Abstract
The metal organic deposition (MOD) using a precursor solution of trifluoroacetates (TFA) is known to be a promising low cost nonvacuum process for fabricating a high-Jc coated conductor of YBa2Cu3O7-x (YBCO or Y123) film. However, the details of the growth process of Y123 crystals are still unknown. To clarify the growth mechanism of Y123 crystals in the film, the growth processes of Y123 crystals were studied experimentally through transmission electron microscopy (TEM) observations of the specimens quenched during the growth of Y123 crystals on LaAlO3 (LAO) substrates, and the continuous heating and time–temperature transformation (CHT/TTT) diagrams and the growth model of c/a-oriented Y123 crystals were obtained. Furthermore, the growth processes of faceted Y123 crystals with various crystal orientations were simulated by the two-dimensional numerical method using c- and a-axis growth rate functions. The formation processes of microstructures of Y123 crystals were visualized using the growth model and the simulation.
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