Cast aluminum alloys

A high-temperature aluminum alloy with trialuminide compounds that form a crystallized structure selected from the group consisting of L12, D022 and D023, the alloy consisting essentially of 0 to about 2.0 wt % of at least one rare earth element, about 0.5 to about 14 wt % silicon, about 0.25 to about 2.0 wt % copper, about 0.1 to about 3.0 wt % nickel, about 0.1 to about 1.0 wt % iron, about 0.1 to about 2.0 wt % zinc, about 0.1 to about 1.0 wt % magnesium, 0 to about 1.0 wt % silver, about 0.01 to about 0.2 wt % strontium, 0 to about 1.0 wt % manganese, 0 to about 0.5 wt % calcium, about 0.5 wt % germanium, 0 to about 0.5 wt % tin, 0 to about 0.5 wt % cobalt, 0 to about 0.2 wt % titanium, 0 to about 0.1 wt % boron, 0 to about 0.3 wt % cadmium, 0 to about 0.3 wt % chromium, 0 to about 0.5 wt % indium, at least one selected from the group consisting of:

• about 0.1 to about 1 wt % Sc, about 0.1 to about 0.2 wt % Zr, and about 0.25 to about 0.5 wt % Y, and the balance aluminum.