| NiAl-31Cr-2.9Mo-0.1Hf-0.05Ho定向共晶合金的高温氧化行为(英文) |
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| 引用本文： | 王振生,谢亿,郭建亭,周兰章,胡壮麒,张光业,陈志钢. NiAl-31Cr-2.9Mo-0.1Hf-0.05Ho定向共晶合金的高温氧化行为(英文)[J]. 中国有色金属学会会刊, 2012, 22(7): 1582-1587. DOI: 10.1016/S1003-6326(11)61359-9 |
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| 作者姓名： | 王振生 谢亿 郭建亭 周兰章 胡壮麒 张光业 陈志钢 |
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| 作者单位： | 湖南科技大学机电工程学院;中国科学院金属研究所;湖南省电力公司科学研究院 |
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| 基金项目： | Project(51101055)supported by the National Natural Science Foundation of China |
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| 摘 要： | 采用SEM和XRD等分析手段对NiAl-31Cr-2.9Mo-0.1Hf-0.05Ho定向共晶合金的高温氧化行为进行研究。结果表明,在900~1100°C下合金表面生成连续的Al2O3氧化膜,从而使合金具有良好的抗氧化性能;在1150°C下合金表面的Al2O3氧化膜破裂,氧化增重升高。定向凝固工艺细化合金的组织以及微量稀土元素Ho的加入,均有利于在合金表面形成连续的Al2O3氧化膜。在氧化过程中,表面氧化膜存在着θ-Al2O3→α-Al2O3的相变过程,从而导致1000°C和1050°C氧化增重反常现象的出现。
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| 关 键 词： | 金属间化合物NiAl高温氧化定向共晶合金 |
| 收稿时间： | 2011-09-23 |
High temperature oxidation behavior of directionally solidified NiAl-31Cr-2.9Mo-0.1Hf-0.05Ho eutectic alloy |
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| WANG Zhen-sheng,XIE Yi,GUO Jian-ting,ZHOU Lan-zhang,HU Zhuang-qi,ZHANG Guang-ye,CHEN Zhi-gang. High temperature oxidation behavior of directionally solidified NiAl-31Cr-2.9Mo-0.1Hf-0.05Ho eutectic alloy[J]. Transactions of Nonferrous Metals Society of China, 2012, 22(7): 1582-1587. DOI: 10.1016/S1003-6326(11)61359-9 |
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| Authors: | WANG Zhen-sheng XIE Yi GUO Jian-ting ZHOU Lan-zhang HU Zhuang-qi ZHANG Guang-ye CHEN Zhi-gang |
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| Affiliation: | 1.College of Electromechanical Engineering,Hunan University of Science and Technology,Xiangtan 411201,China; 2.Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China; 3.Hunan Electric Power Corporation Research Institute,Changsha 410007,China |
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| Abstract: | The isothermal oxidation behavior of NiAl-31Cr-2.9Mo-0.1Hf-0.05Ho directional eutectic alloy was investigated with the help of scanning electron microscopy and X-ray diffraction.The results revealed that a continuous Al2O3 scale was formed and owned excellent oxidation resistance in the temperature range of 900-1100°C.When the temperature was up to 1150°C,the continuous Al2O3 oxide film ruptured.Trace rare earth element Ho distributed uniformly in the alloy and relatively high level of Al in Cr(Mo)phase are beneficial to the formation of continuous and compact Al2O3 scale.During the oxidation,a phase transformation fromθ-Al2O3 toα-Al2O3 existed on the surface of oxidation film.It resulted in the abnormal oxidation mass gain happening when the alloy was oxidized at 1000°C or 1050°C. |
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| Keywords: | intermetallic compounds NiAl high temperature oxidation directional eutectic alloy |
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