Influence of thermal treatments on the elastic parameters in iron rich metallic glasses |
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Authors: | J. Guti rrez , J. M. Barandiar n ,Z. Kaczkowski |
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Affiliation: | a Dpto. Electricidad y Electrónica—Unidad Asociada CSIC, Facultad de Ciencias, Universidad del País Vasco/EHU, Apdo. 644, 48080, Bilbao, Spain b Institute of Physics, Polish Academy of Sciences Al. Lotnikow 32/46, PL-02-668, Warsaw, Poland |
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Abstract: | The change of magnetoelastic properties after thermal treatments has been investigated for two groups of metallic glasses. (Fe79Co21)75+xSi15−1.4xB10+0.4x (x (at.%)=0, 2, 4, 6, 8, 10) has been studied both in the as-prepared state and after thermal annealing in an applied magnetic field, to achieve a particular domain structure, at temperatures well below the crystallization temperatures. Changes in the ΔE effect, magnetomechanical coupling (k) and internal friction coefficient (Q−1) are reported, reaching values of about 60% of the saturation value ES. Fe64Ni10Nb3Cu1Si13B9 alloys annealed in vacuum for 1 h in the temperature range 350–550 °C showed maximum values of the ΔE effect and k of 61% and 0.85, respectively, accompanied by a minimum value of Q of around 2 for the sample annealed at 460 °C. These variations are related to the progress of nanocrystalization. The properties achieved are among the best reported for magnetomechanical applications. |
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Keywords: | Author Keywords: Metallic glasses Young’s modulus Magnemechanical coupling Internal friction |
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