Alloys or metallic compositions – Manganese base
Patent
1985-08-21
1987-04-28
Brody, Christopher W.
Alloys or metallic compositions
Manganese base
420590, 420900, C22C 106, C22C 2200
Patent
active
046613170
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.
REFERENCES:
patent: 2926981 (1960-03-01), Stout
patent: 4079523 (1978-03-01), Sandrock
Sandrock et al, "Metallurgical Considerations in the Production and Use of FeT. Alloys for Hydrogen Storage", Proc 11th Intersociety Energy Conversion, Engineering Conference AICHE 965 (1976).
Making Shaping & Treating of Steel, 9th ed., pp. 591-592 .COPYRGT.1983.
Brody Christopher W.
Mannesmann Aktiengesellschaft
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