Synthesis and characterization of amorphous Zr-based alloys with Ta and W additions |
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Authors: | A Pasko P Ochin S Nowak Y Champion |
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Affiliation: | aInstitut de Chimie et des Matériaux Paris Est (UMR 7182 CNRS), 2-8 rue Henri Dunant, 94320 Thiais, France |
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Abstract: | A reference Zr57Cu20Al10Ni8Ti5 bulk metallic glass as well as a number of alloys obtained by addition of refractory elements Ta or W (combined with Sn) to the main Zr–Cu–Al–Ni system were elaborated by mould casting, twin roll casting and planar flow casting. The chemical compositions were chosen according to empirical rules, and as combinations of the binary eutectics for strongly interacting elements, taking into account the corresponding enthalpies of mixing. Optical microscopy, X-ray diffractometry, differential thermal analysis, differential scanning calorimetry, scanning electron microscopy and tensile mechanical testing were used to characterize the fully and partially obtained amorphous materials. Correlation of glass forming ability, thermodynamic parameters, crystallization behaviour and mechanical properties with chemical composition and production technology is discussed. |
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Keywords: | Amorphous materials Metallic glasses Rapid solidification Mechanical properties Thermodynamic properties |
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