Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/25680
Title: Phase evolution and dendrite growth in laser cladding of aluminium on zirconium
Authors: Yue, TM 
Xie, H
Lin, X
Yang, HO
Keywords: Aluminium
Dendrite growth
Intermetallics
Laser cladding
Phase evolution
Zirconium
Issue Date: 2011
Publisher: Elsevier
Source: Journal of alloys and compounds, 2011, v. 509, no. 8, p. 3705-3710 How to cite?
Journal: Journal of alloys and compounds 
Abstract: Aluminium was laser clad on a pure zirconium substrate using the blown powder method. The microstructure across the laser-clad coating was studied. Starting from the bottom to the top surface of the coating, a series of phase evolutions had occurred: (Zr) → (Zr) + AlZr 2 + AlZr 3 → Al 4Zr 5 + Al 3Zr 2 → Al 3Zr 2 + AlZr 2 → Al 2Zr → Al 2Zr + Al 3Zr. This resulted in an epitaxial columnar crystal growth at the re-melt substrate boundary, a band of backward growth Al 3Zr 2 dendrites towards the lower half of the coating, and a two-phase eutectic dendritic growth of Al 2Zr + Al 3Zr towards the top of the coating. The evolution of the various phases and microstructures is discussed in conjunction with the Al-Zr phase diagram, the criteria for planar interface instability, and the theory of eutectic growth under rapid solidification conditions (the TMK model).
URI: http://hdl.handle.net/10397/25680
ISSN: 0925-8388
DOI: 10.1016/j.jallcom.2010.12.173
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