Synthesis and characterization of nanocrystalline alloys in the binary Ni-Co system/
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2004.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2006
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| Online Access: | http://hdl.handle.net/1721.1/32269 |
| _version_ | 1826214453732966400 |
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| author | Wu, Bruce Y. C., 1980 |
| author2 | Christopher A. Schuh. |
| author_facet | Christopher A. Schuh. Wu, Bruce Y. C., 1980 |
| author_sort | Wu, Bruce Y. C., 1980 |
| collection | MIT |
| description | Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2004. |
| first_indexed | 2024-09-23T16:05:17Z |
| format | Thesis |
| id | mit-1721.1/32269 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T16:05:17Z |
| publishDate | 2006 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/322692019-04-11T07:28:08Z Synthesis and characterization of nanocrystalline alloys in the binary Ni-Co system/ Wu, Bruce Y. C., 1980 Christopher A. Schuh. Massachusetts Institute of Technology. Dept. of Materials Science and Engineering. Massachusetts Institute of Technology. Dept. of Materials Science and Engineering. Materials Science and Engineering. Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2004. "June 2004." Includes bibliographical references (leaves 93-96). Nanocrystalline Ni-Co alloys were synthesized using pulsed electrodeposition from a Watts-type bath, and the various plating parameters were systematically varied to examine their effect on the composition, quality, and structure of the resulting deposits. Increasing the pH of the plating bath and/or the average plating current density increased the Ni content of the deposits, but both of these parameters exhibited rather narrow processing windows for the preparation of high-quality deposits. The addition of saccharin during plating was observed both to reduce the crystallographic texture of the Ni-Co alloys and to refine the grain structure. Owing to the low stacking fault energy of Co, many of the alloy deposits exhibited a large density of nanoscale twins. The unique dual-scale grain and nano-twin structure found here caused apparent discrepancies in the grain size measured by XRD and by other microscopy techniques, and also resulted in unique trends in hardness. This thesis lays the groundwork for future tailoring of nanostructured alloys to explore how twins and stacking faults influence their strength and ductility. by Bruce Y.C. Wu. S.M. 2006-03-29T18:29:25Z 2006-03-29T18:29:25Z 2004 Thesis http://hdl.handle.net/1721.1/32269 56029570 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 100 leaves 3862057 bytes 3860069 bytes application/pdf application/pdf application/pdf Massachusetts Institute of Technology |
| spellingShingle | Materials Science and Engineering. Wu, Bruce Y. C., 1980 Synthesis and characterization of nanocrystalline alloys in the binary Ni-Co system/ |
| title | Synthesis and characterization of nanocrystalline alloys in the binary Ni-Co system/ |
| title_full | Synthesis and characterization of nanocrystalline alloys in the binary Ni-Co system/ |
| title_fullStr | Synthesis and characterization of nanocrystalline alloys in the binary Ni-Co system/ |
| title_full_unstemmed | Synthesis and characterization of nanocrystalline alloys in the binary Ni-Co system/ |
| title_short | Synthesis and characterization of nanocrystalline alloys in the binary Ni-Co system/ |
| title_sort | synthesis and characterization of nanocrystalline alloys in the binary ni co system |
| topic | Materials Science and Engineering. |
| url | http://hdl.handle.net/1721.1/32269 |
| work_keys_str_mv | AT wubruceyc1980 synthesisandcharacterizationofnanocrystallinealloysinthebinarynicosystem |