Diffusion properties and phase transitions of the metallic glass a-Zr/sub 2/-PdH/sub x/

Conference · Sat Jan 01 04:00:00 EST 1983

OSTI ID:5752019

Bowman, Jr, R C; Cantrell, J S; Attalla, A; Etter, D E; Craft, B D; Wagner, J E; Johnson, W L

NMR measurements were made to deduce hydrogen diffusion parameters in amorphous a-Zr/sub 2/PdH/sub 2/ /sub 9/. Non-Arrhenius temperature dependence as well as enhanced hydrogen mobility was found for glassy a-r/sub 2/PdH/sub 2/ /sub 9/ in contrast to the Arrhenius behavior in two crystalline c-Zr/sub 2/PdH/sub 2/ /sub 90/ phases. Differential scanning calorimetry and x-ray diffraction indicate that both the initial a-Zr/sub 2/Pd alloy and the amorphous hydride undergo irreversible transformations at elevated temperatures. Although a-Zr/sub 2/Pd forms the crystalline intermetallic, a-Zr/sub 2/PdH/sub 2/ /sub 9/ can generate either crystalline Zr/sub 2/PdH/sub x/ or ZrH/sub x/ as the major decomposition product.

• Research Organization: Monsanto Research Corp., Miamisburg, OH (USA). Mound; Miami Univ., Oxford, OH (USA). Dept. of Chemistry; California Inst. of Tech., Pasadena (USA). W.M. Keck Lab. of Engineering Materials
• DOE Contract Number: AC04-76DP00053
• OSTI ID: 5752019
• Report Number(s): MLM-3081(OP); CONF-830888-6; ON: DE83016626
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ATOM TRANSPORT
CALORIMETRY
COHERENT SCATTERING
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
CRYSTALLIZATION
DIFFRACTION
DIFFUSION
ELEMENTS
HYDRIDES
HYDROGEN
HYDROGEN COMPOUNDS
METALLIC GLASSES
NEUTRAL-PARTICLE TRANSPORT
NONMETALS
PALLADIUM COMPOUNDS
PALLADIUM HYDRIDES
PHASE TRANSFORMATIONS
RADIATION TRANSPORT
SCATTERING
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION
ZIRCONIUM COMPOUNDS
ZIRCONIUM HYDRIDES