SHORT-RANGE-ORDER FORMATION AND VACANCY ANNIHILATION IN AN Au 15 at % Ag ALLOY AFTER QUENCHING

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Abstract
The changes of the electrical resistivity during isochronal and isothermal annealing of a quenched Au 15 at % Ag alloy have been measured for different quenching temperatures and annealing temperatures. Following other authors the observed resistivity changes have been attributed to changes in short-range-order (s.r.o.). The formation of s.r.o. is governed by the quenched-in surplus vacancies. After these have disappeared the remaining thermal vacancies determine the further s.r.o.-formation until the equilibrium of s.r.o. has been established. A numerical analysis leads to values for the activation energies of vacancy formation and migration as well as for selfdiffusion in this alloy. Selfconsistent values are found which are also in good agreement with those in literature

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