TY - JOUR
T1 - Shape Evolution of a Coherent Tetragonal Precipitate in Partially Stabilized Cubic ZrO2
T2 - A Computer Simulation
AU - Wang, Yunzhi
AU - Wang, Hongying
AU - Chen, Long‐Qing ‐Q
AU - Khachaturyan, A. G.
PY - 1993/12
Y1 - 1993/12
N2 - The kinetics of shape evolution of a tetragonal precipitate coherently embedded in a cubic matrix are examined. Specifically, the morphology of tetragonal ZrO2 particles in partially stabilized cubic ZrO2 is discussed. A computer simulation, carried out without any a priori constraint on possible kinetic paths and particle morphologies, shows that a lenslike shape appears during growth of a tetragonal particle. Upon further coarsening, the shape relaxes into a rhombus bounded by facets. Depending on the balance between interfacial and strain energies controlled by the particle size, the facets can be smoothly curved or straight. The predicted particle morphologies are in good agreement with the experimental observations. The kinetic model proposed is quite general for simulating microstructural developments during decomposition involving a crystal lattice symmetry change where elastic strain accommodation plays an important role.
AB - The kinetics of shape evolution of a tetragonal precipitate coherently embedded in a cubic matrix are examined. Specifically, the morphology of tetragonal ZrO2 particles in partially stabilized cubic ZrO2 is discussed. A computer simulation, carried out without any a priori constraint on possible kinetic paths and particle morphologies, shows that a lenslike shape appears during growth of a tetragonal particle. Upon further coarsening, the shape relaxes into a rhombus bounded by facets. Depending on the balance between interfacial and strain energies controlled by the particle size, the facets can be smoothly curved or straight. The predicted particle morphologies are in good agreement with the experimental observations. The kinetic model proposed is quite general for simulating microstructural developments during decomposition involving a crystal lattice symmetry change where elastic strain accommodation plays an important role.
UR - http://www.scopus.com/inward/record.url?scp=0027849079&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0027849079&partnerID=8YFLogxK
U2 - 10.1111/j.1151-2916.1993.tb06605.x
DO - 10.1111/j.1151-2916.1993.tb06605.x
M3 - Article
AN - SCOPUS:0027849079
SN - 0002-7820
VL - 76
SP - 3029
EP - 3033
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
IS - 12
ER -