MACROSCOPIC AND MICROSCOPIC MODELING OF THE GROWTH OF YBACUO BULK MATERIAL

Melt processing of YBaCuO is widely accepted to yield the best superco nducting properties in bulk specimens of this material. Modeling of me lt processing is a promising tool to optimize the production of bulk Y BaCuO material. In a macroscopic simulation, temperature fields in YBa CuO specimen of arbitrary geometry in e. g. Bridgman or VGF furnaces a re 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 interes t to deepen the understanding of growth kinetics. For this purpose, YB aCuO growth can be simulated numerically using the multiphase field mo del.