Effects of Cooling Rate on Quasicrystal Microstructures of Mg-Zn-Y Alloys

Abstract:

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Mg72.5Zn26Y1.5 quasicrystal alloys were investigated under different solidification conditions. The specimens of Mg-Zn-Y alloys with cooling rates from 13.2K/s to 69.8K/s were gathered by a designed multi-channel temperature acquiring system and then the microstructures and phase evolution of the alloys were analyzed. The results show that the precipitation temperature of icosahedral quasicrystal phase (I-phase) increased with cooling rate increased from 13.2 K/s to 69.8K/s. The microstructure was mainly made up of α-Mg, I-phase and Mg7Zn3 phase. Meanwhile, the quasi-crystalline morphology was significantly different in the experiments. It changed from five (six) petals to the big pentagon with the decreased cooling rate.

Info:

Periodical:

Advanced Materials Research (Volumes 160-162)

Edited by:

Guojun Zhang and Jessica Xu

Pages:

901-905

DOI:

10.4028/www.scientific.net/AMR.160-162.901

Citation:

Y. M. Wang et al., "Effects of Cooling Rate on Quasicrystal Microstructures of Mg-Zn-Y Alloys", Advanced Materials Research, Vols. 160-162, pp. 901-905, 2011

Online since:

November 2010

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Price:

$35.00

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