Materials surface modification by plasma bombardment under simultaneous erosion and redeposition conditions
The first in-depth investigation of surface modification of materials by continuous, high-flux argon plasma bombardment under simultaneous erosion and redeposition conditions have been carried out for copper and 304 stainless steel using the PISCES facility. The plasma bombardment conditions are: incident ion flux range from 10/sup 17/ to 10/sup 19/ ions sec/sup -1/cm/sup -2/, total ion fluence is controlled between 10/sup 19/ and 10/sup 22/ ions cm/sup -2/, electron temperature range from 5 to 15 eV, and plasma density range from 10/sup 11/ to 10/sup 13/cm/sup -3/. The incident ion energy is 100 eV. The sample temperature is between 300 and 700K. Under redeposition dominated conditions, the material erosion rate due to the plasma bombardment is significantly smaller (by a factor up to 10) than that can be expected from the classical ion beam sputtering yield data. It is found that surface morphologies of redeposited materials strongly depend on the plasma bombardment condition. The effect of impurities on surface morphology is elucidated in detail. First-order modelings are implemented to interpret the reduced erosion rate and the surface evolution. Also, fusion related surface properties of redeposited materials such as hydrogen reemission and plasma driven permeation have been characterized.
- Research Organization:
- California Univ., Los Angeles (USA). Center for Plasma Physics and Fusion Engineering; Sandia National Labs., Livermore, CA (USA). Physics Research Div.; Association Euratom-Max-Planck-Institut fuer Plasmaphysik, Garching (Germany, F.R.)
- DOE Contract Number:
- AS03-84ER52104
- OSTI ID:
- 5308159
- Report Number(s):
- UCLA/PPG-992; CONF-860582-1; ON: DE86014345
- Resource Relation:
- Conference: Workshop on surface modification by plasma-surface interactions, Princeton, NJ, USA, 1 May 1986; Other Information: Portions of this document are illegible in microfiche products. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COPPER
EROSION
SPUTTERING
STAINLESS STEEL-304
ARGON IONS
DEPOSITION
PLASMA DENSITY
ALLOYS
CHARGED PARTICLES
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
ELEMENTS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
IONS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
METALS
NICKEL ALLOYS
STAINLESS STEELS
STEELS
TRANSITION ELEMENTS
700209* - Fusion Power Plant Technology- Component Development & Materials Testing