Reduction of surface erosion caused by helium blistering: comparison between vacuum-cast and sintered-beryllium
The blister formation and the erosion associated with blistering in a vacuum cast beryllium foil and in a foil of sintered beryllium powder have been investigated for irradiation at room temperature and at 600$sup 0$C with 100 keV $sup 4$He$sup +$ ions for total doses of 0.5 to 1.0 C cm$sup -2$. For room temperature irradiation the blisters in sintered beryllium powder are smaller in size than in vacuum cast beryllium. For irradiation at 600$sup 0$C large scale exfoliation of blisters was observed for vacuum cast beryllium but only small amount of exfoliation was seen for sintered beryllium powder. The results show a reduction in erosion rate in sintered beryllium as compared to the erosion rate in vacuum cast beryllium. For room temperature irradiation no erosion rate could be determined for the sintered beryllium foil since no blister exfoliation was observed. For 600$sup 0$C irradiation the erosion rate for sintered beryllium foil is more than an order of magnitude smaller than for vacuum cast beryllium. (auth)
- Research Organization:
- Argonne National Lab., Ill. (USA)
- DOE Contract Number:
- W-31109-ENG-38
- NSA Number:
- NSA-33-009060
- OSTI ID:
- 4131821
- Report Number(s):
- CONF-751125--72
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
*THERMONUCLEAR REACTOR WALLS- - SWELLING
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EROSION
FOILS
IRRADIATION
N70800* --Physics--Controlled Thermonuclear Research-- Thermonuclear Engineering & Equipment
SINTERING
VACUUM CASTING