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鏑的分布對(duì)燒結(jié)和時(shí)效含鏑釹鐵硼永磁合金性能的影響
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山東大學(xué)材料液固結(jié)構(gòu)演變與加工教育部重點(diǎn)實(shí)驗(yàn)室,山東大學(xué)材料液固結(jié)構(gòu)演變與加工教育部重點(diǎn)實(shí)驗(yàn)室,煙臺(tái)首鋼磁性材料有限公司,煙臺(tái)首鋼磁性材料有限公司,煙臺(tái)首鋼磁性材料有限公司,山東大學(xué)材料液固結(jié)構(gòu)演變與加工教育部重點(diǎn)實(shí)驗(yàn)室

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國(guó)家高技術(shù)研究發(fā)展計(jì)劃 (SS2012AA030801)；國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃 (2010CB631203)；大飛機(jī)關(guān)鍵構(gòu)件成型共性技術(shù)研究 (2012ZX04010-081)


Distribution of Dysprosium and Influence on the Property of the Sintered and Aged Dy-doped NdFeB Permanent Magnets
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    摘要:

    本文研究了燒結(jié)和時(shí)效含鏑釹鐵硼磁體。通過(guò)對(duì)不同狀態(tài)磁體的磁滯曲線,場(chǎng)發(fā)射電鏡以及能譜分析對(duì)磁體的磁性能,微結(jié)構(gòu)以及成份進(jìn)行了分析。結(jié)果表明,除了主晶相外,鏑元素主要分布在富釹相,釹鏑氧化物和位于晶界的富鏑顆粒中。優(yōu)化時(shí)效過(guò)程促進(jìn)了鏑在磁體中合理的擴(kuò)散以及分布,鏑在燒結(jié)磁體,高溫時(shí)效磁體以及優(yōu)化時(shí)效磁體中富釹相,釹鏑氧化物以及含鏑顆粒中的含量減少,證明了優(yōu)化時(shí)效后,鏑元素在磁體中的合理分布,導(dǎo)致了含鏑釹鐵硼永磁合金矯頑力的提高。

    Abstract:

    Sintered and aged Dy-doped NdFeB magnets was studied in this work. The magnetic properties, microstructures and compositions was investigated by hysteresis loop instrument, thermal field emission scanning electron microscopy and energy disperse spectroscopy, respectively. The result of analysis indicated that Dy element mainly distributed in the Nd-rich phase, Nd-Dy oxides and Dy-rich particles which is located at the grain boundary of the sintered magnets, in addition to the main crystal phase Nd2Fe14B. The optimized aging process is beneficial to promote a reasonable diffusion and distribution for Dy element. The Dy contents of Nd-riched phases, Nd-Dy oxide, and Dy-riched particle decreased successively in the sintered, the high temperature aged and the optimal two-stage aged Dy-doped NdFeB permanent magnets. The measurements demonstrated that the enhancement of the coercivity of the aged Dy-doped NdFeB Magnet was caused mainly by the Dy element reasonable distribution.

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王曉麗,趙利娜,丁開(kāi)鴻,崔勝利,孫永聰,李木森.鏑的分布對(duì)燒結(jié)和時(shí)效含鏑釹鐵硼永磁合金性能的影響[J].稀有金屬材料與工程,2016,45(2):309~314.[wangxiaoli, Zhao lina, Ding kaihong, Cui Shengli, Sun Yongsong, Li Mu-Sen. Distribution of Dysprosium and Influence on the Property of the Sintered and Aged Dy-doped NdFeB Permanent Magnets[J]. Rare Metal Materials and Engineering,2016,45(2):309~314.]
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  • 收稿日期:2015-01-30
  • 最后修改日期:2015-03-03
  • 錄用日期:2015-05-13
  • 在線發(fā)布日期: 2016-07-19
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