Patent ID: 7175721
Filing Date: 2007-02-13
Classification: B22F,C01B,C22C,H01M,Y02E

Abstract:
1. A method for producing a Cr—Ti—V hydrogen storage alloy utilizing thermit process, metal elements in said Cr—Ti—V hydrogen storage alloy consisting essentially of Cr, V, Al, Ti and a rare earth metal selected from the group consisting of La, Ce, and misch metal, and said alloy having a body-centered cubic (BCC) crystal structure, said method comprising: material preparation step (A) of providing an alloy material ( material introduction step (B) of placing said alloy materials in a crucible for thermit reduction so that the alloy material ( metal melting step (C) of igniting the alloy material ( step (D) of making said alloy melt obtained in step (C) into an alloy; and step (E) of melting said alloy obtained in step (D) with a rare earth metal selected from the group consisting of La, Ce, and misch metal in an amount of not less than 0.2 at % of said alloy to obtain an alloy melt, deoxidizing said alloy melt to lower its oxygen content to not higher than 0.1 wt %, and cooling and solidifying said deoxidized alloy melt to obtain a Cr—Ti—V hydrogen storage alloy.