Precipitation and phase stability of solid Kr in cavities after room-temperature implantation of Al. Revision
Conference
·
OSTI ID:5400851
Microstructural changes and the precipitation of Kr in thin (approx.70 nm) films of Al during 65 keV Kr/sup +/ ion implantation at room temperature have been studied with Transmission Electron Microscopy (TEM), thermal desorption spectroscopy, and Rutherford backscattering. For fluences below 2 x 10/sup 19/ Kr/sup +/m/sup -2/, isolated dislocation loops were observed to evolve into a dislocation network. Above fluences of 2 x 10/sup 19/ Kr/sup +/m/sup -2/, the microstructure is dominated by a high density of cavities whose average size increases with fluence. The appearance of additional electron diffraction reflections indicates that the cavities contain solid fcc Kr that is epitaxially aligned with the fcc Al matrix. Above fluences of 2 x 10/sup 20/ Kr/sup +/m/sup -2/, an increasing fraction of the Kr within larger cavities is in a fluid phase. The thermal stability of the microstructure and the phase stability of solid Kr, in cavities, was investigated up to 910/sup 0/K by in situ TEM annealing experiments and by insitu thermal cycling between approx.90 and 300/sup 0/K. Melting and solidification of Kr in cavities was observed and compared to the melting curve for bulk solid Kr.
- Research Organization:
- Argonne National Lab., IL (USA). Materials Science and Technology Div.; Kernforschungsanlage Juelich G.m.b.H. (Germany, F.R.)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 5400851
- Report Number(s):
- CONF-8604103-2; ON: DE86014572
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360106* -- Metals & Alloys-- Radiation Effects
ALUMINIUM
ANNEALING
BEAMS
CHARGED PARTICLES
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DESORPTION
DISLOCATIONS
ELASTIC SCATTERING
ELECTRON MICROSCOPY
ELEMENTS
ENERGY RANGE
HEAT TREATMENTS
ION BEAMS
ION IMPLANTATION
IONS
KEV RANGE
KEV RANGE 10-100
KRYPTON IONS
LINE DEFECTS
METALS
MICROSCOPY
MICROSTRUCTURE
RUTHERFORD SCATTERING
SCATTERING
THERMAL CYCLING
TRANSMISSION ELECTRON MICROSCOPY
360106* -- Metals & Alloys-- Radiation Effects
ALUMINIUM
ANNEALING
BEAMS
CHARGED PARTICLES
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DESORPTION
DISLOCATIONS
ELASTIC SCATTERING
ELECTRON MICROSCOPY
ELEMENTS
ENERGY RANGE
HEAT TREATMENTS
ION BEAMS
ION IMPLANTATION
IONS
KEV RANGE
KEV RANGE 10-100
KRYPTON IONS
LINE DEFECTS
METALS
MICROSCOPY
MICROSTRUCTURE
RUTHERFORD SCATTERING
SCATTERING
THERMAL CYCLING
TRANSMISSION ELECTRON MICROSCOPY