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In-situ study of cascade defects in silver by simultaneous transmission electron microscopy and electrical resistivity measurements at low temperatures

Conference ·
OSTI ID:6198503
; ; ;
A helium-cooled double-tilt specimen stage for transmission electron microscopy (TEM) with the capability of simultaneous electrical resistivity measurements was constructed and used to study defect-production, migration, clustering and recovery processes in ion-irradiated silver. Vacuum-evaporated thin film specimens were irradiated with 1 MeV Kr -ions up to a dose of 4.0 x 10 ions/cmS, at T = 10K in the microscope, using the HVEM-tandem accelerator ion beam interface system in the Argonne National Laboratory Electron Microscopy Center. Cascade defect formation during ion bombardment at the low temperature was directly observed both by TEM and electrical resistivity measurements. Ion bombardment created groups of defect clusters with strong strain fields which gave rise to TEM contrast. The specimen resistivity was increased by 16% during the irradiation. Subsequent microstructural changes and resistivity recovery during isochronal annealing were monitored up to room temperature. 58.3% of the irradiation induced resistivity was recovered, while significant reduction in the size of black spot defect clusters was observed by TEM. A small fraction of clusters disappeared, while no nucleation of new defect clusters was observed.
Research Organization:
Northwestern Univ., Evanston, IL (USA). Dept. of Materials Science and Engineering; Argonne National Lab., IL (USA)
DOE Contract Number:
W-31109-ENG-38
OSTI ID:
6198503
Report Number(s):
CONF-8510168-7; ON: DE86005561
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360106* -- Metals &amp; Alloys-- Radiation Effects
ANNEALING
BEAMS
CHARGED PARTICLES
CRYSTAL STRUCTURE
CRYSTALS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON MICROSCOPY
ELEMENTS
ENERGY RANGE
FILMS
HEAT TREATMENTS
ION BEAMS
IONS
KRYPTON IONS
METALS
MEV RANGE
MEV RANGE 01-10
MICROSCOPY
MICROSTRUCTURE
MONOCRYSTALS
PHYSICAL PROPERTIES
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
SILVER
TRANSITION ELEMENTS
TRANSMISSION ELECTRON MICROSCOPY
ULTRALOW TEMPERATURE