A deformation-processed Al-matrix/Ca-nanofilamentary composite with low density, high strength, and high conductivity

Tian, Liang; Russell, Alan; Riedemann, Trevor; Mueller, Soeren; Anderson, Iver

doi:10.1016/j.msea.2017.03.010

A deformation-processed Al-matrix/Ca-nanofilamentary composite with low density, high strength, and high conductivity

Journal Article · Mon Mar 06 00:00:00 EST 2017 · Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing

DOI:https://doi.org/10.1016/j.msea.2017.03.010· OSTI ID:1357788

Tian, Liang ^[1]; Russell, Alan ^[2]; Riedemann, Trevor ^[3]; Mueller, Soeren ^[4]; Anderson, Iver ^[2]

Univ. of Michigan, Ann Arbor, MI (United States)
Ames Lab. and Iowa State Univ., Ames, IA (United States)
Ames Lab., Ames, IA (United States)
Technische Univ. Berlin, Berlin (Germany)

Light, strong materials with high conductivity are desired for many applications such as power transmission conductors, fly-by-wire systems, and downhole power feeds. However, it is difficult to obtain both high strength and high conductivity simultaneously in a material. In this study, an Al/Ca (20 vol%) nanofilamentary metal-metal composite was produced by powder metallurgy and severe plastic deformation. Fine Ca metal powders (~200 µm) were produced by centrifugal atomization, mixed with pure Al powder, and deformed by warm extrusion, swaging, and wire drawing to a true strain of 12.9. The Ca powder particles became fine Ca nanofilaments that reinforce the composite substantially by interface strengthening. The conductivity of the composite is slightly lower than the rule-of-mixtures prediction due to minor quantities of impurity inclusions. As a result, the elevated temperature performance of this composite was also evaluated by differential scanning calorimetry and resistivity measurements.

Research Organization:: Ames Laboratory (AMES), Ames, IA (United States)

Sponsoring Organization:: USDOE; USDOE Office of Electricity (OE)

Grant/Contract Number:: AC02-07CH11358

OSTI ID:: 1357788

Alternate ID(s):: OSTI ID: 1415894

Report Number(s):: IS-J--9279; PII: S0921509317303003

Journal Information:: Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing, Journal Name: Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing Journal Issue: C Vol. 690; ISSN 0921-5093

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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