THEORY OF ANNEALING OF VACANCIES AND DIVACANCIES IN PURE METALS
For presentation at Faraday Society Meeting at Saclay, France, April 11- 12, 1961. The kinetic equations for the simultaneous annealing of mono- and divacancies, including the formation and dissociation of divacancies, were examined both analytically and on an analog computer. Five regions of different kinetic behavior were found as a function of annealing temperature, and the range of validity of these regions is a sensitive function of the quench temperature. One of these regions is the simple decay of quenched-in divacancies, while the other four involve interactions between monoand divacancies. Useful analytic approximations were made for two of these regions, a quadratic decay and a quadratic plus linear one, both of which were observed experimentally. Initial decay in annealing, also observed experimentally, is shown by the machine solutions but cannot be approximated analytically. This decay is related to the buildup of divacancy concentration (which goes through a maximum) and is favored by high divacancy binding energy, high initial vacancy concentration, and low divacancy mobility. The arnealing curve s, in general, cannot be normalized with respect to initial defect concentration. Difficulties in obtaining divacancy migration energies are discussed. (auth)
- Research Organization:
- Brookhaven National Lab., Upton, N.Y.
- NSA Number:
- NSA-15-014700
- OSTI ID:
- 4051280
- Report Number(s):
- BNL-5214
- Resource Relation:
- Other Information: For presentation at Faraday Society Meeting at Saclay, France, April 11-12, 1961. Orig. Receipt Date: 31-DEC-61
- Country of Publication:
- United States
- Language:
- English
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