METALLIC GLASS ALLOY

摘要

A metallic glass alloy for a separator which has a chemical composition in atomic % represented by an empirical formula: Cu100-a-bZraAlb [wherein 30 <= a <= 60 and 0 <= b <= 15]; and the metallic glass alloy wherein a part of the above Zr or the above Al is replaced by Nb and/or Ta (10 atomic % or less of each element). The above metallic glass alloy can be produced at a relatively low cost, and is excellent in corrosion resistance, formability, strength and electroconductivity, in particular, is excellent in corrosion resistance being required of a material for a separator. The metallic class alloy has theoretically no crystal grain boundary from which oxidation reaction starts and therefore can be inhibited in the occurrence of corrosion. The alloy also exhibits the strength and electroconductivity being superior to those of a conventional carbon-based material. Further, a separator using the above alloy can be produced by a process reduced in the number of steps, as compared to the case of a separator using a carbon-based material, which results in the suppression of the production cost of a separator.