Design of Stable Nanocrystalline Alloys
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 framew...
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| Format: | Article |
| Language: | en_US |
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American Association for the Advancement of Science (AAAS)
2013
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| Online Access: | http://hdl.handle.net/1721.1/80308 https://orcid.org/0000-0001-9856-2682 https://orcid.org/0000-0001-6844-3594 |
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| author | Chookajorn, Tongjai Murdoch, Heather Ann Schuh, Christopher A. |
| author2 | Massachusetts Institute of Technology. Department of Materials Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Materials Science and Engineering Chookajorn, Tongjai Murdoch, Heather Ann Schuh, Christopher A. |
| author_sort | Chookajorn, Tongjai |
| collection | MIT |
| description | 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. |
| first_indexed | 2024-09-23T14:08:03Z |
| format | Article |
| id | mit-1721.1/80308 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T14:08:03Z |
| publishDate | 2013 |
| publisher | American Association for the Advancement of Science (AAAS) |
| record_format | dspace |
| spelling | mit-1721.1/803082022-10-01T19:25:07Z Design of Stable Nanocrystalline Alloys Chookajorn, Tongjai Murdoch, Heather Ann Schuh, Christopher A. Massachusetts Institute of Technology. Department of Materials Science and Engineering Schuh, Christopher A. Chookajorn, Tongjai Murdoch, Heather Ann Schuh, Christopher A. 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. United States. Army Research Office (Grant W911NF-09-1-0422) 2013-08-27T17:19:23Z 2013-08-27T17:19:23Z 2012-08 2012-05 Article http://purl.org/eprint/type/JournalArticle 0036-8075 1095-9203 http://hdl.handle.net/1721.1/80308 Chookajorn, T., H. A. Murdoch, and C. A. Schuh. “Design of Stable Nanocrystalline Alloys.” Science 337, no. 6097 (August 23, 2012): 951-954. https://orcid.org/0000-0001-9856-2682 https://orcid.org/0000-0001-6844-3594 en_US http://dx.doi.org/10.1126/science.1224737 Science 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. application/pdf American Association for the Advancement of Science (AAAS) Prof. Ceder via Angie Locknar |
| spellingShingle | Chookajorn, Tongjai Murdoch, Heather Ann Schuh, Christopher A. Design of Stable Nanocrystalline Alloys |
| title | Design of Stable Nanocrystalline Alloys |
| title_full | Design of Stable Nanocrystalline Alloys |
| title_fullStr | Design of Stable Nanocrystalline Alloys |
| title_full_unstemmed | Design of Stable Nanocrystalline Alloys |
| title_short | Design of Stable Nanocrystalline Alloys |
| title_sort | design of stable nanocrystalline alloys |
| url | http://hdl.handle.net/1721.1/80308 https://orcid.org/0000-0001-9856-2682 https://orcid.org/0000-0001-6844-3594 |
| work_keys_str_mv | AT chookajorntongjai designofstablenanocrystallinealloys AT murdochheatherann designofstablenanocrystallinealloys AT schuhchristophera designofstablenanocrystallinealloys |