Formation of α-alumina scales in the Fe-Al(Cr) diffusion coating on China low activation martensitic steel

被引：14

作者：

Zhan, Qin ^{[1
]}

Zhao, Weiwei ^{[1
]}

Yang, Hongguang ^{[1
]}

Hatano, Yuji ^{[2
]}

Yuan, Xiaoming ^{[1
]}

Nozaki, Teo ^{[2
]}

Zhu, Xinxin ^{[1
]}

机构：

[1] China Inst Atom Energy, Beijing 102413, Peoples R China

[2] Toyama Univ, Hydrogen Isotope Res Ctr, Toyama 9308555, Japan

来源：

JOURNAL OF NUCLEAR MATERIALS | 2015年 / 464卷

关键词：

OXIDATION BEHAVIOR; DESIGN;

D O I：

10.1016/j.jnucmat.2015.04.038

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

To study the formation mechanism of stable alpha-Al2O3 scales, the oxidation behavior of Fe-Al(Cr) diffusion coating on China low activation martensitic steel has been investigated under the oxygen partial pressure ranging from 1 to 20,000 Pa at 1253 K. A single, continuous Al2O3 scale with the maximum thickness of about 2000 nm was formed on the Fe-Al(Cr) diffusion layer. The phase transformation of alumina scales on the surface of Fe-Al(Cr) layer was studied at different oxidation times ranging from 3 to 180 min. With the increase in oxygen partial pressure, the phase transformation time of alpha-Al2O3 is decreased. The metastable gamma-Al2O3 and transition alpha-(Al0.948Cr0.052)(2)O-3 phases were formed in the earlier oxidation process and finally transformed to the stable alpha-Al2O3 phase, which were detected by grazing incidence angle X-ray diffraction and confirmed by transmission electron microscopy. This implies that Cr shows the third element effect and serves as a template for the nucleation of the stable alpha-Al2O3. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：135 / 139

页数：5

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