Hydrogen permeation into iron

Journal Article · Mon May 15 00:00:00 EDT 1989 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.343328· OSTI ID:6479553

Wampler, W R

The permeation of deuterium (D) from the gas phase into solution in iron has been measured using a new method based on ion beam analysis. For bare metal surfaces the D uptake was observed to be limited by matrix diffusion through the bulk. The influence of chemisorbed oxygen on the D uptake rate was examined in detail. Submonolayer coverages of oxygen caused the D uptake to become surface-limited and reduced the D uptake rate by orders of magnitude. The temperature dependence of the surface-limited uptake rate suggests that a molecular precursor state may be involved in the D uptake for oxygen covered surfaces. The evidence indicates that chemisorbed oxygen reduces the D uptake and release rates by blocking sites where D can be chemisorbed on the surface.

• Research Organization: Sandia National Laboratories, Albuquerque, New Mexico 87185-5800
• OSTI ID: 6479553
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 65:10; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ATOM TRANSPORT
CHEMICAL REACTIONS
CHEMISORPTION
DEUTERIUM
DIFFUSION
ELEMENTS
HYDROGEN ISOTOPES
IRON
ISOTOPES
LIGHT NUCLEI
METALS
NEUTRAL-PARTICLE TRANSPORT
NONMETALS
NUCLEI
ODD-ODD NUCLEI
OXYGEN
RADIATION TRANSPORT
SEPARATION PROCESSES
SORPTION
STABLE ISOTOPES
TEMPERATURE DEPENDENCE
TRANSITION ELEMENTS
ULTRAHIGH VACUUM