http://repository.iitr.ac.in/handle/123456789/18189| Title: | Thermal stability of nanocrystalline copper alloyed with antimony |
| Authors: | Atwater M.A. Mula, Suhrit Scattergood R.O. Koch C.C. |
| Published in: | Proceedings of Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science |
| Abstract: | Nanocrystalline copper (Cu) was generated by cryogenic, high-energy ball milling. Antimony (Sb) was added to investigate its utility in stabilizing the grain structure during annealing up to a maximum temperature of 1073 K (800 C). When alloyed with Sb in quantities up to 1 at. pct, thermal stability was maintained up to 673 K (400 C). Cu and Sb have very different molar volumes which can drive segregation of the solute due to the elastic strain energy and hence stabilize the grain size by reducing grain boundary energy. The elastic mismatch of Sb in Cu is calculated to be quite large (113 kJ/mol) when molar volume is used, but when an equivalent equation using atomic radius is applied, the driving force is nearly an order of magnitude lower (∼12 kJ/mol). The low elastic mismatch is corroborated by the large equilibrium solubility of Sb in Cu. The results for the Cu-Sb system are compared to the nanocrystalline Ni-W system and the large amount of equilibrium solubility of the solute in both cases is thought to hinder thermal stabilization since segregation is not strongly favored. © 2013 The Minerals, Metals & Materials Society and ASM International. |
| Citation: | Proceedings of Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, (2013), 5611- 5616 |
| URI: | https://doi.org/10.1007/s11661-013-1891-8 http://repository.iitr.ac.in/handle/123456789/18189 |
| Issue Date: | 2013 |
| Keywords: | Elastic strain energy Equilibrium solubilities Grain-boundary energy High-energy ball milling Maximum temperature Nanocrystalline copper Nanocrystallines Thermal stabilization Ball milling Copper Grain boundaries Grain size and shape Segregation (metallography) Solubility Thermodynamic stability Volume measurement Antimony |
| ISSN: | 10735623 |
| Author Scopus IDs: | 16315093500 12783902100 7006411003 57203364844 |
| Author Affiliations: | Atwater, M.A., Department of Materials Science and Engineering, North Carolina State University, 911 Partner's Way, EB I, Raleig, NC 27606, United States, Department of Applied Engineering, Safety and Technology, Millersville University, Millersville, PA 17551, United States Mula, S., Department of Materials Science and Engineering, North Carolina State University, 911 Partner's Way, EB I, Raleig, NC 27606, United States, Department of Metallurgical and Materials Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, India Scattergood, R.O., Department of Materials Science and Engineering, North Carolina State University, 911 Partner's Way, EB I, Raleig, NC 27606, United States Koch, C.C., Department of Materials Science and Engineering, North Carolina State University, 911 Partner's Way, EB I, Raleig, NC 27606, United States |
| Funding Details: | The authors wish to acknowledge the support of this research by the Office of Naval Research under grant number N00014-10-1-0168. |
| Corresponding Author: | Atwater, M.A.; Department of Materials Science and Engineering, North Carolina State University, 911 Partner's Way, EB I, Raleig, NC 27606, United States; email: maatwat2@ncsu.edu |
| Appears in Collections: | Conference Publications [MT] |
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