Abstract
A mechanism of isotropic improvement of magnetic properties of soft magnetic Fe–Si alloys with a bcc crystal lattice upon thermomagnetic treatment in an ac magnetic field is proposed. The essence of the mechanism is the applied alternating-sign magnetic field, which reorients axes of neighboring Si atoms pairs (“directed atomic ordering”) in nanoclusters with the FeSi (В2 type) superstructure and transfers the silicon atoms from the stable equilibrium position at centers of cubic cells into nonequilibrium position. In this case, bonding forces between atoms weaken, and the possibility of their displacement by moving magnetic-domain walls appears. As a result, nanoclusters are destroyed, and the redistribution of weakly coupled silicon atoms over the volume and isotropic improvement of magnetic properties of Fe—Si alloys occur. The dependence of the effect of thermomagnetic treatment of the Fe–Si alloys on the strength of applied dc magnetic field is explained (the effect of thermomagnetic treatment in low and high magnetic fields is anisotropic and isotropic, respectively).
Similar content being viewed by others
REFERENCES
B. V. Molotilov, “Problems of development and production of precision and special electrical steels,” Stal’, No. 2, 59–62 (2017).
A. A. Redikul’tsev and M. B. Tsyrlin, “Electrotechnical steel production: yesterday, today, tomorrow,” Chernaya Metallurgiya, No. 1, 44–63 (2013).
V. V. Shulika, I. E. Startseva, and Ya. S. Shur, “Thermomagnetic treatment of transformer steel in an alternating magnetic field,” Fiz. Met. Metalloved. 40, 296–303 (1975).
V. A. Zaikova, I. E. Startseva, and B. N. Filippov, Domain Structure and Magnetic Properties of Electrotechnical Steels (Nauka, Moscow, 1992) [in Russian].
S. Chikazumi, Physics of Ferromagnetism: Magnetic Characteristics and Engineering Application (Syokabo, Tokio, 1984; Mir, Moscow, 1987).
Yu. N. Dragoshanskii, N. K. Esina, and V. A. Zaikova, “The effect of perfection of crystallographic texture (110)[001] on the magnitude of electromagnetic losses in transformer steel,” Fiz. Met. Metalloved. 45, 723–728 (1978).
Yu. N. Dragoshanskii and V. I. Pudov, RF Patent No. 174673, Byull. Izobret., No. 30 (2017).
V. V. Gubernatorov, T. S. Sycheva, and Yu. N. Dragoshanskii, “Effect of thermomagnetic and thermomechanical treatments on the properties of ferromagnetic alloys,” Phys. Met. Metallogr. 98, 26–31 (2004).
A. M. Glezer and B. V. Molotilov A.M., Ordering and Deformation of Iron Alloys (Metallurgiya, Moscow, 1984).
A. R. Kuznetsov, Yu. N. Gornostyrev, N. V. Ershov, V. A. Lukshina, Yu. P. Chernenkov, and V. I. Fedorov, “Atomic displacements and short-range order in the FeSi soft magnetic alloy: Experiment and ab initio calculations,” Phys. Solid State 49, 2290–2297 (2007).
A. I. Zusman and M. A. Artsishevskii, Thermomagnetic Treatment of Iron–Nickel Alloys (Metallurgiya, Moscow, 1984) [in Russian].
I. N. Karnaukhov, A. E. Pogorelov, and M. S. Chernolevskii, “Directional mass transfer under the action of an external pulse,” Metallofiz. Noveish. Tekhnol. 34, 159–174 (2012).
L. A. Chebotkevich, A. A. Urusovskaya, and V. V. Veter, “The motion of dislocations under the action of a magnetic field,” Kristallografiya 10, 688–691 (1965).
V. V. Gubernatorov, T. S. Sycheva, Yu. N. Dragoshanskii, V. V. Ovchinnikov, and V. A. Ivchenko, “Influence of accelerated-ion bombardment on the effects of thermomagnetic treatment of ferromagnets,” Dokl. Akad. Nauk 410, 194–196 (2006).
ACKNOWLEDGMENTS
This work was performed in terms of state assignment of the Ministry of Science and Higher Education of the Russian Federation (theme Magnit, no. АААА-А18-118020290129-5) and in part was supported by the Ural Branch, Russian Academy of Sciences (project no. 18-10-2-5).
Author information
Authors and Affiliations
Corresponding author
Additional information
Translated by N. Kolchugina
Rights and permissions
About this article
Cite this article
Gubernatorov, V.V., Dragoshanskii, Y.N. & Sycheva, T.S. Atomic Ordering of Soft Magnetic Fe–Si Alloys and Effect of Thermomagnetic Treatment. Phys. Metals Metallogr. 120, 723–728 (2019). https://doi.org/10.1134/S0031918X19080052
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S0031918X19080052