Diffusion of protium and deuterium in the. cap alpha. and. beta. phases of LaNi/sub 5/

Journal Article · Tue Dec 31 23:00:00 EST 1985 · Inorg. Mater. (Engl. Transl.); (United States)

OSTI ID:5645509

Ptashnik, V B; Baikov, Y M; Dunaeva, T Y; Stepanov, Y P

This paper studies the diffusion of the low concentrations of interstitial hydrogen atoms in the a-phase of LaNi/sub 5/ and of the considerably higher concentrations of these atoms in the b-phase. Temperature dependences were obtained for the protium and deuterium diffusion coefficients in both phases. A generalized kinetic equation was derived for the determination of the coefficients for diffusion in the b-phase and for the reaction on the boundary surface on the a- and b-phases. The parameters of the Arrhenius equation which describes the diffusion process depend on the occupancy of the interstices. The diffusion isotope data are in accord with the proposed mechanism.

• Research Organization: A.F. Ioffe Physicotechnical Institute
• OSTI ID: 5645509
• Journal Information: Inorg. Mater. (Engl. Transl.); (United States), Journal Name: Inorg. Mater. (Engl. Transl.); (United States) Vol. 21:8; ISSN INOMA
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
080201* -- Hydrogen-- Chemisorption Storage
36 MATERIALS SCIENCE
360104 -- Metals & Alloys-- Physical Properties
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400202 -- Isotope Effects
Isotope Exchange
& Isotope Separation
ALLOYS
ARRHENIUS EQUATION
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISORPTION
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DEUTERIUM
DIFFUSION
EQUATIONS
HYDRIDATION
HYDRIDES
HYDROGEN 1
HYDROGEN COMPOUNDS
HYDROGEN ISOTOPES
INTERMETALLIC COMPOUNDS
INTERSTITIALS
ISOTOPE EFFECTS
ISOTOPES
KINETICS
LANTHANUM ALLOYS
LANTHANUM COMPOUNDS
LANTHANUM HYDRIDES
LIGHT NUCLEI
MATHEMATICAL MODELS
NICKEL ALLOYS
NICKEL COMPOUNDS
NICKEL HYDRIDES
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
PHASE STUDIES
POINT DEFECTS
RARE EARTH ALLOYS
RARE EARTH COMPOUNDS
REACTION KINETICS
SEPARATION PROCESSES
SORPTION
STABLE ISOTOPES
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS