Sputter-induced compositional modifications in a Ni-Au alloy
Conference
·
OSTI ID:6462599
Surface and subsurface compositional changes induced by heating and by ion sputtering of a Ni-6 at. % Au alloy at temperatures between 25 and 600/sup 0/c were measured in situ, using the ion-scattering-spectroscopy technique. Upon heating, Au atoms segregated to the alloy surface; the enthalpy and entropy of Gibbsian adsorption were found to be -0.45 eV and -1.09k. During sputtering, the steady-state surface composition was noticeably temperature-dependent above approx.400/sup 0/C, which could be interpreted in terms of significant contributions of the second atom layer to the sputtered-atom flux. Steady-state concentration profiles measured after rapid cooling of the target to room temperature were analyzed to gain information about the temperature dependence of the effective altered-layer thickness, from which the radiation-enhanced diffusion coefficients in the bombarded alloy were determined.
- Research Organization:
- Argonne National Lab., IL (USA)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 6462599
- Report Number(s):
- CONF-841246-2; ON: DE85002771
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360106* -- Metals & Alloys-- Radiation Effects
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700209 -- Fusion Power Plant Technology-- Component Development & Materials Testing
ALLOYS
BEAMS
GOLD ALLOYS
HIGH TEMPERATURE
ION BEAMS
IRRADIATION
LOW TEMPERATURE
MEDIUM TEMPERATURE
NICKEL ALLOYS
SPUTTERING
360106* -- Metals & Alloys-- Radiation Effects
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700209 -- Fusion Power Plant Technology-- Component Development & Materials Testing
ALLOYS
BEAMS
GOLD ALLOYS
HIGH TEMPERATURE
ION BEAMS
IRRADIATION
LOW TEMPERATURE
MEDIUM TEMPERATURE
NICKEL ALLOYS
SPUTTERING