Oxidation Behavior of Binary Aluminium-Rich Fe-Al Alloys with a Fine-Scaled, Lamellar Microstructure

被引：11
|
作者：
Scherf, A. [1 ]
Janda, D. [1 ]
Yazdi, M. Baghaie [2 ]
Li, X. [3 ]
Stein, F. [3 ]
Heilmaier, M. [1 ]
机构：
[1] Karlsruhe Inst Technol, Inst Appl Mat, D-76021 Karlsruhe, Germany
[2] Tech Univ Darmstadt, Inst Mat Sci, Darmstadt, Germany
[3] Max Planck Inst Eisenforsch GmbH, Struct & Nano Micromech Mat, D-40074 Dusseldorf, Germany
来源：
OXIDATION OF METALS | 2015年 / 83卷 / 5-6期
关键词：
FeAl; FeAl2; Oxidation; Microstructure; HIGH-TEMPERATURE OXIDATION; ISOTHERMAL OXIDATION; IRON; ZR; STRESS; GROWTH; INTERMETALLICS; DIFFRACTION; ALPHA-AL2O3; KINETICS;
D O I：
10.1007/s11085-015-9535-6
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The oxidation behavior of binary Fe-Al alloys with an aluminum content between 58 and 64 at.% was studied by isothermal and cyclic oxidation experiments in a temperature range of 900-1000 A degrees C. The parabolic rate constants were determined to be comparable to those of B2-ordered Fe-48Al. All investigated alloys exhibited a fine-scaled, lamellar microstructure (< 300 nm lamellar spacing), which was a result of the eutectoid decomposition of the high-temperature phase Fe5Al8 into FeAl and FeAl2. None of these two phases showed a preferential oxidation. At 900 A degrees C theta-Al2O3 formed, whereas at 1000 A degrees C a transformation of the initially formed theta-Al2O3 to the slower growing and passivating alpha-Al2O3 was confirmed by grazing incidence X-ray diffraction measurements.
引用
收藏
页码：559 / 574
页数：16
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