Abstract
The properties of sintered magnets (Pr1 − x Dy x )-(Fe1 − y Co y )-B (x ≳ 0.6 at %, y ≳ 0.2 at %) as functions of the milling time and the sintering conditions are studied. Minima in the coercive force and the density as functions of the sintering temperature are detected. The dependence of the minimum depth on the milling time is detected. In the case of long-term sintering or additional sintering, the values of these parameters are restored. The minimum in the (Pr1 − x Dy x )-(Fe1 − y Co y )-B (x ≳ 0.6 at %, y ≳ 0.2 at %) materials is assumed to be related to the deceleration of diffusion processes in them as compared to the (Nd1 − x Dy x )-(Fe1 − y Co y )-B (x = 0.71 at %, y = 0.34 at %) system, in which this minimum is insignificant.
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E. N. Kablov, A. F. Petrakov, V. P. Piskorskii, R. A. Valeev, and N. V. Nazarova, “Effect of dysprosium and cobalt on the temperature dependence of the magnetization and phase composition of a material of the Nd-Dy-Fe-Co-B system,” Metalloved. Term. Obrab. Met., No. 4, 3–10 (2007).
Aviation Materials and Technologies, Ed. by E. N. Kablov (VIAM, Moscow, 2012).
E. N. Kablov, “Strategic directions in developing materials and their processing technologies up to 2030”, in Aviation Materials and Technologies: Jubilee Scientific and Technical Collection. Supplement to Journal Aviats. Matr. Tekhn. (VIAM, Moscow, 2012), pp. 7–17.
A. F. Petrakov, V. P. Piskorskii, G. S. Burkhanov, M. V. Repina, and S. I. Ivanov, “Peculiarities of sintering of Nd(Pr)-Dy-Fe-Co-B magnets with a high copper content,” Metalloved. Term. Obrab. Met., No. 7, 3–9 (2012).
N. I. Ganina, A. M. Zakharov, V. G. Olenicheva, and L. A. Petrova, Phase Diagrams of Metallic Systems (VINITI, Moscow, 1988).
C. N. Christodoulou, T. B. Massalski, and W. E. Wallace, “Liquidus projection surface and isothermal section at 1000°C of the Co-Pr-B (Co-rich) ternary phase diagram,” J. Phase Equilibria 14(1), 31–47 (1993).
Yi Chen, Jingkui Liang, Xiaolong Chen, and Quanlin Liu, “Phase equilibria in the ternary system Pr-Co-B,” J. Alloys and Comp. 289(1–2), 96–98 (1999).
H. Okamoto, “Fe-Nd (iron-neodymium),” J. Phase Equilibria 18(1), 106 (1997).
H. Okamoto, “Fe-Pr (iron-praseodymium),” J. Phase Equilibria 17(3), 269 (1996).
H. Okamoto, “Co-Pr (cobalt-praseodymium),” J. Phase Equilibria 13(6), 675 (1992).
H. Okamoto, “Dy-Fe (dysprosium-iron),” J. Phase Equilibria 17(1), 80 (1996).
V. V. Sergeev and T. I. Bulygina, Hard Magnetic Materials (Energiya, Moscow, 1980).
F. Aizenkolb, Powder Metallurgy (Metallurgizdat, Moscow, 1959).
R. N. Faria, B. E. Davies, D. N. Brown, and I. R. Harris, “Microstructural and magnetic studies of cast and annealed Nd and PrFeCoBZr alloys and HDDR materials,” J. Alloys Comp. 296, 223–228 (2000).
G. Schneider, E. Henig, F. Missel, and G. Petzow, “Microstructure of sintered Fe-Nd-B magnets,” Z. Metallkünde 81(5), 322–329 (1990).
Yu. B. Kuz’ma and N. F. Chaban, Binary and Ternary Boron-Containing Systems: A Handbook (Metallurgiya, Moscow, 1990).
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Original Russian Text © E.N. Kablov, R.A. Valeev, V.P. Piskorskii, A.V. Buzenkov, 2014, published in Metally, 2014, No. 3, pp. 69–75.
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Kablov, E.N., Valeev, R.A., Piskorskii, V.P. et al. Sintering of Pr-Dy-Fe-Co-B materials. Russ. Metall. 2014, 406–411 (2014). https://doi.org/10.1134/S0036029514050048
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DOI: https://doi.org/10.1134/S0036029514050048