期刊文献+

非晶态(Ni_(80)P_(20))合金的玻璃转变和过冷液体性质 被引量:1

Revealing Glass Transition and Supercooled Liquid in (Ni_(80)P_(20)) Metallic Glass
原文传递
导出
摘要 镍磷(Ni_(80)P_(20))金属玻璃是最典型和被研究最多的金属玻璃成分之一。然而,由于镍磷金属玻璃在加热过程中玻璃转变过程被晶化所阻断,到目前为止其过冷液体性质还没有被探测和表征。本工作通过具有高升温速率的超快量热仪,避免了(Ni_(80)P_(20))金属玻璃在玻璃转变过程中的晶化,直接探测其整个玻璃转变过程和一定温度宽度的过冷液相区,为揭示其超冷液体性质提供了可能。通过超快量热测量,获得了(Ni_(80)P_(20))金属玻璃在5个数量级升温速率变化下的相形成规律和液体脆度,它的超冷液体展现出比大部分块体金属玻璃更"脆"的一种液体行为,这种"脆"性液体行为可能导致其差的玻璃形成能力。 Nickel-phosphorus metallic glass(MG) is one of the most typical MGs, and is also one of the most popular studied MG components, especially in the process of establishing the structure model of amorphous alloys and computer simulations. Although it appears throughout the history of amorphous alloy research, its glass transition temperature and liquid properties have not yet been determined due to its low ability to form glass. In this work, we bypassed the crystallization of (Ni_(80)P_(20)) MG during the glass transition process by an ultrafast calorimeter with heating rates up to thousands of Kelvin per second and directly detected its glass transition process. This method offers an opportunity to expose the nature of the (Ni_(80)P_(20)) MG supercooled liquid. The liquid fragility of the metallic glass Ni80P20 was determined by the Vogel-Fulcher-Tammann equation based on the dependence of the glass transition temperature at different heating rates. The results show that the liquid fragility of (Ni_(80)P_(20)) MG is 93 ± 4, which is obviously a very"fragile"liquid compared with other bulk MGs. It is suggested that this"fragile"liquid behavior of (Ni_(80)P_(20)) MG may lead to its low glass-forming ability.
作者 杨群 彭思旭 卜庆周 于海滨 YANG Qun;PENG Sixu;BU Qingzhou;YU Haibin(Wuhan National High Magnetic Field Center and School of Physics,Huazhong University of Science and Technology,Wuhan 430074,China;School of Chemistry and Chemical Engineering,Hubei University,Wuhan 430062,China)
出处 《金属学报》 SCIE EI CAS CSCD 北大核心 2021年第4期553-558,共6页 Acta Metallurgica Sinica
基金 中央高校基本科研业务费专项资金项目No.2018KFYXKJC009。
关键词 金属玻璃 超快量热 超冷液体 脆度 玻璃形成能力 metallic glass ultrafast scanning calorimetry supercooled liquid fragility glass forming ability
  • 相关文献

参考文献5

二级参考文献10

共引文献428

同被引文献3

引证文献1

二级引证文献1

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部