Oxidation Behavior of Binary Aluminium-Rich Fe–Al Alloys with a Fine-Scaled, Lamellar Microstructure
Oxidation Behavior of Binary Aluminium-Rich Fe–Al Alloys with a Fine-Scaled, Lamellar Microstructure
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DOI：
10.1007/s11085-015-9535-6
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发表时间：
2015-02
影响因子：
2.2
通讯作者：
A. Scherf;Daniel Janda;M. B. Yazdi;Xiaoling Li;F. Stein;M. Heilmaier
中科院分区：
文献类型：
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作者：
A. Scherf;Daniel Janda;M. B. Yazdi;Xiaoling Li;F. Stein;M. Heilmaier
研究了铝含量为58 ~ 64 at.%的二元Fe-Al合金的氧化行为在900-1000 °C的温度范围内进行了等温和循环氧化实验。抛物线速率常数被确定为与B2-有序Fe-48 Al的速率常数相当。所有研究的合金都表现出细尺度的层状显微组织（<300 nm的片层间距），这是高温相Fe 5Al 8共析分解成FeAl和FeAl 2的结果。这两个阶段都没有表现出优先氧化。在900 °C时形成θ-Al_2 O_3，而在1000 °C时，初始形成的θ-Al_2 O_3转变为生长较慢且钝化的α-Al_2 O_3。
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 °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 Fe5Al8into FeAl and FeAl2. None of these two phases showed a preferential oxidation. At 900 °Cθ-Al2O3formed, whereas at 1000 °C a transformation of the initially formedθ-Al2O3to the slower growing and passivatingα-Al2O3was confirmed by grazing incidence X-ray diffraction measurements.