2002 Volume 43 Issue 3 Pages 447-450
L12–(Al, Cr)3Ti/Ti2AlC composites have been prepared by the reactive arc-melting technique using elemental powders of Ti, Al, Cr, and C. Resulting composites have been reinforced using 4.5, 9, and 18 vol%Ti2AlC in a matrix of L12 trialuminide Ti–61 mol%Al–13 mol%Cr alloy. The Ti2AlC particles having a rod-like morphology of 1.5 \\micron width and 5–20 \\micron in length were homogeneously dispersed in the matrix. The matrix grain size was reduced through addition of Ti2AlC particles. These composite materials have revealed higher mechanical properties (bending strength and fracture toughness) than that of the monolithic alloy. This improvement is attributed to the Ti2AlC particles dispersion and to the fine grain of the matrix.