Microstructure and Mechanical Properties of Reticulated Titanium Scrolls

Authors

  • Eunji Hong,

    1. School of Advanced Materials Engineering, Kookmin University, 861-1 Jeongneung-dong, Seongbuk-gu, Seoul 136-702, (Republic of Korea)
    2. Previously with Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, (USA)
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  • Bok Y. Ahn,

    1. Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, (USA)
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  • Daisuke Shoji,

    1. Pentax New Ceramics Division, Hoya Corporation, Tokyo 174-8639, (Japan)
    2. Previously with Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, (USA)
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  • Jennifer A. Lewis,

    1. Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, (USA)
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  • David C. Dunand

    Corresponding author
    1. Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, (USA)
    • Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, (USA).
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  • This work was supported by the U.S. Department of Energy, Division of Materials Science and Engineering under award no. DEFG-02-07ER46471, through the Frederick Seitz Materials Research Laboratory (MRL) at the University of Illinois and by the National Science Foundation (grant DMR-805064) at Northwestern University. We gratefully acknowledge the use of MRL Central Facilities, including the Center for Microanalysis of Materials. E. H. acknowledges supports from the Priority Research Centers Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science, and Technology (2009-0093814) and from National Research Foundation of Korea Grant funded by the Korean Government (KRF-2008-313-D00012).

Abstract

Reticulated titanium scrolls are produced by printing titanium hydride lattices composed of two orthogonal layers of ink filaments, which are then rolled into cylinders and reduced to titanium upon partial vacuum sintering. The resulting three-dimensional titanium scrolls contain a hierarchical pore size distribution composed of macroporosity between patterned filaments and micropores within each filament. These reticulated architectures exhibit an attractive combination of stiffness, strength, and ductility when tested in uniaxial compression.

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