Cyclic oxidation and interdiffusion behavior of a NiAlDy/RuNiAl coating on a Ni-based single crystal superalloy

Cyclic oxidation and interdiffusion behavior of a NiAlDy/RuNiAl coating on a Ni-based single crystal superalloy
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镍基单晶高温合金上 NiAlDy/RuNiAl 涂层的循环氧化和相互扩散行为

DOI:
10.1016/j.corsci.2011.04.025
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发表时间:
2011-09
期刊:
影响因子:
8.3
通讯作者:
Peng, Hui
Peng, Hui
中科院分区:
材料科学1区
文献类型:
--
作者:
Bai, Bo;Peng, Liquan;Gong, Shengkai;Guo, Hongbo;Peng, Hui

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在镍基单晶高温合金DD 3上制备了NiAlDy/RuNiAl涂层。研究了NiAlDy/RuNiAl涂层和NiAlDy涂层在1100 °C下的循环氧化和互扩散行为。对于NiAlDy涂层,经100 h退火后,合金中形成了由γ′、γ和σ-拓扑密堆积相(σ-TCP)针状相组成的二次反应区(SRZ)。NiAlDy/RuNiAl涂层有效地抑制了SRZ的形成,因为RuNiAl层起到了缓冲层的作用。循环氧化80 h后,NiAlDy涂层出现了早期氧化膜剥落现象,而NiAlDy/RuNiAl涂层的抗氧化性能有所提高。
A novel NiAlDy/RuNiAl coating was deposited onto a Ni-based single crystal superalloy DD3. The cyclic oxidation and interdiffusion of the NiAlDy/RuNiAl coating and a NiAlDy coating at 1100 °C were investigated. For the NiAlDy coating, secondary reaction zone (SRZ) consisting of γ′, γ and σ-topologically-closed-packed phase (σ-TCP) needles was formed in the superalloy after 100 h annealing. The NiAlDy/RuNiAl coating effectively suppressed the formation of SRZ as the RuNiAl layer worked as a buffer layer. Premature scale spallation was observed on the NiAlDy coating after about 80 h cyclic oxidation, whereas the NiAlDy/RuNiAl coating exhibited improved oxidation-resistance property.
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