| 合金元素Al对Cr-20Nb合金高温抗氧化性能的影响 |
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| 引用本文： | 黄毅,鲁世强,郑海忠.合金元素Al对Cr-20Nb合金高温抗氧化性能的影响[J].航空材料学报,2009,29(6):8-12. |
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| 作者姓名： | 黄毅 鲁世强 郑海忠 |
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| 作者单位： | 南昌航空大学,材料科学与工程学院,南昌,330063 |
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| 基金项目： | 国家自然科学基金，航空科学基金，江西省自然科学基金 |
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| 摘 要： | 采用机械合金化＋热压烧结工艺制备了掺杂合金元素Al的Cr-20Nb合金，研究Al对Cr-20Nb合金在1100℃和1200℃下高温抗氧化性的影响。结果表明，合金元素Al能促进Cr-20Nb合金氧化时生成AlNbO4复合型氧化物，该复合型氧化物能有效抑制Cr2O3，的挥发反应，从而改善Cr2O3，氧化层的致密性，并提高氧化膜的粘附性，导致合金抗氧化性显著提高。不同Al含量的Cr-20Nb合金氧化增重均近似于抛物线规律。
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| 关 键 词： | Cr-20Nb合金 合金元素A1 高温抗氧化 |
Effect of Al on High Temperature Oxidation Resistance of Cr-20Nb Alloy |
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| HUANG Yi,LU Shi-qiang,ZHENG Hai-zhong.Effect of Al on High Temperature Oxidation Resistance of Cr-20Nb Alloy[J].Journal of Aeronautical Materials,2009,29(6):8-12. |
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| Authors: | HUANG Yi LU Shi-qiang ZHENG Hai-zhong |
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| Institution: | HUANG Yi,LU Shi-qiang,ZHENG Hai-zhong(Department of Material Science and Engineering,Nanchang Hangkong University,Nanchang 330063,China) |
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| Abstract: | The influence of Al on the high temperature oxidation of Cr-20Nb alloys, which were fabricated by mechanical alloy and hot press, has been studied at 1100℃ and 1200℃ in air, respectively. The results indicate that the proper addition of Al promote the formation of AlNbO_4 complex oxide which retard the volatilization of Cr_2O_3 scales. Thus the compactability of Cr_2O_3 scales and the adherence of the oxide scale are improved, which lead to the oxidation resistance remarkably improved. The results also show that the oxidation kinetics of Cr-20Nb alloys with different Al content is similar to parabolic law. |
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| Keywords: | Cr-20Nb alloys Al addition high temperature oxidation resistance |
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