The intrinsic degradation phenomena of LaNi/sub 5/ and LaNi/sub 4. 7/Al/sub 0. 3/ by temperature induced hydrogen absorption-desorption cycling

Journal Article · Wed Apr 01 04:00:00 EST 1987 · Mater. Res. Bull.; (United States)

DOI:https://doi.org/10.1016/0025-5408(87)90255-8· OSTI ID:6420648

Park, J M; Lee, J Y

The effects of the thermal hydrogen absorption-desorption cycling on the intrinsic degradation of LaNi/sub 5/ and LaNi/sub 4.7/Al/sub 0.3/ were investigated through the P-C-T curve changes with cycles. LaNi/sub 5/ exhibits poor resistance for the thermal cycling (30/sup 0/C to 185/sup 0/C, P/sub H/2/sub / = 15 atm); however, LaNi/sub 4.7/Al/sub 0.3/ was found to have a good cyclic resistance (30/sup 0/C to 185/sup 0/C, P/sub H/2/sub / = 10 atm). The effect of annealing conditions for the recovery of LaNi/sub 5/ was found that the degree of recovery was dependent on annealing temperature and pressure. The degradation rate by thermal cycling after the recovery heat treatment was faster than that of fresh alloy.

• Research Organization: Dept. of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, P.O. Box 131, Cheongryang, Seoul
• OSTI ID: 6420648
• Journal Information: Mater. Res. Bull.; (United States), Journal Name: Mater. Res. Bull.; (United States) Vol. 22:4; ISSN MRBUA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101 -- Metals & Alloys-- Preparation & Fabrication
360105* -- Metals & Alloys-- Corrosion & Erosion
ADSORPTION
ALLOYS
ALUMINIUM ADDITIONS
ALUMINIUM ALLOYS
ANNEALING
CHEMICAL COMPOSITION
DESORPTION
ELEMENTS
EMBRITTLEMENT
HEAT TREATMENTS
HYDROGEN
HYDROGEN EMBRITTLEMENT
LANTHANUM ALLOYS
LANTHANUM BASE ALLOYS
NICKEL ALLOYS
NONMETALS
PERFORMANCE TESTING
PRESSURE DEPENDENCE
RARE EARTH ALLOYS
SORPTION
TEMPERATURE DEPENDENCE
TESTING
THERMAL DEGRADATION