| 摘要 |
PURPOSE: A hydrogen absorbing alloy and process for preparing the same is provided to provide an epochal high-capacity alloy, capable of being used effectively as an energy carrier, by optimizing chemical components of a Ti-Cr-V alloy system and its heat-treatment from the following aspects in order to improve flatness of an equilibrium pressure of a hydrogen-absorbing alloy in a practical temperature and pressure range. CONSTITUTION: A hydrogen-absorbing alloy has a composition expressed by the general formula TixCryVz (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.
|
