Abstract
The hydrogen absorption characteristics of TiMn 1.25Cr 0.25 alloy were studied by means of X-ray photoelectron spectroscopy, X-ray diffraction and oxygen poisoning. The capacity for hydrogen absorption is increased and the slope of the plateau is decreased effectively by annealing the alloy at 1000–1200°C. Enrichment of manganese in the surface layer (approximately 100 ) of the alloy appears to give good hydrogen absorption activity and improved resistivity to oxygen poisoning. The capability for hydrogen absorption of the poisoned alloy can be restored by treatment at 300°C with 10 atm H 2.
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