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

Journal Article · · Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing
 [1];  [2];  [3];  [4];  [2]
  1. Univ. of Michigan, Ann Arbor, MI (United States)
  2. Ames Lab. and Iowa State Univ., Ames, IA (United States)
  3. Ames Lab., Ames, IA (United States)
  4. 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
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

References (12)

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Thermodynamic assessment of the Al–Ca binary system using random solution and associate models journal June 2002
A high-strength, high-conductivity Al–Ti deformation processed metal metal matrix composite journal March 1999
Modeling the electrical resistivity of deformation processed metal–metal composites journal September 2014
Prospects for novel deformation processed Al/Ca composite conductors for overhead high voltage direct current (HVDC) power transmission journal December 2013
Reactive gas atomization processing for Fe-based ODS alloys journal September 2012
The microstructure-strength relationship in a deformation processed Al–Ca composite journal May 2013
Characterization of strength and microstructure in deformation processed Al-Mg composites journal January 1999
Anomalous increase in strength of i n s i t u formed Cu‐Nb multifilamentary composites journal December 1978
Metallic composites processed via extreme deformation: Toward the limits of strength in bulk materials journal December 2010

Cited By (2)

Latest Developments in Modeling and Characterization of Joining Metal Based Hybrid Materials journal May 2018
IWSHM 2017: Damage-scattered wave extraction in an integral stiffened isotropic plate: a baseline-subtraction-free approach journal December 2017

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