Effect of Nd Addition on Microstructure of Mg-Zn-Nd Master Alloys

Zhen Wei Zhao; Xin Ying Teng; Guo Rong Zhou

doi:10.4028/www.scientific.net/AMR.500.646

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 500Effect of Nd Addition on Microstructure of...

Effect of Nd Addition on Microstructure of Mg-Zn-Nd Master Alloys

Abstract:

Mg-Zn-Nd master alloys containing spherical quasicrystal phase were prepared under conventional casting conditions. The microstructures and phases of Mg-Zn-Nd ternary alloy have been investigated by means of scanning electron microscopy (SEM), X-ray diffraction (XRD) and energy dispersive spectrometer (EDS). The results show that the microstructure of Mg-Zn-Nd master alloys has been changed significantly with the addition of Nd. When adding 5wt% Nd, it is clear that a lot of spherical I-phase with high roundness and size below 10μm distributed evenly in the matrix. With the increase of Nd, the number of spherical I-phases is reduced and rod-like phases increased. The growth process and the final growth morphology of quasicrystal phase are restricted by the element Nd, thus the growth rates of all quasicrystal growth surfaces tend to be consistent, which contributes to the formation of spherical quasicrystal phase.

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Periodical:

Advanced Materials Research (Volume 500)

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646-650

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.500.646

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Online since:

April 2012

Authors:

Zhen Wei Zhao, Xin Ying Teng, Guo Rong Zhou

Keywords:

Formation Mechanism, Microstructure, Morpholoy, Spherical Quasicrystal

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