Abstract
Supersaturated AI-10 at % Si solid solutions were prepared by using high pressure and high temperature techniques. The elastic constants, lattice parameters, electrical resistivity, density and hardness of these obtained specimens were measured by the process of isochronal and isothermal aging. For isochronal temperatures of about 100°C to 300°C, rapid changes of several characteristics were observed. In the aging process, the variations of elastic constants which had two stages appeared and the lattice parameters overshot those of pure-aluminum. The relation between the Al-matrix and the precipitated phase of silicon and the activation energies for precipitation are also discussed.
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