The effect of impregnation by resin and CNT compound on the mechanical and magnetic properties of YBCO superconductor

Bulk YBCO superconductor was manufactured with the top-seeded melt grown method. The artificial hole with 0.5 mm and 0.7 mm parallel to the c-axis was mechanically drilled. The YBCO bulks containing artificial holes were impregnated by the mixture of resin and CNT (carbon nano tube), respectively. In order to estimate the influence of the hole and impregnation by CNT and resin, the magnetic and mechanical properties were measured and compared with before and after reinforcement. It was confirmed that the maximum magnetic flux density of the sample without any holes was 0.243 T, while the maximum magnetic flux density of sample with 0.5 mm and 0.7 mm holes in diameter was around 0.244 T and 0.208 T, respectively. As compared with the results before and after reinforcement, the trapped field value taken on the perforated YBCO is somewhat higher than the ones after reinforcement.