Effect of heat treatment on critical current density of Nb50Ti composite with artificial pinning centers

In this paper, Nb50Ti composites with island-shaped artificial pinning centers have been investigated in an attempt to realize the relationship between critical current density and magnetic fields for APC composites under heat treatment condition. The results show that heat treatment process is beneficial to improving the critical current density of Nb50Ti composites with niobium island-shaped artificial pinning centers, and low-temperature (such as 375 deg. C) heat treatment process is very useful to enhance high-field performance. In addition, critical current density of niobium island-shaped APC composite is strongly affected by the density and dimension of artificial pinning centers, but this effect will be reduced by heat treatment process