| 快淬Nd-Fe-B磁粉表面的包覆工艺 |
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| 引用本文： | 孟艳,曹力军,杨远刚,曾振鹏,吴建生.快淬Nd-Fe-B磁粉表面的包覆工艺[J].上海交通大学学报,2002,36(1):55-58. |
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| 作者姓名： | 孟艳 曹力军 杨远刚 曾振鹏 吴建生 |
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| 作者单位： | 上海交通大学,教育部高温材料及高温测试开放实验室,上海,200030 |
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| 基金项目： | 国家自然科学基金资助项目 ( 5 0 0 710 35 ) |
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| 摘 要： | 快淬Nd-Fe-B 粘结磁粉极易发生氧化和腐蚀，导致粘结磁体性能降低，为此，采用重铬酸盐钝化工艺，硅烷耦联剂包覆工艺，重铬酸盐钝化还原工艺以及重铬酸盐钝化还原－硅烷复合包覆工艺对Nd-Fe-B磁粉进行表面包覆，并采用热氧化增重实验及差示扫描量热分析仪测定包覆处理前后快淬Nd-Fe-B磁粉的抗氧化性能，进而比较各种表面处理工艺的优劣，结果表明，上述工艺方法均能改善Nd-Fe-B磁粉的抗氧化性能，进而比较各种表面处理工艺的优劣，结果表明，上述工艺方法均能改善Nd-Fe-B磁粉的抗氧化性，其中以硅烷耦联剂处理工艺，重铬酸盐纯化还原－硅烷复合包覆处理工艺形成的表面保护层的抗氧化性能为佳。
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| 关 键 词： | 快淬Nd－Fe－B磁粉 表面包覆处理 抗氧化性能 磁性能 快淬钕－铁－硼磁粉 |
| 文章编号： | 1006-2467(2002)01-0055-04 |
| 修稿时间： | 2001年1月19日 |
Surface Treatment of Rapidly Quenching Nd-Fe-B Magnetic Powder |
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| MENG Yan,CAO Li jun,YANG Yuan gang,ZENG Zhen peng,WU Jian sheng.Surface Treatment of Rapidly Quenching Nd-Fe-B Magnetic Powder[J].Journal of Shanghai Jiaotong University,2002,36(1):55-58. |
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| Authors: | MENG Yan CAO Li jun YANG Yuan gang ZENG Zhen peng WU Jian sheng |
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| Abstract: | The powders from rapid quenched NdFeB are extremely easy to be oxidized and corroded. It deteriorates the magnetic properties of the bonded magnets. The NdFeB powders are covered using dichromate passivation technology, silicon alkane covering technology, dichromate passivation reducing technology and dichromate passivation reducing plus silicon alkane covering technology. The oxidation resistance of the powders from rapid quenched NdFeB before and after covering is measured here using oxidation and weight increasing method, differential scanning calorimeter (DSC), and the different technologies are compared. It is shown that the oxidation resistance of the best one of them is the silicon alkane covering technology and dichromate passivation reducing plus silicon alkane covering technology. |
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| Keywords: | surface coating oxidation resistance magnetic properties rapidly quenching Nd Fe B magnetic powder |
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