Process for producing vanadium alloy foil

• Main Authors: KAJITA OSAMU, TAKAGI AKIRA, NISHIDA MOTONORI, OHNISHI TOSHIKI
• Format: Patent
• Language: English
• Published: 01.07.2003
• Edition: 7
• Subjects: ALLOYS; BASIC ELECTRIC ELEMENTS; CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; CHEMISTRY; ELECTRICITY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; POWDER METALLURGY; PRETREATMENT OF RAW MATERIALS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; PRODUCTION AND REFINING OF METALS; SEPARATION; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention provides a process for producing vanadium alloy foil suitable as a membrane in a hydrogen-refining unit. A vanadium alloy comprising 5 to 25% by weight of at least one selected from the group consisting of Ni, Co, Mo, Fe and Ag, 0.01 to 5% by weight of at least one selected from the group consisting of Ti, Zr and Y, and the balance being V is used. A melt of the vanadium alloy is prepared by use of a crucible 1 having slit 3 in the bottom, a roll 2 comprising a cylinder whose central axis is arranged to be parallel to the slit is rotated, the melt is jetted from the slit 3 to the roll surface 5, the melt is jetted from the slit 3 is rapidly cooled, and the vanadium alloy solidified on the roll surface 5 is continuously exfolitated from the roll surface 5 to obtain the foil.