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Nd-Fe-B-Dy四元系熱力學(xué)數(shù)據(jù)庫(kù)的建立及其合金設(shè)計(jì)
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1.廈門大學(xué)材料學(xué)院;2.哈爾濱工業(yè)大學(xué)(深圳);3.白云鄂博稀土資源研究與綜合利用國(guó)家重點(diǎn)實(shí)驗(yàn)室

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Thermodynamic Databases of Nd-Fe-B-Dy quaternary Alloy Systems and Alloy Design
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Open Fund of State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization；National Natural Science Foundation of China（No.51771158）

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    摘要:

    本研究利用CALPHAD方法，采用合理的熱力學(xué)模型，熱力學(xué)優(yōu)化和計(jì)算了Nd-Dy、Dy-B二元系和Fe-B-Dy、Dy-Fe-Nd、B-Dy-Nd三元系的相圖，并利用文獻(xiàn)報(bào)道的其他子二元系和三元系的熱力學(xué)參數(shù)，充分考慮了熱力學(xué)模型的統(tǒng)一性和參數(shù)的兼容性，建立了Nd-Fe-B-Dy四元系合金的熱力學(xué)數(shù)據(jù)庫(kù)，并應(yīng)用該數(shù)據(jù)庫(kù)，預(yù)測(cè)了Nd-Fe-B-Dy四元合金Nd16-xDyxFe77B7 (x≤5 at.%)的縱截面相圖；同時(shí)還分析了一系列不同Dy含量的永磁合金在平衡凝固下各相相分?jǐn)?shù)隨溫度的變化情況。這些計(jì)算信息對(duì)摻鏑NdFeB永磁合金的組織設(shè)計(jì)以及制備工藝參數(shù)的選擇具有重要的指導(dǎo)意義。

    Abstract:

    The CALPHAD method was used to optimize and calculate the phase diagrams of Nd-Dy, Dy-B binary systems and Fe-B-Dy, Dy-Fe-Nd and B-Dy-Nd ternary systems. The thermodynamic databases of Nd-Fe-B-Dy quaternary alloys were established by the thermodynamic parameters of binary and ternary sub-systems reported in the literature and took into account the consistency of the thermodynamic models. The longitudinal cross-section phase diagrams of Nd-Fe-B-Dy quaternary alloy Nd16-xDyxFe77B7 (x≤5 at.%) were predicted by using these databases. At the same time, the variation of the fractions of each phase of the permanent magnet alloy with different Dy content under equilibrium solidification was analyzed. These results could be helpful for the microstructure design of the Dy-doped NdFeB permanent magnet alloy and the selection of the preparation process parameters.

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王翠萍,盧勇,鄧育靈,郭毅慧,黃藝雄,陳夢(mèng)華,栗周,劉興軍,劉國(guó)征. Nd-Fe-B-Dy四元系熱力學(xué)數(shù)據(jù)庫(kù)的建立及其合金設(shè)計(jì)[J].稀有金屬材料與工程,2020,49(9):3021~3029.[wangcuiping, luyong, dengyuling, guoyihui, huangyixiong, chenmenghua, lizhou, liuxingjun, liuguozheng. Thermodynamic Databases of Nd-Fe-B-Dy quaternary Alloy Systems and Alloy Design[J]. Rare Metal Materials and Engineering,2020,49(9):3021~3029.]
DOI：10.12442/j. issn.1002-185X.20190463

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  • 收稿日期:2019-05-29
  • 最后修改日期:2019-08-31
  • 錄用日期:2019-09-06
  • 在線發(fā)布日期: 2020-10-15
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