2002 Volume 43 Issue 3 Pages 421-423
Structures of as-cast and homogenized Ti75−xAl25Nix alloys before and after hydrogenation, the hydrogen content and the hydrogen desorption temperature of the hydrogenated Ti75−xAl25Nix alloys were investigated by a powder X-ray diffractometer (XRD) and a hydrogen analyzer. The hydrogen content of these alloys decreased with increasing Ni content, and was almost independent of the hydrogenation temperature and the structure of the alloys, but 50% hydrogen desorption temperature, Td, varied widely with them. The formation of amorphous phases raised Td. On the contrary, a drop in Td was achieved by hydrogenation of a mixture alloy of the D019 and C14 Laves phases.