Comparative Studies of MgB2/Mg Nano-Composites and Press-Sintered MgB2 Pellets
Q Li, L Wu, Y Zhu, A R. Moodenbaugh, G Gu, M Suenaga, Z X. Ye, Daniel A. Fischer
We present our studies of superconducting and microstructural properties of bulk MgB2/Mg nano-composites and press-sintered MgB2. TEM investigation revealed that the composites are very dense, consisting of nano-sized MgB2 grains connected by the well-defined clean grain boundaries (GB). Both amorphous and structural intact GBs were observed in thepress-sintered samples. Magnetization and transport measurements showed that the composite carried over 1 MA/cm2 critical current density (Jc) at 5 K and self-field, while the pressed sintered MgB2 has Jc approximately} 0.25 MA/cm2 at 5 K and self-field. The origin of substantially higher Jc found in the composites is mostly due to their nano-sized grains and cleangrain boundaries.
, Wu, L.
, Zhu, Y.
, Moodenbaugh, A.
, Gu, G.
, Suenaga, M.
, Ye, Z.
and Fischer, D.
Comparative Studies of MgB<sub>2</sub>/Mg Nano-Composites and Press-Sintered MgB<sub>2</sub> Pellets, IEEE Transactions on Applied Superconductivity
(Accessed December 7, 2023)