A Study on the Formation and the Stability of Al6Mn Quasicrystal under High Static Pressure

In this paper, a new method of quenching at fuse state (1 300 ℃) under high static pressure (4.5 GPa) hase been set up to prepare the quasicrystal icosahedral phase of the Al6Mn alloy, the crystallization temperature of which is close to the one of rapid cooling ribbon sample, and the cooling rate during the quenching is of about 102 ℃/s. A new intermediate metastable phase (a T-phase-like) occures during the crystallization process of Ⅰ-phase under high static pressure (2.5 GPa) for the rapid cooling ribbon of Al6Mn. The high static pressure increases its crystallization temperature and enhances the stability of the intermediate metastable phase.