Direct observation of the point-defect structure of depleted-zones in ion-irradiated metals
Abstract
Four-pass zone-refined tungsten field-ion microscope specimens were irradiated in-situ at 10 K with 30 keV, Cr(+), Mo(+), or W(+) ions to a total dose of (2 to 10) x 10 to the 12th power ion/sq cm ion and examined by the pulse field-evaporation technique at 10 K. The experimental conditions were such that each depleted zone was created by a single incident-ion. The radial distribution function was determined for each depleted zone, it was found that the vacant lattice sites within the volume of each depleted zone tend to exist in a highly clustered state. The spatial distribution of self-interstitial atoms in a specimen irradiated with 30 keV Cr(+) ions and in a specimen irradiated with 18 keV Au(+) ions, at 10 K, was determined. The vacancy structure of a (220) platelet created by a single 30 keV W(+) ion in a platinum-4.0 at. percent gold alloy.
- Publication:
-
Ph.D. Thesis
- Pub Date:
- January 1978
- Bibcode:
- 1978PhDT........27W
- Keywords:
-
- Depletion;
- Ion Irradiation;
- Lattice Parameters;
- Metal Crystals;
- Microscopy;
- Point Defects;
- Incident Radiation;
- Interstitials;
- Ion Distribution;
- Spatial Distribution;
- Solid-State Physics