Transport Jc, MgB2 Area and HT Condition
Table 2 shows the MgB2 area and MgB2 area fraction of each sample. For MA-series samples with HT at 650 oC, the area of MgB2 layer increases as HT time raised from 2 h through 4 h to 6 h. In the composite billet, the volume of 15 mol% Mg + B mixture can be calculated through the equation:
\(V\left(0.15Mg+2B\right)=\frac{0.353M\left(Mg\right)}{p\left(Mg\right)}+\frac{2M\left(B\right)}{p\left(B\right)}\)
\(V\left(0.15Mg+2B\right)=\frac{0.353M\left(Mg\right)}{p\left(Mg\right)}+\frac{2M\left(B\right)}{p\left(B\right)}\)