Evolution of microstructure and non-equilibrium phases in electron beam treated Zr55Cu30Al10Ni5 bulk amorphous alloy

Electron beam (EB) is becoming very popular for the modification of the surfaces as it involves localized melting and fast cooling which helps in achieving the non-equilibrium phases as well as fine microstructure. Surface modification of Zr-based amorphous alloy Zr55Cu30Al10Ni5 has been carried out...

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Bibliographic Details
Published in:Journal of alloys and compounds 2008-07, Vol.460 (1-2), p.258-262
Main Authors: TARIQ, N. H, IQBAL, M, SHAIKH, M. A, AKHTER, J. I, AHMAD, M, ALI, G, HU, Z. Q
Format: Article
Language:English
Subjects:
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Other heat and thermomechanical treatments
Physics
Treatment of materials and its effects on microstructure and properties
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Summary:Electron beam (EB) is becoming very popular for the modification of the surfaces as it involves localized melting and fast cooling which helps in achieving the non-equilibrium phases as well as fine microstructure. Surface modification of Zr-based amorphous alloy Zr55Cu30Al10Ni5 has been carried out by EB melting. Differential scanning calorimetry (DSC) was employed to determine the supercooled liquid region and activation energy of crystallization. The as-cast and modified surfaces of amorphous alloy at different beam conditions were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) techniques. Various phases like NiZr2, CuZr2 and Cu10Zr7 were identified which resulted in the enhancement of hardness of the modified alloy surface.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2007.05.109