TY - JOUR

T1 - Nanocrystallization process in Mn-modified finemet-type alloy

AU - Shishkin, D.

AU - Stashkova, L.

AU - Korkh, Yu.

N1 - The research was carried out within the state assignment of Ministry of Science and Higher Education of the Russian Federation (theme « Magnet » No. 122021000034–9).

PY - 2023/8/1

Y1 - 2023/8/1

N2 - In this paper, we studied the effect of heat treatment on the structural features and crystallization kinetics process of rapidly quenched Finemet-type ribbon for composition with 10% of iron substitution by manganese in initial state. After ribbon annealing at 580 °C for 30 min, and also at 600 °C for 10 and 30 min, the Fe(Si), Fe3B and Fe23B6 phases were identified. The crystallization activation energy, Ea, was found 585 kJ/mol (6.06 eV/at), and the Avrami exponent, n, was determined to be 3.13. In contrast to classical Finemet, where the crystallization process is a typical diffusion-controlled three-dimensional growth at a constant nucleation rate, in the modified alloy with 10% manganese, the growth of small particles predominates with an increase in the nucleation rate. During heat treatment the surface roughness and average peak height were increased from 3.0 to 24.2 nm and from 4.5 to 75.2 nm, respectively.

AB - In this paper, we studied the effect of heat treatment on the structural features and crystallization kinetics process of rapidly quenched Finemet-type ribbon for composition with 10% of iron substitution by manganese in initial state. After ribbon annealing at 580 °C for 30 min, and also at 600 °C for 10 and 30 min, the Fe(Si), Fe3B and Fe23B6 phases were identified. The crystallization activation energy, Ea, was found 585 kJ/mol (6.06 eV/at), and the Avrami exponent, n, was determined to be 3.13. In contrast to classical Finemet, where the crystallization process is a typical diffusion-controlled three-dimensional growth at a constant nucleation rate, in the modified alloy with 10% manganese, the growth of small particles predominates with an increase in the nucleation rate. During heat treatment the surface roughness and average peak height were increased from 3.0 to 24.2 nm and from 4.5 to 75.2 nm, respectively.

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U2 - 10.1016/j.solidstatesciences.2023.107240

DO - 10.1016/j.solidstatesciences.2023.107240

M3 - Article

VL - 142

JO - Solid State Sciences

JF - Solid State Sciences

SN - 1293-2558

M1 - 107240

ER -