Composition-dependent hydrogen motion in a random alloy, V/sub x/Nb/sub 1-x/H/sub 0. 2/: From localized motion at V atoms to long-range hydrogen diffusion

Journal Article · Mon Dec 23 00:00:00 EST 1985 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.55.2895· OSTI ID:6268849

Lichty, L; Shinar, J; Barnes, R G; Torgeson, D R; Peterson, D T

Proton spin-lattice relaxation times (T/sub 1/) measured for the first time across a random transition-metal alloy system, V/sub x/Nb/sub 1-x/H/sub 0.2/, from 100 to 700 K reveal (a) a suppression of hydride phase precipitation at low temperatures accompanied by enhanced retention of hydrogen in the solid-solution (..cap alpha..) phase compared to pure V or Nb, (b) hydrogen motion in the ..cap alpha.. phase at intermediate compositions governed by a distribution of activation energies, and (c) a transition to short, almost temperature-independent, T/sub 1/ behavior in ..cap alpha..-V/sub 0.1/Nb/sub 0.9/N/sub 0.2/ consistent with localized hydrogen motion around attracting V atoms.

• Research Organization: Ames Laboratory, United States Department of Energy and Departments of Physics and Materials Science and Engineering, Iowa State University, Ames, Iowa 50011
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 6268849
• Journal Information: Phys. Rev. Lett.; (United States), Vol. 55:26
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
HYDROGEN
DIFFUSION
NIOBIUM ALLOYS
HYDROGENATION
VANADIUM ALLOYS
ACTIVATION ENERGY
CHEMICAL COMPOSITION
DYNAMICS
ELECTRON SPIN RESONANCE
HIGH TEMPERATURE
INHIBITION
LOW TEMPERATURE
MEDIUM TEMPERATURE
RANDOMNESS
SOLID SOLUTIONS
SPIN-LATTICE RELAXATION
TEMPERATURE DEPENDENCE
ALLOYS
CHEMICAL REACTIONS
DISPERSIONS
ELEMENTS
ENERGY
MAGNETIC RESONANCE
MECHANICS
MIXTURES
NONMETALS
RELAXATION
RESONANCE
SOLUTIONS
360104* - Metals & Alloys- Physical Properties