Contribution to the Study of the Ti-Al Phase Diagram by Conventional and High Resolution Electron Microscopy

摘要

The study of long range order effects by electron diffraction and electron microscopy was carried out to help to establish the topology of the Ti-Al phase diagram. The stability and equilibrium of different compounds is discussed, including AlTi, Ti2Al, and Ti3Al5. Long period antiphase boundary structures are also examined for alloys containing 66% to 75% Al. It is shown that boundary structure distribution along the long-period axis is always uniform and that temperature dependence may correspond to a so-called devil staircase.