THE MODIFIED TWO INTERSTITIAL MODEL
In the following we discuss the validity of the one interstitial (OIM) of the two interstitial (TIM), and of the modified two interstitial model (MTIM) referring to some results of experiments of a simple and basic as well as of an intriguing nature on pure fcc metals and their alloys. It is shown that experimental results are in agreement with the prediction of the MTIM: item"i)" Interstitials are only mobile at or above ambient temperature in most metallic materials and item"ii)" they are commonly more mobile than vacancies. item"iii)" the mobilities of all point defects increase with increasing flux of the high energy particle, item"iv)" the mobilities of the point defects increase in the presence of sinks e.g. interstitial clusters and dislocations.par It is further shown that item"v)" the chemical rate equations cannot be applied to describe the defect concentrations built up during high energy particle irradiation in most cases. item"vi)" Crowdions are found to be stable in some metallic materials and to be very mobile at very low temperatures.par Finally we discuss some implications of the MTIM to the development of radiation resistant alloys.
Bibliographic Reference: SYMPOSIUM ON THE EFFECTS OF RADIATION ON MATERIALS, ANDOVER, MASS./USA, JUNE 27-29, 1988, AVAILABILITY: CEC-LUXEMBOURG, DG-XIII/A2, BP 1907, MENTIONING PAPER ORA 33937 E
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Record Number: 1989126093100 / Last updated on: 1989-05-01
Available languages: en