Collapse of defect cascades to dislocation loops in Cu/sub 3/Au
Conference
·
OSTI ID:5549454
TEM and ordered Cu/sub 3/Au were employed to measure the probability of dislocation loop formation as functions of irradiating ion mass (Ar/sup +/, Cu/sup +/ and Kr/sup +/), energy (50 and 100 keV), and irradiation temperature (30 and 300/sup 0/K). Disordered zones were produced at every defect cascade site and imaged in dark-field superlattice reflections. Dislocation loops were imaged in fundamental reflections in the same sample areas to produce an accurate measurement of the probability of the collapse of each cascade to a dislocation loop, within a large set (approx.200) of defect cascades for each irradiation condition. The size distributions of dislocation loops and disordered zones were also measured. Defect cascades collapse to dislocation loops with significant probability (approx.0.5) even at 30/sup 0/K. Other observations include an increasing collapse probability with increasing cascade energy density (increasing ion mass) and with increasing sample irradiation temperature. However, no additional collapse was observed upon annealing from 30 to 300/sup 0/K, and no increase in collapse probability was observed upon increasing the bombarding ion energy from 50 to 100 keV. Disordered zone sizes also increased with increasing ion mass and with increasing sample irradiation temperature (30 to 300/sup 0/K).
- Research Organization:
- Argonne National Lab., IL (USA). Materials Science and Technology Div.; Oxford Univ. (UK); UKAEA Atomic Energy Research Establishment, Harwell
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 5549454
- Report Number(s):
- CONF-860605-22; ON: DE86014529
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360106* -- Metals & Alloys-- Radiation Effects
ALLOYS
ANNEALING
BEAMS
COPPER ALLOYS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DISLOCATIONS
ELECTRON MICROSCOPY
ENERGY RANGE
GOLD ALLOYS
HEAT TREATMENTS
INTERMETALLIC COMPOUNDS
ION BEAMS
KEV RANGE
KEV RANGE 10-100
LINE DEFECTS
MICROSCOPY
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
TRANSMISSION ELECTRON MICROSCOPY
360106* -- Metals & Alloys-- Radiation Effects
ALLOYS
ANNEALING
BEAMS
COPPER ALLOYS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DISLOCATIONS
ELECTRON MICROSCOPY
ENERGY RANGE
GOLD ALLOYS
HEAT TREATMENTS
INTERMETALLIC COMPOUNDS
ION BEAMS
KEV RANGE
KEV RANGE 10-100
LINE DEFECTS
MICROSCOPY
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
TRANSMISSION ELECTRON MICROSCOPY