Effect of Reduction and Heat-Treatment Process on Evolution of Cube Texture in NiSW Substrate

Abstract:

The Ni5W alloy substrates with higher strength, lower magnetism and cubic texture were prepared by a powder metallurgy method for YBCO second-generation coated conductor. The results show that the cube texture fraction in the substrate increases obviously with increasing reduction and heat-treatment temperature. X-ray results show that raising total reduction increases actually quantities of cubic grains and nuclei in cold deformed samples. It can be seen that the time corresponding peak of the curve decreases according to relationship between heat-treatment time and (200) preferential orientation, which illustrates that temperature raises the grow rate of cube nuclei. As the results, the better process and excellent Ni5W substrate with 99%~100% cube textured fraction have been obtained by the study.