Phase transitions in the Nb-D(H) system: Superlattice reflections near the '-US phase transition

Journal Article · Sat Feb 01 00:00:00 EST 1986 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.33.1732· OSTI ID:6198035

Chasnov, R; Birnbaum, H K; Shapiro, S M

An experimental study of NbD/sub x/(H/sub x/) alloys (0.70 < x < 0.85) in the vicinity of the '-US phase transition was conducted using x-ray and elastic neutron scattering techniques in the temperature range 300 < T < 473 K. ''Superlattice'' reflections between the Bragg peaks of the bcc ' phase were observed for both x-ray and neutron scattering but there were significant differences between observations carried out with the two types of radiation. The temperature dependence of these weak reflections was determined in the ' phase. These superlattice reflections were interpreted as being due to periodic modulations of the metal lattice caused by the partial ordering of deuterium atoms in the ' phase.

• Research Organization: Department of Metallurgy and Mining Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
• DOE Contract Number: AC02-76ER01198; AC02-76CH00016
• OSTI ID: 6198035
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Vol. 33:3
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
NIOBIUM HYDRIDES
NEUTRON DIFFRACTION
PHASE TRANSFORMATIONS
X-RAY DIFFRACTION
BCC LATTICES
DENSITY
DEUTERIUM COMPOUNDS
ELASTIC SCATTERING
FLUCTUATIONS
HIGH TEMPERATURE
HYDROGEN COMPOUNDS
MEDIUM TEMPERATURE
MONOCRYSTALS
ORTHORHOMBIC LATTICES
SUPERLATTICES
TEMPERATURE DEPENDENCE
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALS
CUBIC LATTICES
DIFFRACTION
HYDRIDES
NIOBIUM COMPOUNDS
PHYSICAL PROPERTIES
REFRACTORY METAL COMPOUNDS
SCATTERING
TRANSITION ELEMENT COMPOUNDS
VARIATIONS
360204* - Ceramics
Cermets
&amp; Refractories- Physical Properties