Oxidation behavior of a new wrought Ni-30Fe-20Cr based alloy at 750 °C in pure steam and the effects of alloyed yttrium

被引：33
作者：
Yang, Zhen [1 ]
Lu, Jin-tao [1 ]
Yang, Zheng [1 ]
Li, Yan [1 ]
Yuan, Yong [1 ]
Gu, Yue-feng [1 ]
机构：
[1] Xian Thermal Power Res Inst Co Ltd, Natl Engn Res Ctr Clean Coal Combust Util Boilers, Xian 710032, Shaanxi, Peoples R China
来源：
CORROSION SCIENCE | 2017年 / 125卷
基金：
中国国家自然科学基金;
关键词：
Alloy; Rare earth elements; SEM; TEM; Oxidation; HIGH-TEMPERATURE OXIDATION; GRAIN-BOUNDARY SEGREGATION; WATER-VAPOR; CHROMIA SCALES; REACTIVE ELEMENTS; NI-CR; GROWTH; IMPLANTATION; DIFFUSION; ADHERENCE;
D O I：
10.1016/j.corsci.2017.06.009
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The oxidation behavior of a Ni-30Fe-20Cr base alloy with/without yttrium was studied in pure steam at 750 degrees C. Results showed that the oxide scale formed was equiaxed Cr2O3 and grew parabolically with time. Underneath the scale, Si, Ti and Al was internally oxidized into SiO2, TiO2 and Al2O3, respectively. Alloying 0.05-0.10 wt.% yttrium reduced the oxidation rate of the alloy by about 2 factors and improved the oxide adherence and also suppressed the internal oxidation. The reason for it probably lies in the decrease of the outward diffusion of chromium along grain boundaries.
引用
收藏
页码：106 / 113
页数：8
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