Unveiling the time-temperature dependence of metastability of supercooled liquid using nano-calorimetry  

作　　者：Yijun Ding Lijian Song Zheng Wang Ruiqi Yu Junqiang Wang Lina Hu Yuanzheng Yue Edgar D.Zanotto 

机构地区：[1]Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education),Shandong University Jinan 250061,China [2]Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China [3]Key Laboratory of Experimental Teratology Shandong University Jinan 250061,China [4]Department of Chemistry and Bioscience,Aalborg University,Aalborg 9220,Denmark [5]Department of Materials Engineering,Federal University of Sao Carlos,Sao Carlos SP 13.565-905,Brazil

出　　处：《Science China(Physics,Mechanics & Astronomy)》2024年第3期119-127,共9页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the Songshan Lake Materials Laboratory (Grant No. 2021SLABFN05);the National Natural Science Foundation of China (Grant Nos. 51971120, 51901139);the Taishan Scholars Program of Shandong Province (Grant No. tsqn201909010);the Key Basic and Applied Research Program of Guangdong Province(Grant No. 2019B030302010);the Sao Paulo Research Foundation–FAPESP (Grant No.#2013/07793-6)。

摘　　要：There is a lack of understanding of both the conversion of an unstable glass into a metastable supercooled liquid(MSL) upon heating and the metastability of MSLs. In this study, we investigated the time-and temperature-dependent metastability of an MSL using an advanced nano-calorimetric technique. The chosen Au-based metallic glass(Au MG) allowed adequate probing of its MSL in a temperature range between 10 and 70 K above the standard glass transition temperature. We found that the survival time of the MSL state is a quadratic function of temperature. Beyond this duration threshold, the sample undergoes fast crystallization even if it is below the crystallization temperature that is measured using differential scanning calorimetry.Employing transmission electron microscopy, we observed the formation of clusters with a partially ordered lattice structure during relaxation in the Au MG sample fabricated using a nano-calorimeter. The atomic ordering within the clusters was enhanced by increasing time and temperature in the MSL region. Once the as-produced glass entered the MSL stage upon heating followed by a quenching stage at a given rate, the mechanical properties of the quenched glass remained the same regardless of its holding temperature and duration within the MSL region. This work provides insights into the glass-MSL-crystal transformation and offers guidance for designing standard metallic glasses for property characterizations.

关 键 词：metallic glass supercooled liquid RELAXATION NUCLEATION nano calorimetric technology 

分 类 号：TG139.8[一般工业技术—材料科学与工程]