Laser Texturing of Ceramic Superconductors
Original Publication Date: 1989-Oct-01
Included in the Prior Art Database: 2005-Jan-29
Bulk high Tc ceramic superconductors, based on Y1Ba2Cu3Ox and other related materials, show inferior critical properties compared to single crystals and thin films due to anisotropic electrical character and poor intergrain contacts. The grain morphology of these rare earth ceramics can be altered by melt texturing with a CW laser to enhance their superconducting properties. By rastering the laser at appropriate power densities and scan speeds, a crystallization front is formed and propagated over the surface of the bulk superconductor to give dense and aligned microstructures with improved critical properties.