Trapping and surface permeation of deuterium in helium-implanted stainless steel
Austenitic stainless steel was ion implanted with deuterium (D) and H and then heated, with the depth distribution of D being monitored via the nuclear reaction /sup 2/D(/sup 3/He,p)/sup 4/He. Analysis using diffusion theory indicated that D is bound to He-associated traps with an enthalpy of 0.42 +- 0.08 eV referenced to a solution site. The trapping entities are belived to be approx. 1 nm He bubbles observed by transmission electron microscopy, with D being bound to the bubble walls by a mechanism similar to chemisorption. Irradiation-defect traps, probably vacancies, exhibited a strength of only 0.22 +- 0.08 eV. Trapping behavior was essentially the same for types 304 and 310 stainless steel, indicating little dependence upon the stability of the austenitic (fcc) phase. The rate of D release at the surface was determined in the temperature range 425 to 575/sup 0/K for two kinds of surface, one oxidized by electropolishing and air exposure, the other sputtered with Fe ions. Release was proportional to the square of solution concentration in both cases, but the recombination coefficient was > 100 times greater for the sputtered surface.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5322782
- Report Number(s):
- SAND-82-0013C; CONF-820545-6; ON: DE82014090; TRN: 82-013531
- Resource Relation:
- Conference: 5. international conference on plasma surface, Gatlinburg, TN, USA, 3 May 1982
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
STAINLESS STEEL-304
ION IMPLANTATION
PERMEABILITY
STAINLESS STEEL-310
AUSTENITIC STEELS
DEUTERIUM IONS
DIFFUSION
HYDROGEN IONS
TRAPPING
ALLOYS
CHARGED PARTICLES
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
IONS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
NICKEL ALLOYS
STAINLESS STEELS
STEELS
360104* - Metals & Alloys- Physical Properties