Effects of Al Addition on Structures and Protium Absorption-Desorption Properties of Ti-Cr Alloys

Abstract

The effects of Al addition on structures and protium absorption-desorption properties of Ti–Cr alloys were investigated. It was found that 1 at% Al addition is effective for improvement of protium storage capacity. The BCC phase increases with increasing Al content in Ti–Cr–Al alloys. It is generally well known that plateau pressure of the protium storage alloys, e.g. Ti–Cr-V and Ti–Fe–V alloys, increases with decreasing lattice constants, however, the plateau pressure of the Ti–Cr–Al alloys increases with increasing lattice constants, namely increasing Al content.