CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Role of Ag microalloying on glass forming ability and crystallization kinetics of ZrCoAgAlNi amorphous alloy |
A Surendar1,†, K Geetha2, C Rajan3, and M Alaazim4,‡ |
1 Department of Pharmacology, Saveetha Dental College and Hospital, Saveetha Institute of Medical and Technical Sciences, Chennai, India\vglue2pt; 2 CSE, Excel Engineering College, Pallakapalayam, Komarapalayam, 637303, India; 3 IT, K S Rangasamy College of Technology Tiruchengode, Namakkal, Tamil Nadu 637215, India; 4 Faculty of Engineering, Universitas Muhammadiyah Surakarta (UMS), Indonesia |
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Abstract Bulk metallic glasses (BMGs) with new chemical compositions (ZrCoAgAlNi) were fabricated and the effects of Ag minor addition on the glass forming ability (GFA) and crystallization kinetics were studied. The x-ray diffraction (XRD) test was applied to identify the amorphousness of BMGs or possible crystalline phases. Using differential scanning calorimeter (DSC), the thermal stability and crystallization kinetics under a non-isothermal condition at the different heating rates were studied. Considering the heating rate dependency of glass transition and crystallization kinetics, the activation energy was evaluated and measured for the mentioned processes. It was revealed that the rise in Ag content led to the decrease in activation energy for glass transition, while the activation energy for crystallization increased. The thermal stability and GFA were also studied and it was found that the Ag addition strongly affected the inherent features of BMGs. With the increase in Ag content, the atomic mobility and structural rearrangement changed in the material and consequently, the GFA and thermal stability were significantly improved.
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Received: 26 June 2020
Revised: 31 August 2020
Accepted manuscript online: 09 September 2020
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PACS:
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72.10.Di
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(Scattering by phonons, magnons, and other nonlocalized excitations)
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Corresponding Authors:
†Corresponding author. E-mail: surendararavindhan@ieee.org ‡Corresponding author. E-mail: mohammed.alaazim@gmail.com
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Cite this article:
A Surendar, K Geetha, C Rajan, and M Alaazim Role of Ag microalloying on glass forming ability and crystallization kinetics of ZrCoAgAlNi amorphous alloy 2021 Chin. Phys. B 30 017201
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