Abstract
In order to obtain aluminum bronze sintering compact having good mechanical properties, the carbo-thermic reduction was applied to the sintering of Cu-Al powders which surfaces were covered with aluminum oxide layers.
Green compacts of (1) Cu-6.5 mass%Al prealloyed powder (A-powderl), (2) mixed powders of A and graphite (up to 0.5 mass%graphite), (3) Cu-7Al-7Ni-6Fe (mass%) prealloyed powder, (4) mixed powders of copper and Cu-1 1mass%Al alloy (Al content was 6.5 mass%) and (5) Ni-plated A-powders or mixed powders of A and nickel (Ni contents were both 2-3 mass%), were embedded in graphite powder and heated under a reduced CO pressure of 0.03 Pa for 10.8 ks.
The best result was obtained in the case of (4), where the strength and the ductility of the sintered products were high enough to those of the dense material (milled sheet) of the same composition.
