制备冷速对铁基非晶态合金性能的影响

The atomic arrangment has no long-range structural order in amorphous alloys,but it is generally believed that there is chemical and topological short-to-medium range order in these alloys. Amorphous alloy is metastable and its internal atomic arrangement state correlates closely with the preparation history, especially cooling rate in the preparation process. And then the properties of amorphous alloys depend on the internal atomic arrangement state. The work of this project will focus on Fe-based amorphous alloys. By means of various preparation techniques, Fe-based amorphous alloy specimens can be prepared under the different cooling rates. By comparing their properties, we can study on the influence of the cooling rate in the preparation process on the thermal stability, crystallization kinetics, mechanical properties and magnetic properties of Fe-based amorphous alloys, explore the influence of the cooling rate in the preparation process on the internal atomic arrangement state of Fe-based amorphous alloys, and thus clarify the relationship between the internal atomic arrangement state and properties in Fe-based amorphous alloys.

非晶态合金不具备长程原子有序，但普遍相信其原子排布存在短程到中程的有序。非晶态合金处于亚稳态，其微观原子排布状态与其制备历史，特别是制备冷速，密切相关。而非晶态合金的性能则取决于其原子排布状态。本项目将以Fe基非晶态合为研究对象，通过不同的制备技术来获得具有不同制备冷速的非晶态合金样品。通过性能对比，来研究制备冷速对Fe基非晶态合金热稳定性，结晶动力学，机械性能以及磁性能的影响，探讨制备冷速对获得的Fe基非晶态合金微观原子排布的影响，进而阐明Fe基非晶态合金中微观原子排布与其性能之间的关系。

非晶态合金不具备长程原子有序，但普遍相信其原子排布存在短程到中程的有序。非晶态合金处于亚稳态，其微观原子排布状态与其制备历史，特别是制备冷速，密切相关。而非晶态合金的性能则取决于其原子排布状态。本项目以Fe基非晶态合为研究对象，通过不同的制备技术来获得具有不同制备冷速的非晶态合金样品。通过性能对比，我们研究了制备冷速以及制备技术对Fe基非晶态合金的玻璃化形成能力，晶化动力学行为，热稳定性，驰豫行为，磁热性能以及机械性能的影响，基于此探讨制备冷速对Fe基非晶态合金微观原子排布的影响，进而阐明Fe基非晶态合金中微观原子排布与其性能之间的关系。研究结果表明，较慢的制备冷速将导致非晶态合金微观原子排布结构更加均匀致密，而这显著影响了非晶态合金各方面的性能，导致不同冷速下制备的非晶态合金在这些性能方面表现出一定的差异。