有限公司版权所有。
The influence of the reactive element Zr on the oxidation behavior of the AM1/NiAl system has been investigated by means of cyclic oxidation combined with SEM microstructural characterizations and ToF-SIMS depth-profiling, and by isothermal oxidations followed by thermogravimetric analyses. Although Zr significantly improves the scale adhesion (spallation is delayed and interfacial cavities are avoided), it has no major effect on the alpha-alumina growth in the stationary regime of oxidation. Zr modifies the coating oxidation behavior (parabolic constant rate and cavities) only during the first hours of oxidation but with beneficial long-term consequences. Zr is homogeneously distributed within the oxide scale after cyclic oxidation. (C) 2009 Elsevier B.V. All rights reserved.