Modification of hydriding properties of LaCo/sub 5/ by partial substitutions/sub 5-x/M/sub x/ with M = Al,Ga)

Journal Article · Thu Jul 15 00:00:00 EDT 1982 · J. Solid State Chem.; (United States)

DOI:https://doi.org/10.1016/0022-4596(82)90243-2· OSTI ID:6602507

Oesterreicher, H; Elton, J

By partial substitution of Co in LaCo/sub 5/ by nontransition metals such as Al, an increase in H capacity (z) vis-a-vis LaCo/sub 5/ is achieved at pressures on the order of 100 atm at room temperature. Lower equilibrium pressures, P/sub e/, have been previously observed when compounds such as PrCo/sub 5/ and LaNi/sub 5/ were partially substituted on transition metal sites by nontransition metals such as Al, Be. This fact, coupled with the existence of the high-pressure phase LaCo/sub 5/H/sub z/ with z approx. = 9, suggests that the increased z is due to a lowering of P/sub e/ of the high-pressure phase to more modest conditions in temperature and pressure. The actual P(z) curves are, however, complex and reflect phenomenology often observed with pseudobinaries.

• Research Organization: Univ. of California, San Diego, La Jolla
• OSTI ID: 6602507
• Journal Information: J. Solid State Chem.; (United States), Journal Name: J. Solid State Chem.; (United States) Vol. 43:3; ISSN JSSCB
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
080201 -- Hydrogen-- Chemisorption Storage
36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
ALLOYS
ALUMINIUM ALLOYS
ANNEALING
CHEMICAL PREPARATION
CHEMICAL REACTIONS
COBALT ALLOYS
COHERENT SCATTERING
DATA
DIFFRACTION
ELEMENTS
EXPERIMENTAL DATA
GALLIUM ALLOYS
HEAT TREATMENTS
HIGH TEMPERATURE
HYDRIDATION
HYDROGEN
INFORMATION
INTERMETALLIC COMPOUNDS
ISOTHERM
LANTHANUM ALLOYS
LOW PRESSURE
MEDIUM TEMPERATURE
MELTING
NONMETALS
NUMERICAL DATA
PHASE TRANSFORMATIONS
PRESSURE DEPENDENCE
RARE EARTH ALLOYS
SCATTERING
SYNTHESIS
TEMPERATURE DEPENDENCE
X-RAY DIFFRACTION