Indentation creep study on a Zr-based bulk metallic glass containing nano-quasicrystals

Lendvai, János and Fátay, D. and Gubicza, Jenő (2008) Indentation creep study on a Zr-based bulk metallic glass containing nano-quasicrystals. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCURE AND PROCESSING, 483-48. pp. 607-610. ISSN 0921-5093

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Abstract

The effect of crystallization on the creep behavior of a Zr-based bulk metallic glass (BMG) with the composition of Zr(44)Ti(11)Cu(10)Ni(10)B(25) (at.%) was studied by indentation technique. The crystallization process was studied by isothermal annealing in a differential scanning calorimeter at three different temperatures above the glass transition temperature (677, 682 and 687 K). Two exothermic peaks are detected, the first one corresponds to the formation of a quasicrystalline phase. Indentation creep tests were carried out isothermally at the same three temperatures for studying the correlation between the amount of quasicrystalline phase and the creep behavior. A simple relationship between the viscosity and the crystalline phase fraction was found and the activation energy was found to decrease with the progress of crystallization.

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