A Study on the Formation of Quasi-Crystal Al80Mn14Si6 under High Static Pressure

By using the method of quenching in fusing state under high static pressure (MQFSHP), the samples of Al80Mn14Si6 alloy rapidly quenched were gained under pressure of 2.8 and 3.1 GPa respectively. The quenched samples were examined by X-ray diffraction and electron diffraction. Results show that they contain icosahedra phase, non-crystal, intermediate metastable phase. After the quenched samples were heated to 350 ℃ maintained for 1 h, there occurred no detectable crystallization of Ⅰ-phase in them, but for the case of 500 ℃/h, the samples crystallized completely into a stable -Al73Si10Mn17. In this paper, the applicability of MQFSHP to the quasi-crystal formation has also been discussed.