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Combinatorial thin film screening to identify single-phase, non-equiatomic high entropy alloys in the MnFeCoNiCu system

Published online by Cambridge University Press:  25 April 2019

Azin Akbari  and
Thomas J. Balk
Azin Akbari
Affiliation:
Department of Chemical and Materials Engineering, University of Kentucky, 177 F. Paul Anderson Tower, Lexington KY 40506, USA
Thomas J. Balk*
Affiliation:
Department of Chemical and Materials Engineering, University of Kentucky, 177 F. Paul Anderson Tower, Lexington KY 40506, USA
*
Address all correspondence to Thomas J. Balk at [email protected]
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Abstract

To identify new face centered cubic high entropy alloys (HEAs), MnFeCoNiCu thin film samples were prepared by simultaneous magnetron sputtering of elements onto Si wafers. This sputtering arrangement yielded compositional gradients in the samples. The films exhibited regions with different phases, some of which were single-phase and non-equiatomic. To screen the crystal structure and composition across film samples, multiple characterization techniques were used: scanning electron microscopy, focused ion beam, energy-dispersive x-ray spectroscopy, x-ray diffraction, and electron backscattered diffraction analysis. Using this combinatorial method, candidate single-phase HEAs were identified and then successfully arc-melted in bulk form, followed by thermomechanical processing.

Type
Research Letters
Information
MRS Communications , Volume 9 , Issue 2 , June 2019 , pp. 750 - 755
Copyright
Copyright © Materials Research Society 2019 

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