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Processing and Properties of Ni-Based Bulk Metallic Glass via Spark Plasma Sintering of Pulverized Amorphous Ribbons

Published online by Cambridge University Press:  27 November 2017

Alexander. S. Petersen ,
Andrew. M. Cheung ,
Henry. J. Neilson ,
S. Joseph. Poon ,
Gary. J. Shiflet  and
John. J. Lewandowski
Alexander. S. Petersen*
Affiliation:
Department of Physics, University of Virginia, Charlottesville, VA 22904-4714, U.S.A.
Andrew. M. Cheung
Affiliation:
Department of Materials Science and Engineering, University of Virginia, Charlottesville, Virginia 22904-4259, U.S.A.
Henry. J. Neilson
Affiliation:
Department of Materials Science and Engineering, Case Western Reserve University Cleveland, OH 44106-7204, U.S.A.
S. Joseph. Poon
Affiliation:
Department of Physics, University of Virginia, Charlottesville, VA 22904-4714, U.S.A.
Gary. J. Shiflet
Affiliation:
Department of Materials Science and Engineering, University of Virginia, Charlottesville, Virginia 22904-4259, U.S.A.
John. J. Lewandowski
Affiliation:
Department of Materials Science and Engineering, Case Western Reserve University Cleveland, OH 44106-7204, U.S.A.
*
*(Email: [email protected])
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Abstract

Ni-based bulk metallic glasses and composites with high absolute densities exceeding 11 g/cm3 were synthesized via spark plasma sintering of Ni45Co10Ta25Nb20 powders produced from pulverized, melt-spun amorphous ribbons. Optimizing the synthesis via selection of sintering temperature, uniaxial load pressure, and powder mechanical screening yielded samples with relative densities of nearly 100% and hardness values in excess of 12.5 GPa without cracking. Mechanical testing included Weibull modulus determination for hardness and compression testing at 10-3 s-1 and 103 s-1 strain rates. The capability of using spark plasma sintering to fabricate high hardness, high density, large scale metallic glasses is demonstrated. The mechanical properties of these compacted comminuted melt-spun glass ribbons are presented.

Keywords

amorphousmechanical alloyingpowder metallurgy
Type
Articles
Information
MRS Advances , Volume 2 , Issue 61: International Materials Research Congress XXV , 2017 , pp. 3815 - 3820
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Copyright
Copyright © Materials Research Society 2017 

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