Skip navigation
Please use this identifier to cite or link to this item: 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]

Files in This Item:
There are no files associated with this item.
Show full item record


Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.