Crystallization of Amorphous Cu_49.7Ti_31.8Zr_11.3Ni_7.2 Alloy

Abstract:

Bulk metallic glasses are attractive materials for structural and functional applications when compared to crystalline materials. The Cu-based glasses exhibit particular interest due primarily to their relatively low cost and high fracture resistance. In this work the Cu_49.7Ti_31.8Zr_11.3Ni_7.2 alloy was prepared from the mixture of pure metals by arc melting and following the ingot was re-melted by centrifugal casting in wedge-section copper mould. The structure of wedge bulk sample was evaluated by a combination of X-Ray Diffraction (XRD) and Differential Scanning Calorimetry (DSC). The results show that the amorphous state is formed in the thinner region and it is maintained up to thickness of 3.5 mm in the wedge bulk-sample. The crystallization temperature was observed above 400 °C coinciding with the studies of thermal crystallization by XRD and DSC. Dynamical heating of the amorphous phase from room temperature up to 750°C showed the formation of CuTi, Cu₁₀Zr₇ e Cu₂TiZr crystalline phases.

• Periodical: Materials Science Forum (Volume 869)
• Pages: 464-469
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.869.464
• Online since: August 2016
• Authors: Carlos Triveño Rios*, R. Contieri
• Keywords: Amorphous Alloy, Crystallization, Cu_49.7Ti_31.8Zr_11.3Ni_7.2 Alloy

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