择优取向对热压/热变形纳米NdFeB磁体腐蚀行为的影响

腐蚀学报（英文）, 2014, 26(2): 119-124.

择优取向对热压/热变形纳米NdFeB磁体腐蚀行为的影响

张雪 ^1, , 马元泰 ^2, , 雷明凯 ^3, , 李瑛 ^4, , 王福会 ^5, , 朱明刚 ^6, , 汪旭超 ^7,

1.大连理工大学材料科学与工程学院大连116023;中国科学院金属研究所腐蚀与防护国家重点实验室沈阳110016

2.中国科学院金属研究所腐蚀与防护国家重点实验室沈阳110016

3.大连理工大学材料科学与工程学院大连116023

4.中国科学院金属研究所腐蚀与防护国家重点实验室沈阳110016

5.中国科学院金属研究所腐蚀与防护国家重点实验室沈阳110016

6.钢铁研究总院功能材料研究所北京100081

7.钢铁研究总院功能材料研究所北京100081

基金项目: 国家基础研究项目(2010CB934604) 国家自然科学基金项目(51131007和50801063)

关键词：纳米晶 , NdFeB , 电化学 , XPS

Effect of Preferred Orientation on Corrosion Behavior of Hot-pressed and Hot-deformed Nanocrystalline NdFeB Magnet

Keywords： nanocrystalline , NdFeB , electrochemistry , XPS

利用电化学测试技术和材料分析方法研究了择优取向对热压/热变形纳米NdFeB磁体腐蚀行为的影响.结果表明:不同取向的热压/热变形纳米NdFeB磁体的腐蚀行为相似,但与取向轴平行截面相比,与取向轴垂直截面具有更大的局部腐蚀倾向性以及更快的溶解速率;不同取向的热压/热变形纳米NdFeB磁体均发生Nd的优先腐蚀,且与取向轴垂直截面腐蚀产物膜中O的原子分数略大;富Nd相面积分数以及晶界数的差异是导致不同取向的热压/热变形纳米NdFeB磁体腐蚀行为差异的主要原因.

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