Heating Rate and Composition Dependence of Crystallization Temperature of Cu-Based Metallic Glasses

Abstract:

The variation of onset of crystallization temperature (T_x) and peak crystallization temperature (T_p) with heating rate (q) is studied. T_x and T_p vary in a power law behavior with heating rate (q) for Cu₆₀ Zr₂₀Ti₂₀ metallic glass and these parameters show a linear variation for Cu₆₀Zr₄₀ metallic glass. The power law variation is expressed as T_x (or T_p) = T₀ [q]^y; where, q is the normalized heating rate, T₀ is the T_x (or T_p) at a heating rate of 1⁰Cmin^-1. Further, the calculated values of T_x (or T_p) are found to be in good agreement with the experimental results. Hence, the power law relation is found to be an appropriate theoretical expression for the variation of crystallization temperature (T_x or T_p) with heating rate (q) for Cu₆₀ Zr₂₀Ti₂₀ metallic glass. In addition to heating rate, the composition of a metallic glass also affects its crystallization temperature. It is observed that the characteristics temperatures shift towards higher values with increase in number of components.

• Periodical: Advanced Materials Research (Volume 1141)
• Pages: 156-161
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1141.156
• Online since: August 2016
• Authors: Supriya Kasyap, Sonal Prajapati, Arun Pratap*
• Keywords: Metallic Glasses, Onset Crystallization Temperature (T_x), Peak Crystallization Temperature (T_p)

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