Abstract
Reaction-sintering of Cu-Ti-B alloys was investigated by heating the mixed powder compacts prepared from copper powder, TiH2 or Cu-Ti alloy powder, and boron powder at temperatures higher than the melting point of Cu.
Cu-TiB2 two-phase alloys were obtained by sintering when the atomic ratio Ti: B in the green compacts was adjusted to 1 : 2 regardless the choice of raw powders.
In the case of sintering the powder compacts prepared by the use of coarse boron powder of about 150 μm in particle size, thin fiber type TiB2, and thin and long needle type TiB2 crystals were precipitated in the copper matrices at the respective sintering temperatures of 1373K and 1473K.
