Compositional dependence of thermal and elastic pr

Authors: Jihye An Hyunjune Yim ChoiYim Haein

Publish Date: 2010/06/06

Volume: 17, Issue: 3, Pages: 318-322

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Abstract

Starting from the quaternary Cu47Ti34Zr11Ni8 alloy the compositional dependence of thermal and elastic properties of CuTiZrNi alloys was systematically investigated Quaternary CuTiZrNi alloys can be cast directly from the melt into copper molds to form fully amorphous strips or rods with the thickness of 3–6 mm The evidence of the amorphous nature of the cast rods was provided by Xray spectra The measured glass transition temperature T g and crystallization temperature T x were obtained for the alloys using differential scanning calorimetry DSC at the heating rate of 20 K/s In the results the differences between the glass temperature and the crystallization temperature ΔT x=T x−T g are measured with values ranging up to 33–55 K The reduced glass transition temperature T rg which is the ratio of the glass temperature to the liquidus temperature T l is often used as an indication of the glassforming ability of metallic alloys For the present CuTiZrNi alloys this ratio is typically in the range of 05838–05959 characteristic of metallic alloys with good glassforming ability The elastic constants for several selected alloys were measured using ultrasonic methods The values of the elastic shear modulus bulk modulus and Poisson’s ratio were also given

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