摘要
传统熔体快速凝固技术(如熔体旋淬法、铜模铸造法等)的非晶合金筛选方法存在效率低、成本高的问题.为克服该类局限,近年来以多靶共沉积技术为代表的非晶合金薄膜样品库高通量制备筛选方法的提出助力了非晶合金新材料的高效研发.然而,该类薄膜制备方法的样品冷却速率通常极高(约10^(8)K/s),会显著拓宽合金的玻璃形成范围,因此,该方法在高玻璃形成能力非晶合金(临界冷却速率≤10^(3)K/s)的筛选应用中存在一定局限.近期,母合金表面激光熔淬技术的提出为高玻璃形成能力非晶合金的高通量筛选提供了一种新选择.该方法的非晶合金制备历程与传统冷快速凝固方法类似,采用激光快速加热母合金表面并形成熔体,之后通过基底导走热量实现熔淬层的快速凝固(冷却速率约为10^(3)–10^(5)K/s),从而在高玻璃形成能力的母合金表面形成非晶态结构.与传统方法相比,该新范式在降低研发成本和简化检出流程方面具有显著的优势,可以提升高玻璃形成能力非晶合金的开发效率和准确性.
Traditional preparing and screening methods for metallic glasses based on rapid solidification techniques from melt,like melt spinning,copper mold casting,etc.,exhibited the problems of low efficiency and high cost.In recent years,highthroughput film preparation of alloy library based on multi-target co-deposition technique was provided successfully to accelerate the screening efficiency for the development of new metallic glasses.However,the main drawback of the highthroughput method is the extremely high cooling rate(~10^(8)K/s)during the formation of the film samples,compared with the traditional glass-forming condition of the aimed metallic glasses with high glass-forming ability(the normal critical cooling rate≤10^(3)K/s).Recently,the laser melting and quenching technique on the surface of master alloys was developed to offer a new choice for high-throughput screening of metallic glasses with high glass-forming ability.Comparable with the preparation processes using the traditional rapid-solidification methods,the preparation of metallic glasses using this laser method is as the following process:firstly rapidly melting the local surface of the master alloy using laser beam to form melt;then conducting heat away from the substrate to achieve rapid solidification of the melt with the cooling rate of 10^(3)-10^(5)K/s and remain the amorphous structure on the surface of the master alloys with high glass-forming ability.Compared with the traditional methods,this new paradigm using the laser melting and quenching technique has significant advantages in the reduction of research costs and simplification of the screening processes,which can improve high efficiency and accuracy of the development of metallic glasses with high glass-forming ability.
作者
赵恒博
刘晓斌
毕甲紫
巩旭菏
李然
张涛
ZHAO Hengbo;LIU Xiaobin;BI Jiazi;GONG Xuhe;LI Ran;ZHANG Tao(School of Materials Science and Engineering,Beihang University,Beijing 100191,China)
出处
《中国科学:物理学、力学、天文学》
北大核心
2025年第8期176-191,共16页
Scientia Sinica Physica,Mechanica & Astronomica
基金
国家自然科学基金(编号:52473227,52171150)
国家重点研发计划(编号:2018YFA0703601)资助项目。
关键词
非晶合金
玻璃形成能力
高通量实验
激光熔淬技术
metallic glasses
glass-forming ability
high-throughput experiment
laser melting and quenching technique
