Superconducting Properties of MgB2 with Addition of Other AlB2–type Diborides and Carbon Sources, Prepared Using High Energy Ball Milling and HIP

In the present work it is described the production of MgB2 samples by using the mixture of MgB2 with other diborides, (TaB2, VB2, and AlB2) which have the same C32 hexagonal structure as the MgB2, and simultaneous addition with the diborides and SiC, that contribute with C, to replace B in the crystalline structure of the matrix. As an important result, the critical current density ( Jc ) was improved at low magnetic fields when just the diborides are added. However, when SiC is added simultaneously with the diborides, the result is the improvement of Jc at high fields. The critical temperature ( Tc ) was maintained high.