| Hydrogen Embrittlement Processes and AL／AL2O3 Hydrogen Resistance Coatings of NdFeB Magnets |
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| 引用本文： | 张万里,彭斌,蒋洪川,张文旭,杨仕清. Hydrogen Embrittlement Processes and AL／AL2O3 Hydrogen Resistance Coatings of NdFeB Magnets[J]. 中国稀土学报(英文版), 2004, 22(5): 636-639 |
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| 作者姓名： | 张万里 彭斌 蒋洪川 张文旭 杨仕清 |
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| 作者单位： | SchoolofMicroelectronicsandSolid-StateElectronics,UniversityofElectronicScienceandTechnologyofChina,Chengdu610054,China |
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| 基金项目： | ProjectsupportedbyAdvancedNationalDefenseFoundation ( 99J12 .3 .1) |
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| 摘 要： | After analyzing the phenomena and processes of hydrogen embrittlement of NdFeB permanent magnets, RF magnetron sputtering was used to fabricate A1 thin films and then oxidized to form the Al/Al2O3 composite films on the magnets as the hydrogen resistance coatings. SEM and EDS were used to examine the morphology and composition respectively. Hy-drogen resistance performance was tested by exposing the magnets in 10 MPa hydrogen gas at room temperature. The results show that the magnets with 8μm Al/Al2O3 coatings can withstand hydrogen of 10 MPa for 65 min without being embrittledinto powd er. The samples with and without hydrogen resistance coatings have almost the same magnetic properties.
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| 关 键 词： | 金属材料 稀土元素 氢电镀 铝膜 NdFeB 永久磁铁 氢脆钢 |
Hydrogen Embrittlement Processes and Al/Al2O3 Hydrogen Resistance Coatings of NdFeB Magnets |
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| Zhang Wanli ,Peng Bin,Jiang Hongchuan,Zhang Wenxu,Yang Shiqing. Hydrogen Embrittlement Processes and Al/Al2O3 Hydrogen Resistance Coatings of NdFeB Magnets[J]. Journal of Rare Earths, 2004, 22(5): 636-639 |
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| Authors: | Zhang Wanli Peng Bin Jiang Hongchuan Zhang Wenxu Yang Shiqing |
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| Affiliation: | Zhang Wanli ~*,Peng Bin,Jiang Hongchuan,Zhang Wenxu,Yang Shiqing |
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| Abstract: | After analyzing the phenomena and processes of hydrogen embrittlement of NdFeB permanent magnets,RF magnetron sputtering was used to fabricate Al thin films and then oxidized to form the Al/Al2O3 composite films on the magnets as the hydrogen resistance coatings.SEM and EDS were used to examine the morphology and composition respectively.Hydrogen resistance performance was tested by exposing the magnets in 10 MPa hydrogen gas at room temperature.The results show that the magnets with 8 μm Al/Al2O3 coatings can withstand hydrogen of 10 MPa for 65 min without being embrittled into powder.The samples with and without hydrogen resistance coatings have almost the same magnetic properties. |
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| Keywords: | metal materials hydrogen resistance coatings hydrogen embrittlement aluminium/alumina film NdFeB permanent magnets rare earths |
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