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The metastable and stable liquid state thermophysical properties and rapid solidification mechanism of quaternary Fe75.6Nd10Y9B5.4 alloy with maximum 221 K (0.14 TL) undercooling were investigated using electrostatic levitation technique. The measured results indicated that the density, thermal expansion coefficient and the ratio of specific heat to emissivity of the liquid alloy followed linear functional relationship with temperature in the range of 1402-1618 K. Molecular dynamics (MD) simulations revealed that the diffusion coefficients of Nd and Y elements decreased exponentially with temperature, while the former one presented larger diffusivity at the same temperature. When the liquid undercooling rose from 80 to 158 K, the growth velocity of primary (Nd,Y)2Fe17 phase dendrites increased from 3.8 to 5.7 mm·s-1, along with significant grain refinement effect. Meanwhile, the increased undercooling also promoted peritectic transformation, resulting in the volume fraction of peritectic τ1-(Nd,Y)2Fe14B phase up to 75%. Once the undercooling reached 180 K, rather than the primary (Nd,Y)2Fe17 phase, the former peritectic τ1 phase became the leading phase, which nucleated and grew directly from the undercooled liquid alloy, and its growth velocity increased with undercooling from 2.6 to 11.0 mm·s-1. The formation enthalpy calculation results showed that the solid solution of the Y element can enhance the thermodynamic stability of the (Nd,Y)2Fe17 phase and the τ1 phase, which explained the reason why the contents of Y element in both phases were significantly higher than those of Nd element. Nevertheless, the content of Nd element in the τ1 phase slightly increased owing to its stronger diffusion ability than that of Y if undercooling was higher than 180 K.
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Keywords:
- Fe-Nd-Y-B alloy /
- electrostatic levitation /
- metastable liquid state thermophysical properties /
- rapid solidification microstructure
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[1] Guo S, Liao S, Fan X, Ding G, Zheng B, Chen R, Yan A. 2022 Materials 15 5964
[2] Wan Z, Hu L, Jin Y, Wei B. 2025 Acta Phys. Sin. 74 38101 (in Chinese) [万梓煊, 胡亮, 金英捷, 魏炳波. 2025 物理学报, 74 038102.]
[3] Paradis P, Ishikawa T, Koike N, Watanabe Y. 2008 J. Jpn. Soc. Microgravity Appl. 25 407
[4] Paradis P, Ishikawa T, Koike N. 2009 Microgravity Sci. Tec. 21 113
[5] Wille G, Millot F. 2002 Int. J. Thermophys. 23 1197
[6] Zheng Y P, Kang W G, Hu L, Zhai W, Wei B. 2023 J. Alloy. Compd. 968 172141
[7] Li X, Liu T, Guo Z, Zhu M, Li W. 2008 Acta Phys. Sin. 57 3823 (in Chinese) [李岫梅, 刘 涛, 郭朝晖, 朱明刚, 李 卫. 2008 物理学报, 57 3823.]
[8] Zhang C, Luo Y, Yu D, Quan N, Wu G, Dou Y, Hu Z, Wang Z. 2020 Rare Metals 39 55
[9] Fan X, Ding G. 2018 Acta Mater. 154 343
[10] Hu L, Wang H, Li L, Wei B. 2013 Sci. China Technol. Sci. 56 53
[11] Jin Y, Geng D, Lin M, Hu L, Wei B. 2024 Acta Phys. Sin. 73 86401 (in Chinese) [金英捷, 耿德路, 林茂杰, 胡亮, 魏炳波. 2024 物理学报 73 086401.]
[12] Chathoth S M, Damaschke B, Samwer K, Schneider S. 2008 Appl. Phys. Lett. 93 71902
[13] Hu L, Li L H, Yang S J, Wei B. 2015 Chem. Phys. Lett. 621 91-95
[14] Binder K, Horbach J, Kob W, Paul W, Varnik F. 2004 J. Phys. Condens. Matter 16 S429
[15] Biswas A, Bhattacharyya D. 2025 Journal of Applied Physics 137 85301
[16] Syarif J, Badawy K, Hussien H A. 2021 Nucl. Mater. Energy 29 101073
[17] Tadmor E B, Elliott R S. 2011 Jom 63 17
[18] Thol M, Rutkai G, Köster A, Lustig R, Span R, Vrabec J. 2016 J. Phys. Chem. Ref. Data 45 023101
[19] Einstein A. 1905 Ann. phys. 322 549
[20] Ju Y, Zhang Q, Gong Z, Ji G. 2013 Chinese Physics B 22 83101
[21] Fisher J C. 1951 J. Appl. Phys. 22 74
[22] Kresse G, Hafner J. 1993 Phys. Rev. B 48 13115
[23] Kresse, Furthmüller. 1996 Phys. Rev. B 54 11169
[24] Wang Y, Chen Z, Jiang H. 2016 J. Chem. Phys. 144 144106
[25] Perdew J P, Burke K. 1996 Phys. Rev. Lett. 77 3865
[26] Zou M, Dong H, Lu Y, Wang T, Su D, Wang Y, Pan X, Zou Y. 2025 Compt. Mater. Sci. 249 113626
[27] Paul A, Laurila T, Vuorinen V, Divinski S V. 2014 Thermodynamics, Diffusion and the Kirkendall Effect in Solids (Cham: Springer International Publishing) pp:167-238
[28] Turnbull D. 1950 J.Appl.Phys. 21 1022
[29] Wu Y H, Chang J, Wang W L, Hu L, Yang S J, Wei B. 2017 Acta Mater. 129 366
[30] Zhai W, Wei B. 2013 Mater.Lett. 108 145
[31] Dinsdale A T. 1991 Calphad 15 317
[32] Gale W F, Totemeier T C. 2004 Smithells Metals Reference Book. (London: Butterworth) pp 998-1005
[33] Liao L X, Altounian Z, Ryan D H. 1993 Phys. Rev. B 47 11230
[34] Jaswal S S, Yelon W B, Hadjipanayis G C, Wang Y Z, Sellmyer D J. 1991 Phys. Rev. Lett. 67 644
[35] Hirosawa S, Matsuura Y, Yamamoto H, Fujimura S, Sagawa M, Yamauchi H. 1986 J. Appl. Phys. 59 873
[36] Koyama K, Fujii H. 2000 Phys. Rev. B 61 9475
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