摘要
铁基金属玻璃粒子因其特有的性能在微成型领域有着良好的应用前景,本研究利用脉冲微孔喷射法制备粒径可控的单分散Fe_(60)Ni_(7.5)Mo_(7.5)P_(10)C_(10)B_5金属玻璃粒子。通过OM,SEM,XRD及DSC等手段对得到的粒子进行检测。结果表明:该方法制备的金属玻璃粒子具有粒径均一、球形度高、热历史一致的优点。随着粒径的增加,粒子的微观结构从完全非晶相向晶体相转变。在本实验条件下,Ar气氛下制备得到完全非晶相的粒子粒径应小于285μm,而在He气氛得到的最大粒径为383μm粒子也依旧保持完全非晶相。通过理论模型对冷却速率进行计算,得到其临界冷却速率应大于1300K/s。
Fe-based metallic glass particle has an excellent application prospect in micro-forming field due to their special properties.Mono-sized Fe 60 Ni 7.5 Mo 7.5 P 10 C 10 B 5 metallic glass particles with controllable particle diameters were prepared by pulsated orifice ejection method(POEM).The analysis of these obtained particles was carried out by optical microscope(OM),scanning electron microscope(SEM),X-ray diffraction(XRD),differential scanning calorimetry(DSC).The results show that the metallic glass particles prepared by POEM have the advantages of uniform particle diameter,high sphericity and consistent thermal history.The microstructure of particles is transformed from fully amorphous phase to crystal phase with increasing particle diameters.In the experimental conditions of this paper,the critical diameter for obtaining fully amorphous phase should be less than 285μm in Ar atmosphere.However,the particle with the maximum diameter of 383μm in He atmosphere also maintain amorphous phase.The critical cooling rate calculated by the theoretical model should be over 1300K/s.
作者
董伟
李文畅
许富民
韩阳
张伟
DONG Wei;LI Wen-chang;XU Fu-min;HAN Yang;ZHANG Wei(School of Materials Science and Engineering,Dalian University of Technology,Dalian 116024,Liaoning,China)
出处
《材料工程》
EI
CAS
CSCD
北大核心
2018年第10期30-36,共7页
Journal of Materials Engineering
基金
辽宁省自然科学基金(201602150)
中央高校基本科研业务费专项资金(DUT15ZD239)
国家自然科学基金项目(51571050)
关键词
脉冲微孔喷射法
铁基金属玻璃
单分散粒子
冷却速率
pulsated orifice ejection method
Fe-based metallic glass
mono-sized particle
cooling rate
作者简介
通讯作者:董伟(1965-),男,副教授,博士生导师,现从事单分散微米级粒子制备与液滴沉积成型方向的研究,联系地址:辽宁省大连市甘井子区凌工路2号大连理工大学新三束实验室208(116024),E-mail:w-dong@dlut.edu.cn。
