Effect of alloyed Lu, Hf and Cr on the oxidation and spallation behavior of NiAl

Effect of alloyed Lu, Hf and Cr on the oxidation and spallation behavior of NiAl
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合金化Lu、Hf、Cr对NiAl氧化和剥落行为的影响

DOI:
10.1016/j.corsci.2017.07.016
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发表时间:
2017-09
期刊:
影响因子:
8.3
通讯作者:
Ping Xiao
Ping Xiao
中科院分区:
材料科学1区
文献类型:
--
作者:
Chunshan Zhao;Yuhua Zhou;Zhonghua Zou;Lirong Luo;Xiaofeng Zhao;Fangwei Guo;Ping Xiao

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研究了Lu、Hf、Cr合金化对NiAl氧化和溅射行为的影响。虽然Lu与Hf一样对Al具有“阻挡效应”,但Lu掺杂的NiAl氧化速率明显高于Hf掺杂的NiAl,这是由于:(1)在氧化初期阻碍了θ-向α-Al 2 O3的转变;(2)更强的尺度晶粒细化效应和氧传输速率。S和C的偏聚不仅发生在合金/氧化膜界面处,而且发生在氧化膜内部。Lu和Hf均能显著提高氧化膜的粘附性。然而,这种有益的效果可以容易地被Cr过度补偿。
The influences of alloyed Lu, Hf and Cr on the oxidation and spallation behavior of NiAl were investigated. Although Lu has a “block effect” of Al as Hf does, the oxidation rate of Lu-doped NiAl is significantly higher, due to: (1) inhibitation of θ- to α-Al2O3transformation in early oxidation stage; (2) stronger scale grain refinement effect and enhanced oxygen transport rate. Segregation of S and C occurs not only at the alloy/scale interface, but also within the scale. Both Lu and Hf can significantly improve the scale adherence. However, This beneficial effect can be easily overcompensated by Cr.
DOI: 10.1016/s0040-6090(97)00586-5
发表时间: 1997-10
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