The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 28, 1987
Filed:
Aug. 21, 1985
Friedrich Bardenheuer, Krefeld, DE;
Mannesmann Aktiengesellschaft, Duesseldorf, DE;
Abstract
The invention relates to a method of manufacturing a hydrogen-storing alloy based on the Laves phases AB.sub.2, 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, r.sub.A /r.sub.B, is between 1.05 and 1.68. This is run by melting in vacuum or under a protective gas. In order to achieve 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 an oxide or oxides of one or more metals having a strong affinity for oxygen; further, that in a first step a partial alloy is produced comprising the selected elements with the exception of titanium, zirconium, and cerium, if cerium is to be an alloy element; that in a second step the partial alloy is deoxidized with titanium and/or zirconium and/or aluminum added in an amount that corresponds to the quantity of oxygen introduced with the alloy elements, and after, in a rest period, the oxide particles created by the deoxidation are deposited as completely as possible in the slag; that in a third step, the remainder of the prescribed amount of the titanium and/or zirconium is added to the melt; and, cerium, if it is to be used, is added only after deoxidation, and then the melt is abruptly cooled.