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一級(jí)回火和燒結(jié)溫度對(duì)摻Dy2O3的Nd-Fe-B磁性能影響
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國(guó)家自然科學(xué)基金（50701039）；新世紀(jì)優(yōu)秀人才支持計(jì)劃（05-0526）；教育部創(chuàng)新團(tuán)隊(duì)發(fā)展計(jì)劃（IRT0651）


Zhejiang University, Hangzhou 310027, China
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    摘要:

    研究了一級(jí)回火和燒結(jié)溫度T對(duì)摻Dy2O3燒結(jié)釹鐵硼磁體的磁性能和微觀結(jié)構(gòu)的影響。結(jié)果表明：一級(jí)回火和燒結(jié)溫度對(duì)磁體磁性能影響顯著，尤其對(duì)矯頑力Hcj的影響。當(dāng)添加2%（質(zhì)量分?jǐn)?shù)，下同）的Dy2O3時(shí)，一級(jí)回火可以明顯提高磁體的Hcj，但燒結(jié)溫度影響甚微；當(dāng)添加5%的Dy2O3時(shí)，隨燒結(jié)溫度的提高，磁體的Hcj顯著提高，但是一級(jí)回火使Hcj提高不明顯。這主要?dú)w因于：一是Dy2O3發(fā)生置換反應(yīng)生成Nd2O3顆粒影響燒結(jié)和回火制度，二是燒結(jié)溫度影響Dy原子擴(kuò)散。

    Abstract:

    The effects of first annealing and sintering temperature on the microstructures and magnetic properties of Dy2O3 doped Nd-Fe-B magnets were investigated. Results show that the effect of first annealing and sintering temperature on magnetic properties is remarkable, especially on the coercive force Hcj, which is closely related to the content of Dy2O3. When the added content of Dy2O3 is 2%, the first annealing can improve Hcj obviously, whereas the effect of sintering temperature is very unconspicuous. When the added content of Dy2O3 is 5%, Hcj is improved evidently with the increase of sintering temperature; however, the first annealing increases Hcj lightly. This is mainly attributed to the following reasons: on one hand, Dy2O3 is reduced to form Nd2O3 particles affecting sintering and annealing system; on the other hand, sintering temperature impacts the diffusion of Dy atom.

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崔熙貴,嚴(yán) 密,馬天宇,羅 偉,涂少軍.一級(jí)回火和燒結(jié)溫度對(duì)摻Dy2O3的Nd-Fe-B磁性能影響[J].稀有金屬材料與工程,2009,38(10):1839~1842.[Cui Xigui, Yan Mi, Ma Tianyu, Luo Wei, Tu Shaojun. Zhejiang University, Hangzhou 310027, China[J]. Rare Metal Materials and Engineering,2009,38(10):1839~1842.]
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  • 收稿日期:2008-10-30
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