Microstructure and Precipitates in Mg-Zn-Y Alloys


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The present work studied the precipitate microstructures in as-cast Mg-Zn-Y-Zr alloys. The experimental result showed that there is significant number of small precipitates within the grains besides the icosahedral quasicrystals along the grain boundaries. Among these precipitates, a new phase has been identified. The new phase displays square morphologies with the size in the range of 200 nm to 2 μm. According to the energy dispersive spectrometer (EDS), this phase could be a metallic Y-riched compound. The diffraction patterns can be indexed with an f.c.c. structure with the lattice parameter a = 0.52±0.1 nm. The structure does not agree with any precipitate structures that have been reported from the previous studies of Mg-Zn-Y alloys.



Materials Science Forum (Volumes 546-549)

Edited by:

Yafang Han et al.




M. Zhang et al., "Microstructure and Precipitates in Mg-Zn-Y Alloys", Materials Science Forum, Vols. 546-549, pp. 203-206, 2007

Online since:

May 2007




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