Properties Of MgB2/Ga Composites Prepared By Mechanical Alloying

Abstract

In this study, we examined the effect of Ga-doping and mechanical alloying in MgB 2 on microstructural and phase evolution. A comparison was made between in-situ and ex-situ processed Mg-B-Ga samples. Densification was markedly improved by ex-situ sintering of ball-milled MgB 2 +Ga. The Ga-doping and ball-milling prior to sintering resulted in the formation of impurity phases such as MgO, Ga 5 Mg 2 and Ga 2 O 3 . Lattice parameter of MgB 2 increased with increasing ball-milling duration as well as by Ga-doping.