Hydrogen-absorbing alloy and process for preparing the same
Patent 6153032 Issued on November 28, 2000. Estimated Expiration Date: 
May 14, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 14, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesRoom temperature reaction of vanadium-based alloys with hydrogen Patent #: 4440737 InventorsAssigneeApplicationNo. 269880 filed on 05/14/1999US Classes:148/669, Titanium(Ti) or titanium base alloy148/421, Titanium, zirconium, or hafnium base420/421, Chromium or molybdenum containing420/424, VANADIUM BASE420/428, CHROMIUM BASE420/900HYDROGEN STORAGEExaminersPrimary: Wyszomierski, GeorgeAssistant: Morillo, Janelle Combs Attorney, Agent or FirmForeign Patent References
International ClassesC01B 006/24C22C 014/00 C22C 027/02 C22C 027/06 C22C 001/18 Foreign Application Priority Data1996-10-03 JPAbstractA hydrogen-absorbing alloy capable of controlling the very fine structure formed by a spinodal decomposition for improving flatness of an emission equilibrium pressure in a practical temperature/pressure range and excellent in activation and hydrogen absorption/desorption amounts, and a production method thereof. The hydrogen-absorbing alloy has a composition expressed by the general formula Tix Cry Vz (where each of x, y and z represents an atomic percent and satisfies the relation x+y+z=100), wherein the composition has a body-centered cubic structural phase as a principal phase, the principal phase exists within the range in which the body-centered cubic structure appears and a spinodal decomposition occurs with the exception of a C14 (a typical structure of the Laves phase; a MgZn2 type crystal structure) mono-phase range, and has a regular periodical structure formed by the spinodal decomposition, and its apparent lattice constant is at least 0.2950 nm but is not greater than 0.3060 nm. The production method of the hydrogen-absorbing alloy comprises conducting a solution heat-treatment at 700 to 1,500° C. for one minute to 100 hours, and a cooling treatment and/or an aging treatment at 350 to 1,200° C. for one minute to 200 hours.Other References
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