Abstract
Functional ceramics MgAlB 14 disks were prepared by a two-step heat treatment. In the first step, Mg 6AlB 14 disks were fabricated through composition of uniformly mixed Mg, Al, and B powders in the form of pressed disks heated at 850 °C in closed argon atmosphere. And in the second step, target MgAlB 14 disks were obtained by decomposition of the Mg 6AlB 14 disks sintered in vacuum. It has been found that the main peaks of MgAlB 14 were sharp except the common impurity-MgAl 2O 4 according to X-ray diffractions (XRD). The nano-hardness of the sample was about 11 GPa. And the heat treatment effects in the second step on the phase formation of MgAlB 14 were also studied.
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