Role of excess Mg and heat treatments on microstructure and critical current of MgB[sub2] wires

Serquis, A.; Civale, L.; Hammon, D.L.; Liao, X.Z.; Coulter, J.Y.; Zhu, Y.T.; Peterson, D.E.; Mueller, F.M.
September 2003
Journal of Applied Physics;9/15/2003, Vol. 94 Issue 6, p4024
Academic Journal
Presents a detailed analysis of the effect of heat treatments on the microstructure, magnetization, and transport properties of MgB[sub 2] wires produced by the powder-in-tube method. Measurement of the direct current transport critical current that can be increased or decreased by more than one order of magnitude as compared with the as-drawn wire, depending on the annealing parameters; Correlation of the changes in the critical current with changes in the microstructure.


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