Dynamical evidence for a change in hydrogen-diffusion behavior in transition-metal hydrides at high temperatures

Journal Article · Thu Jan 15 04:00:00 EST 1987 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.35.890· OSTI ID:6815271

Barnes, R G; Jerosch-Herold, M; Shinar, J; Borsa, F; Torgeson, D R; Peterson, D T; Lucas, A J; Styles, G A; Seymour, E F.W.

The /sup 45/Sc nuclear spin-lattice relaxation time T/sub 1/ in scandium dihydride and dideuteride measured up to 1300 K shows a second high-temperature minimum at --1100 K, in addition to the usual (Bloemberger-Purcell-Pound) minimum associated with independent motion of hydrogen vacancies among tetrahedral interstitial sites. This indicates the onset of a second mode of hydrogen motion with a relatively long associated correlation time for the hydrogen-scandium interaction. Possible origins for such long times are discussed.

• Research Organization: Ames Laboratory, Iowa State University, Ames, Iowa 50011
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 6815271
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 35:2; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ATOM TRANSPORT
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DEUTERIDES
DEUTERIUM COMPOUNDS
DIFFUSION
ELEMENTS
HIGH TEMPERATURE
HYDRIDES
HYDROGEN
HYDROGEN COMPOUNDS
INTERMEDIATE MASS NUCLEI
INTERSTITIALS
ISOTOPES
NEUTRAL-PARTICLE TRANSPORT
NONMETALS
NUCLEI
ODD-EVEN NUCLEI
POINT DEFECTS
RADIATION TRANSPORT
RELAXATION
RELAXATION TIME
SCANDIUM 45
SCANDIUM COMPOUNDS
SCANDIUM HYDRIDES
SCANDIUM ISOTOPES
SPIN-LATTICE RELAXATION
STABLE ISOTOPES
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
VACANCIES
VERY HIGH TEMPERATURE