Copper-Tantalum Metal Matrix Composites Consolidated from Powder Blends by Severe Plastic Deformation

Levin, Zachary S.; Demkowicz, Michael J.; Hartwig, Karl T.

doi:10.3390/met11071010

Open AccessArticle

Copper-Tantalum Metal Matrix Composites Consolidated from Powder Blends by Severe Plastic Deformation

by

Zachary S. Levin

^1,2,*,

Michael J. Demkowicz

² and

Karl T. Hartwig

^2,3

¹

MST-16, Los Alamos National Laboratory, Los Alamos, NM 87545, USA

²

Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77840, USA

³

Shear Form, Inc., Bryan, TX 77801, USA

^*

Author to whom correspondence should be addressed.

Metals 2021, 11(7), 1010; https://doi.org/10.3390/met11071010

Submission received: 27 April 2021 / Revised: 4 June 2021 / Accepted: 17 June 2021 / Published: 24 June 2021

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Abstract

We investigated the effectiveness of severe plastic deformation by equal channel angular extrusion (ECAE) for consolidation of metal powders into metal matrix composites. Equal volumes of copper (Cu) and tantalum (Ta) powders were consolidated at ambient temperature via different ECAE routes. Composites processed by ECAE routes 4E and 4Bc were also processed at 300 °C. The resulting materials were characterized by scanning electron microscopy (SEM) and compression testing. Processing by route 4Bc at 300 °C resulted in the highest compressive strength, lowest anisotropy, and least strain rate sensitivity. We conclude that the superior properties achieved by this route arise from mechanical bonding due to interlocking Cu and Ta phases as well as enhanced metallurgical bonds from contact of pristine metal surfaces when the material is sheared along orthogonal planes.

Keywords: metal matrix composite MMC; equal channel angular extrusion ECAE; copper-tantalum; powder consolidation; severe plastic deformation

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MDPI and ACS Style

Levin, Z.S.; Demkowicz, M.J.; Hartwig, K.T. Copper-Tantalum Metal Matrix Composites Consolidated from Powder Blends by Severe Plastic Deformation. Metals 2021, 11, 1010. https://doi.org/10.3390/met11071010

AMA Style

Levin ZS, Demkowicz MJ, Hartwig KT. Copper-Tantalum Metal Matrix Composites Consolidated from Powder Blends by Severe Plastic Deformation. Metals. 2021; 11(7):1010. https://doi.org/10.3390/met11071010

Chicago/Turabian Style

Levin, Zachary S., Michael J. Demkowicz, and Karl T. Hartwig. 2021. "Copper-Tantalum Metal Matrix Composites Consolidated from Powder Blends by Severe Plastic Deformation" Metals 11, no. 7: 1010. https://doi.org/10.3390/met11071010

APA Style

Levin, Z. S., Demkowicz, M. J., & Hartwig, K. T. (2021). Copper-Tantalum Metal Matrix Composites Consolidated from Powder Blends by Severe Plastic Deformation. Metals, 11(7), 1010. https://doi.org/10.3390/met11071010

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Copper-Tantalum Metal Matrix Composites Consolidated from Powder Blends by Severe Plastic Deformation

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