Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1635485 | Rare Metals | 2006 | 5 Pages |
Abstract
The fundamental thermodynamic functions of enthalpy, entropy, and Gibbs free energy, as functions of the excess free volume at interfaces, temperature, and grain size, have been derived for single-phase metal nanocrystals. The model was applied to predict the thermal features of nano-grain boundaries and the characteristics of phase transformation in nanocrystalline metals, such as the transformation temperature and the critical grain size for phase transformation at a given temperature. The model predictions have been verified by experimental studies on the β-Co â α-Co phase transformation in nanocrystalline Co prepared by ball milling.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
SONG Xiaoyan, LI Lingmei, ZHANG Jiuxing,