静高压对Mn4Si合金液-固转变中间相形成的影响及准晶相的截获

Influence of High Pressure on Formation of Intermediate Phases of Mn4Si and Formation of Dodacagonal Quasicrystal in Mn4Si Alloy under High Static Pressure

1.
Physics Dfepartment of Jilin University, Changchun 130023, China;
2.
International Center for Materials Physics, Academia Sinica, Shenyang 110015, China;
3.
Center for Condensed and radiation Physics, CCAST (World Laboratory), Beijing 100080, China

摘要: 利用静高压熔态淬火方法对Mn4Si合金液-固非平衡转变过程进行了研究。发现真空熔炼的合金中常见的（Mn4Si）相在高压下是不稳定的。而真空熔炼合金中没有的（Mn6Si）R相在高压液-固转变过程中出现了。首次在4.5 GPa压力下通过熔态淬火截获到了十二次准晶相。使用透射电子衍射技术对其进行了鉴别；使用X射线衍射对各晶体相和准晶相的结构和稳定性进行了研究。
- Mn4Si /
- 静高压 /
- 熔态淬火 /
- 十二重准晶态 /
- 中间相 /
- 稳定性
Abstract: The formation and stability of the intermediate phases of Mn4Si have been investigated by the method of quenching in fusing state under high static pressure (MQFSHP). The results show that (Mn4Si) phase , which is the main part in the Mn4Si alloy smelted in vacuum furnace is unstable; (Mn4Si) R phase, which is not in the Mn4Si alloy smelted in vacuum, is observed by quenching from fusing state under high pressure. The dodecagonal quasicrystal has been found in Mn4Si system by MQFSHP for the first time. The structure and stability of intermediate phases and dodecagonal quasicrystal were analyzed by using X-ray diffraction, electron diffraction and DTA techniques.
- Mn4Si /
- high static pressure /
- quenching in fusing state /
- dodecagonal quasicrystal /
- intermediate phase /
- stability