The work presented here was motivated by the need to develop a predictive model for thermodynamic stabilization of binary alloys that is applicable to strongly segregating size-misfit solutes, and that can use available input data for a wide range of solvent-solute combinations. This will serve as a benchmark for selecting solutes and assessing the possible contribution of thermodynamic stabilization for development of high-temperature nanocrystalline alloys. Following a regular solution model that distinguishes the grain boundary and grain interior volume fractions by a transitional interface in a closed system, we include both the chemical and elastic strain energy contributions to the mixing enthalpy ΔHmix using an appropriately scaled linear superposition. The total Gibbs mixing free energy ΔGmix is minimized with respect to simultaneous variations in the grain-boundary volume fraction and the solute contents in the grain boundary and grain interior. The Lagrange multiplier method was used to obtain numerical solutions with the constraint of fixed total solute content. The model predictions are presented using a parametric variation of the required input parameters. Applications are then given for the dependence of the nanocrystalline grain size on temperature and total solute content for selected binary systems where experimental results suggest that thermodynamic stabilization could be effective.
Skip Nav Destination
Article navigation
14 February 2013
Research Article|
February 13 2013
Thermodynamic stabilization of nanocrystalline binary alloys
Mostafa Saber;
Mostafa Saber
a)
Department of Materials Science and Engineering, North Carolina State University
, 911 Partners Way, Room 3002, Raleigh, North Carolina 27695-7907, USA
Search for other works by this author on:
Hasan Kotan;
Hasan Kotan
Department of Materials Science and Engineering, North Carolina State University
, 911 Partners Way, Room 3002, Raleigh, North Carolina 27695-7907, USA
Search for other works by this author on:
Carl C. Koch;
Carl C. Koch
Department of Materials Science and Engineering, North Carolina State University
, 911 Partners Way, Room 3002, Raleigh, North Carolina 27695-7907, USA
Search for other works by this author on:
Ronald O. Scattergood
Ronald O. Scattergood
Department of Materials Science and Engineering, North Carolina State University
, 911 Partners Way, Room 3002, Raleigh, North Carolina 27695-7907, USA
Search for other works by this author on:
a)
Author to whom correspondence should be addressed. Electronic mail: msaber@ncsu.edu. Tel.: +1-919-515-2377. Fax: +1-919-515-7724.
J. Appl. Phys. 113, 063515 (2013)
Article history
Received:
November 20 2012
Accepted:
January 28 2013
Citation
Mostafa Saber, Hasan Kotan, Carl C. Koch, Ronald O. Scattergood; Thermodynamic stabilization of nanocrystalline binary alloys. J. Appl. Phys. 14 February 2013; 113 (6): 063515. https://doi.org/10.1063/1.4791704
Download citation file:
Sign in
Don't already have an account? Register
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Sign in via your Institution
Sign in via your InstitutionPay-Per-View Access
$40.00
Citing articles via
A step-by-step guide to perform x-ray photoelectron spectroscopy
Grzegorz Greczynski, Lars Hultman
GaN-based power devices: Physics, reliability, and perspectives
Matteo Meneghini, Carlo De Santi, et al.
The future of quantum computing with superconducting qubits
Sergey Bravyi, Oliver Dial, et al.