Field ion microscopy study of depleted zones in tungsten after proton irradiation
Depleted zones in tungsten, that resulted from medium-energy proton irradiations, were studied using the Field Ion Microscope (FIM). The shapes and sizes of depleted zones is an important aspect of basic radiation damage. These data can be compared to models that have been suggested as well as aid development of new models. These depleted volumes are of interest not only for an understanding of basic radiation effects, but also because they affect material properties and can act as nucleation sites for voids or gas bubbles. Depleted zones were produced in annealed tungsten wires by irradiation with 600 to 800 MeV protons at the Los Alamos Meson Physics Facility. The defects observed in the irradiated samples included vacancies, depleted zones, grain boundaries, and dislocations. Single vacancies were the most commonly observed defect. Of the samples ''imaged,'' over 50 depleted zones were found within the area of high resolution in the area between the prominent (112) poles in a (110) oriented sample. The number of layers photographed in each sample was dependent upon the initial shape of the tip and ranged from 60 to 200 (110) sequential layers.
- Research Organization:
- New Mexico Inst. of Mining and Technology, Socorro (USA); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Academia Sinica, Beijing, BJ (China). Inst. of Atomic Energy
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 5774214
- Report Number(s):
- LA-UR-86-1156; CONF-860421-29; ON: DE86010165
- Resource Relation:
- Conference: 2. international conference on fusion reactor materials (ICFRM-2), Chicago, IL, USA, 13 Apr 1986; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
TUNGSTEN
ION MICROSCOPY
PHYSICAL RADIATION EFFECTS
DEFECTS
GRAIN BOUNDARIES
IRRADIATION
PROTON BEAMS
BEAMS
CRYSTAL STRUCTURE
ELEMENTS
METALS
MICROSCOPY
MICROSTRUCTURE
NUCLEON BEAMS
PARTICLE BEAMS
RADIATION EFFECTS
TRANSITION ELEMENTS
360106* - Metals & Alloys- Radiation Effects
700209 - Fusion Power Plant Technology- Component Development & Materials Testing