Design of Stable Nanocrystalline Alloys
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DesignofStableNanocrystallineAlloys_chookajorn.pdf
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Author(s)
Chookajorn, Tongjai
Murdoch, Heather Ann
Schuh, Christopher A.
Date Issued
August 2012
Journal
Science
Publisher
American Association for the Advancement of Science (AAAS)
Citation
Chookajorn, T., H. A. Murdoch, and C. A. Schuh. “Design of Stable Nanocrystalline Alloys.” Science 337, no. 6097 (August 23, 2012): 951-954.
Version
Author's final manuscript
Abstract
Nanostructured metals are generally unstable; their grains grow rapidly even at low temperatures, rendering them difficult to process and often unsuitable for usage. Alloying has been found to improve stability, but only in a few empirically discovered systems. We have developed a theoretical framework with which stable nanostructured alloys can be designed. A nanostructure stability map based on a thermodynamic model is applied to design stable nanostructured tungsten alloys. We identify a candidate alloy, W-Ti, and demonstrate substantially enhanced stability for the high-temperature, long-duration conditions amenable to powder-route production of bulk nanostructured tungsten. This nanostructured alloy adopts a heterogeneous chemical distribution that is anticipated by the present theoretical framework but unexpected on the basis of conventional bulk thermodynamics.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1126/science.1224737
