Analysis of the fragility of the Zr77Ni23 metallic glass based on low-temperature heat capacity measurements

Scientific paper - Original scientific paper

• Author: Amra Salčinović Fetić
• Author: Georgy Remenyi
• Author: Damir Starešinić; MBZ: 229945
• Author: Ahmed Kuršumović
• Author: Emil Babić; MBZ: 1146
• Author: Suada Sulejmanović
• Author: Katica Biljaković; MBZ: 76732
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

We present an experimental investigation of the fragility and heat capacity of metallic glass Zr77Ni23. The ribbon sample was produced by melt-spinning technique. Glass transition temperature Tg obtained by differential scanning calorimetry with various heating rates was used to estimate fragility parameter m. Heat capacity measurements were performed in a wide temperature interval, ranging from 1.8 K up to room temperature, for as-cast and relaxed samples in different magnetic field strengths. Our results do not show any excess of ibrational density of states over the Debye contribution corresponding to the boson peak. Relaxation of the sample causes a slight decrease of Debye contribution consistent with the measured increase of Young modulus. The fact that no boson peak is observed in heat capacity, together with the obtained intermediate fragility of m=53, positions Zr77Ni23 well outside established correlations between fragility, boson peak strength, and glass forming ability.

• Keywords (english): Metallic glass; Fragility; Heat capacity; Boson peak; Glass forming ability
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Physical Review B
• Numbering: vol. 96, no. 6, 064201
• p-ISSN: 2469-9950
• e-ISSN: 2469-9969
• DOI: https://doi.org/10.1103/PhysRevB.96.064201
• URN:NBN: urn:nbn:hr:217:791085
• Publication: 2017
• Document URL: https://journals.aps.org/prb/abstract/10.1103/PhysRevB.96.064201
• Type of resource: Text
• Access conditions: Open access
• Public note: © 2017 American Physical Society. Received 13 February 2017. Revised 4 June 2017. Published 7 August 2017.
• Created on: 2020-02-29 18:22:48