C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
75/33, 53/355
C22C 1/06 (2006.01) C22C 1/02 (2006.01)
Patent
CA 1243491
ABSTRACT The invention relates to a method of manufacturing a hydrogen-storing alloy based on the Laves phases AB2, where A is titanium and/or zirconium, and B is one or more elements from the remainder of the transition metal series, wherewith the ratio of the atomic radii of A and B, rA/rB, is between 1.05 and 1.68. This is run by melting in vacuum or under a protective gas. In order to achieve maximal hydrogen storing capacity, it is provided according to the invention: that the melting is carried out in a heating apparatus with a vessel lined with calcium oxide: further, that in a first step a partial alloy is produced comprising the selected elements with the exception of titanium, zirconium, and cerium; that in a second step the partial alloy is deoxidized with titanium and/or zirconium added in an amount of ca. 0.1-0.2 wt.% (of the weight of the entire melt); that in a third step, following a holding time (at temperature) of at least 10 min, the remainder of the prescribed amount of the titanium and/or zirconium is added to the melt; and that the melt is thereafter abruptly cooled.
489097
Fetherstonhaugh & Co.
Mannesmann Aktiengesellschaft
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