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Properties Of MgB2/Ga Composites Prepared By Mechanical Alloying

Yoon K., Ahn J.-H.

Archives of Metallurgy and Materials

2015

Vol. 60, iss. 2B

1271--1274

In this study, we examined the effect of Ga-doping and mechanical alloying in MgB2 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 MgB2+Ga. The Ga-doping and ball-milling prior to sintering resulted in the formation of impurity phases such as MgO, Ga5Mg2 and Ga2O3. Lattice parameter of MgB2 increased with increasing ball-milling duration as well as by Ga-doping.