Results of formation of a ferromagnetic τ-phase and an antiferromagnetic ε-phase in alloys of type Mn54Al43C3 obtained by induction and arc melting and by rapid hardening of the melt are presented. The magnetic hysteresis properties of powders produced by high-power mechanical milling of the synthesized alloys are studied. The optimum temperature conditions for transformation of the ε-phase into a ferromagnetic τ-phase are determined for the alloys and for their ultrafine powders. The resulting powders of Mn54Al43C3 have an ultimate specific magnetization σ m = 81 (G · cm3)/g and a coercive force H c = 3 kOe in a magnetic field of 12 kOe.
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Notes
The authors are grateful to S. V. Andreev and A. N. Urzhumtsev for the help with synthesizing the compounds and experimental studies.
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Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 10, pp. 19 – 22, October, 2016.
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Volkov, K.D., Tarasov, E.N. & Zinin, A.V. Effect of the Crystallization Conditions of Alloy Mn54Al43C3 on the Magnetic Properties of Mechanically Milled Powder. Met Sci Heat Treat 58, 599–602 (2017). https://doi.org/10.1007/s11041-017-0062-8
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DOI: https://doi.org/10.1007/s11041-017-0062-8