TY - JOUR
T1 - Atomistic Simulation of Y-Doped alpha-Alumina Interfaces
AU - Galmarini, S
AU - Aschauer, U
AU - Bowen, P
AU - Parker, S C
PY - 2008
Y1 - 2008
N2 - The exact mechanism of creep resistance enhancement due to yttrium (Y) doping in alpha-alumina is still subject to speculation, although it is known that dopants segregate strongly to grain boundaries. The current work applies atomistic simulation techniques to the study of segregation to a reasonable number of interfaces in Y-doped alpha-alumina. Y is shown to segregate stronger to surfaces than grain boundaries and to form ordered structures at the interfaces, which may decrease diffusion coefficients. These Y-ordered regions may act as nucleation sites for YAG precipitates particularly for rapid sintering techniques.
AB - The exact mechanism of creep resistance enhancement due to yttrium (Y) doping in alpha-alumina is still subject to speculation, although it is known that dopants segregate strongly to grain boundaries. The current work applies atomistic simulation techniques to the study of segregation to a reasonable number of interfaces in Y-doped alpha-alumina. Y is shown to segregate stronger to surfaces than grain boundaries and to form ordered structures at the interfaces, which may decrease diffusion coefficients. These Y-ordered regions may act as nucleation sites for YAG precipitates particularly for rapid sintering techniques.
UR - http://www.scopus.com/inward/record.url?scp=56749155349&partnerID=8YFLogxK
UR - http://dx.doi.org/10.1111/j.1551-2916.2008.02619.x
U2 - 10.1111/j.1551-2916.2008.02619.x
DO - 10.1111/j.1551-2916.2008.02619.x
M3 - Article
SN - 0002-7820
VL - 91
SP - 3643
EP - 3651
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
IS - 11
ER -