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Glass-Forming Ability and Soft Magnetic Properties of (Co75Ti25)100−xFex (x; 0–20 at.%) Systems Fabricated by SPS of Mechanically Alloyed Nanopowders

Nanotechnology and Applications Program, Energy and Building Research Center, Kuwait Institute for Scientific Research, Safat 13109, Kuwait
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Nanomaterials 2020, 10(5), 849; https://doi.org/10.3390/nano10050849
Received: 4 April 2020 / Revised: 17 April 2020 / Accepted: 24 April 2020 / Published: 28 April 2020
(This article belongs to the Section Synthesis, Interfaces and Nanostructures)
Due to their outstanding mechanical properties and soft magnetic characteristics, cobalt-based metallic glassy alloys have stimulated much interesting research. These metastable ferromagnetic materials possess very small magnetocrystalline anisotropy, and almost zero magnetostriction. They reveal low coercivity, extremely low core loss, moderate saturation polarization, and very high magnetism. Despite these attractive physical behaviors, Co-based metallic glasses are difficult to obtain by the melting/casting and conventional rapid solidification techniques due to their poor glass-forming ability. In the present study, we succeed in preparing (Co75Ti25)100−xFex (x; 0–20 at.%) metallic glassy powders, using a mechanical alloying approach. The end product of the as-prepared powders was consolidated into full dense cylinders with large-diameter and thickness (2 × 2 cm), using spark plasma sintering technique. The results have shown that the consolidation step did not lead to any undesired crystallizations or phase transformations, and the as-consolidated buttons maintained their unique short-range order structure. These bulk metallic glassy systems possessed high glass-transition and crystallization temperatures, suggesting their high thermal stability. However, they showed low values of the reduced glass-transition temperatures, indicating that this system is difficult to prepare by the conventional way of preparations. View Full-Text
Keywords: mechanical alloying; high-energy ball-milling; solid-state reaction; solid-solution; layered structure morphology; phase transformation; glass-transition; crystallizations; supercooled liquid region; thermodynamics mechanical alloying; high-energy ball-milling; solid-state reaction; solid-solution; layered structure morphology; phase transformation; glass-transition; crystallizations; supercooled liquid region; thermodynamics
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MDPI and ACS Style

El-Eskandarany, M.S.; Ali, N.; Saeed, M. Glass-Forming Ability and Soft Magnetic Properties of (Co75Ti25)100−xFex (x; 0–20 at.%) Systems Fabricated by SPS of Mechanically Alloyed Nanopowders. Nanomaterials 2020, 10, 849. https://doi.org/10.3390/nano10050849

AMA Style

El-Eskandarany MS, Ali N, Saeed M. Glass-Forming Ability and Soft Magnetic Properties of (Co75Ti25)100−xFex (x; 0–20 at.%) Systems Fabricated by SPS of Mechanically Alloyed Nanopowders. Nanomaterials. 2020; 10(5):849. https://doi.org/10.3390/nano10050849

Chicago/Turabian Style

El-Eskandarany, Mohamed S., Naser Ali, and Maryam Saeed. 2020. "Glass-Forming Ability and Soft Magnetic Properties of (Co75Ti25)100−xFex (x; 0–20 at.%) Systems Fabricated by SPS of Mechanically Alloyed Nanopowders" Nanomaterials 10, no. 5: 849. https://doi.org/10.3390/nano10050849

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