TY - JOUR
T1 - Thermodynamic stability of binary nanocrystalline alloys
T2 - Analysis of solute and excess vacancy
AU - Gong, M. M.
AU - Liu, F.
AU - Zhang, K.
PY - 2011/12
Y1 - 2011/12
N2 - Regarding that the excess volume in grain boundaries (GBs) is released as the vacancies which are accommodated by the crystal bulk during grain growth, a free-energy function for binary nanocrystalline solid solution is proposed, based on the pairwise nearest-neighbor interactions. The model, for the given composition and temperature, predicts an equilibrium grain size, subjected to a mixed effect due to solute segregation and due to excess vacancies. Furthermore, excess-vacancy-inhibited grain coarsening can be attained, which plays a minor role in holding the thermal stability of nanocrystalline alloys, as compared to the effect of solute segregation.
AB - Regarding that the excess volume in grain boundaries (GBs) is released as the vacancies which are accommodated by the crystal bulk during grain growth, a free-energy function for binary nanocrystalline solid solution is proposed, based on the pairwise nearest-neighbor interactions. The model, for the given composition and temperature, predicts an equilibrium grain size, subjected to a mixed effect due to solute segregation and due to excess vacancies. Furthermore, excess-vacancy-inhibited grain coarsening can be attained, which plays a minor role in holding the thermal stability of nanocrystalline alloys, as compared to the effect of solute segregation.
UR - http://www.scopus.com/inward/record.url?scp=83555165149&partnerID=8YFLogxK
U2 - 10.1007/s00339-011-6501-2
DO - 10.1007/s00339-011-6501-2
M3 - 文章
AN - SCOPUS:83555165149
SN - 0947-8396
VL - 105
SP - 927
EP - 934
JO - Applied Physics A: Materials Science and Processing
JF - Applied Physics A: Materials Science and Processing
IS - 4
ER -