Title :
Macroscopic and microscopic modeling of the growth of YBaCuO bulk material
Author :
Seesselberg, M. ; Schmitz, G.J. ; Nestler, B. ; Steinbach, I.
Author_Institution :
ACCESS e.v., Aachen, Germany
fDate :
6/1/1997 12:00:00 AM
Abstract :
Melt processing of YBaCuO is widely accepted to yield the best superconducting properties in bulk specimens of this material. Modeling of melt processing is a promising tool to optimize the production of bulk YBaCuO material. In a macroscopic simulation, temperature fields in YBaCuO specimen of arbitrary geometry in e. g. Bridgman or VGF furnaces are calculated during solidification. This allows the visualization of the shape of the solidification isotherm and its dependence on cooling rate and the geometries of furnaces and samples. Microscopic modeling of microstructural evolution during YBaCuO growth is of great interest to deepen the understanding of growth kinetics. For this purpose, YBaCuO growth can be simulated numerically using the multiphase field model.
Keywords :
barium compounds; crystal growth from melt; high-temperature superconductors; yttrium compounds; YBaCuO; YBaCuO bulk material; cooling rate; growth; high temperature superconductor; macroscopic simulation; melt processing; microscopic modeling; multiphase field model; solidification; superconducting properties; temperature fields; Furnaces; Geometry; Melt processing; Microscopy; Production; Solid modeling; Superconducting materials; Temperature; Visualization; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
