A Comparison of Static and Cyclic Long-Term Oxidation of Two Nb-Cr-Mo-Si-B Alloys

被引：0
作者：
Kathryn S. Thomas
Shailendra K. Varma
机构：
[1] University of Texas at El Paso,Department of Metallurgical and Materials Engineering
来源：
Metallurgical and Materials Transactions A | 2014年 / 45卷
关键词：
Oxide Scale; Nb2O5; Boron Content; Cyclic Oxidation; Improve Oxidation Resistance;
D O I：
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中图分类号：
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摘要：
Nb-25Cr-20Mo-15Si-10B (compositions in at pct) and Nb-25Cr-20Mo-15Si-15B alloys were exposed to air for a maximum period of 2 weeks under static and cyclic conditions to determine oxidation response. Oxidation was carried out at temperatures of 973 K, 1173 K, 1373 K, and 1573 K (700 °C, 900 °C, 1100 °C, and 1300 °C). Results of long-term cyclic oxidation show an increase in oxidation resistance with an increase in boron content. Pesting has been observed at 973 K (700 °C) in the 10B alloy in cyclic and static modes of oxidation. Comparative analysis of oxide formation is done by the weight gain per unit surface area method. The alloys and their oxides are characterized by X-ray diffraction, scanning electron microscopy, and X-ray mapping.
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页码：1124 / 1135
页数：11
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