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Cryomilling and spark plasma sintering of nanocrystalline magnesium-based alloy

Published online by Cambridge University Press:  15 March 2011

Marta Pozuelo ,
Christopher Melnyk ,
Wei H. Kao  and
Jenn-Ming Yang
Marta Pozuelo*
Affiliation:
Department of Materials Science and Engineering, University of California−Los Angeles, Los Angeles, California 90095
Christopher Melnyk
Affiliation:
California Nanotechnologies Inc., Cerritos, California 90703
Wei H. Kao
Affiliation:
Institute for Technology Advancement, University of California−Los Angeles, Los Angeles, California 90095
Jenn-Ming Yang
Affiliation:
Department of Materials Science and Engineering, University of California−Los Angeles, Los Angeles, California 90095
*
a)Address all correspondence to this author. e-mail: pozuelo@ucla.edu; marta.pozuelo@gmail.com
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Abstract

The microstructure characteristics of nanocrystalline magnesium-based alloy processed by cryomilling and spark plasma sintering were investigated. The as-received and cryomilled powders and the consolidated bulk material were characterized by scanning and transmission electron microscopies, x-ray diffraction, and electron dispersive spectroscopy techniques. The cryomilled powders resulted in an average grain size of 25 nm. After spark plasma sintering, a bimodal grain size distribution with coarse grains around 500 nm and fine grains of 52 nm, which is one of the smallest grain sizes reported in bulk nanostructured Mg alloys, was found. Our results suggest this novel process as a viable method to provide new opportunities for the development of nanostructured Mg-based alloys.

Keywords

CryomillingMgMicrostructure
Type
Articles
Information
Journal of Materials Research , Volume 26 , Issue 7 , 14 April 2011 , pp. 904 - 911
Copyright
Copyright © Materials Research Society 2011

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