Simulations of the kinetic growth of YBa2Cu307-delta grains

Using simple kinetic and geometric arguments, we have developed a computer model which simulates the growth of melt-textured YBa2Cu307-delta grains along the a-b planes. A chemical bonding anisotropy along the main lattice directions is taken into account by the model. We have also considered the presence of Y2BaCu05 particles becoming trapped or not in the solidifying YBa2Cu307-delta front. The model simulates the fomation of 211 segregation patterns in the 123 matrix. An interpretation of these is attempted in terms of trapping anisotropy due to intrinsic crystallographic anisotropy.