Abstract
Abstract The electrical resistance of Ni-10at.%Mo quenched from 1200 K has been measured as a function of temperature at various rates of sample heating and cooling. Upon heating, the resistance showed an anomaly at a temperature depending on the heating rate. This effect is attributed to the increasing mobility of quenched-in vacancies and a concomitant formation of short-range order, and an activation energy of 2.4 eV is determined. Samples cooled down from 1200 K at various rates showed a non-linear variation of resistance with temperature only above 710 K. Vacancy controlled short-range ordering stopped at this temperature because of insufficient vacancy mobility.
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