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    • Crystallization and kinetics studies of Ti$_{20}$Zr$_{20}$Cu$_{60−x}$Ni$_x$ ($x = 10$, 20, 30 and 40) metallic glasses

      P RAMA RAO ANIL K BHATNAGAR BHASKAR MAJUMDAR

      Volume 43 Published: 3 January 2020 Article ID 0036

    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/043/0036

    • Keywords

       

      Amorphous alloys; metallic glasses; crystallization; activation energy.

    • Abstract

       

      Synthesis and characterization of Ti$_{20}$Zr$_{20}Cu$_{60−x}$ Ni$_x$ ($x = 10$, 20, 30 and 40) metallic glasses are reported in this paper. Glassy ribbons are produced by rapid quenching using the standard copper wheel roller technique in argon atmosphere. Their structural characterization is carried out by X-ray diffraction (XRD) and thermal behaviour (crystallization) study by differential scanning calorimetry (DSC). Results of XRD on both sides of each ribbon sample confirmed that each sample was indeed amorphous/glassy as only a very broad peak in XRD pattern was observed. Metallic glass Ti$_{20}$Zr$_{20}$Cu$_{50}$Ni$_{10}$ shows three crystallization peaks in non-isothermal DSC scans while other three samples show only a single crystallization peak. The activation energy of crystallization for each sample has been calculated using three available models, namely, those of Kissinger, Augis–Bennett and Ozawa. All the three models gave nearly similar activation energies for a given sample within 10%.

    • Author Affiliations

       

      P RAMA RAO1 2 ANIL K BHATNAGAR3 BHASKAR MAJUMDAR4

      1. School of Engineering Sciences and Technology, University of Hyderabad, Hyderabad 500046, India
      2. CSIR-Central Glass and Ceramic Research Institute, Kolkata 700032, India
      3. School of Physics, University of Hyderabad, Hyderabad 50046, India
      4. Defence Metallurgical Research Laboratory (DMRL), Kanchanbagh, Hyderabad 500 058, India

    • Dates

       
      Published
      3 January 2020
      Manuscript received
      26 September 2018
      Accepted
      7 August 2019
      Final version published online
      19 December 2019

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