通过不同退火路径获得相同的玻璃态  

Achieving identical glassy state through different thermal paths

作　　者：王家宁 宋丽建 高玉蓉 臧博闻 高萌 霍军涛 胡丽娜 王军强 Jianing Wang;Lijian Song;Yurong Gao;Bowen Zang;Meng Gao;Juntao Huo;Lina Hu;Jun-Qiang Wang(CAS Key Laboratory of Magnetic Materials and Devices,and Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials,Ministry of Education,Shandong University,Jinan 250061,China)

机构地区：[1]CAS Key Laboratory of Magnetic Materials and Devices,and Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China [2]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China [3]Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials,Ministry of Education,Shandong University,Jinan 250061,China

出　　处：《Science China Materials》2023年第9期3706-3712,共7页中国科学（材料科学（英文版）

基　　金：supported by the National Key R&D Program of China (2018YFA0703600);the National Natural Science Foundation of China (51922102, 52001319, 52271158, 92163108, and 52231006);Zhejiang Provincial Natural Science Foundation (LGF22E010002, LZ22A030001, and LR22E010004);the “Pioneer and Leading Goose” R&D Program of Zhejiang (2022C01023);Ningbo Key Scientific and Technological Project (2019B10051)。

摘　　要：本文以金基金属玻璃为模型,使用高精度闪速差示扫描量热法研究了等温退火和连续降温退火对焓弛豫和回复过程的影响.发现即使玻璃的能量(焓)一样,两种退火路径获得的玻璃的状态也可能不同.对于短时间等温退火或快速连续降温退火得到的高能量玻璃,两种退火路径获得的玻璃状态明显不同:连续降温退火得到的玻璃的弛豫峰更窄,而等温退火得到的玻璃弛豫峰更宽.但是,对于长时间等温退火或慢速连续降温退火得到的低能量玻璃,两种退火路径获得的玻璃状态趋于相同,即弛豫峰完全重合.弛豫动力学结果表明,高能量玻璃处在β弛豫阶段,具有热历史依赖性.而低能量玻璃处在α弛豫阶段,玻璃状态与热历史无关,这主要是因为α弛豫具有较强的协同性,具有各态遍历特征,使结构均一化.这些发现对精准调控玻璃性质具有重要意义.The enthalpy relaxation and recovery processes of an Au-based metallic glass model were studied using highprecision nanocalorimetry.The glassy states after isothermal and isochronal annealing were compared,and it was revealed that the relaxation peaks for slightly and isochronally annealed glasses were narrower compared with slightly and isothermally annealed glasses,although they have the same enthalpy.This reveals a typical thermal history-dependent behavior.Interestingly,when the glasses were heavily annealed,the relaxation peaks of both isothermally and isochronally annealed glasses became identical,denoting no relation to thermal histories.Further relaxation kinetics studies revealed that dependence on thermal paths occurred in theβ-relaxation stage,while the glassy states became identical when theα-relaxation stage was reached regardless of the thermal paths.This is attributed to the ergodic characteristic of cooperative atomic motions during theαrelaxation.The difference betweenβandαrelaxations in dependence on annealing paths is helpful for precisely controlling the glass properties.

关 键 词：等温退火 金属玻璃 差示扫描量热法 玻璃态 弛豫峰 均一化 协同性 焓弛豫 

分 类 号：TG139.8[一般工业技术—材料科学与工程]