Ultrasonic-assisted rapid cold welding of bulk metallic glasses  

超声辅助快速冷焊接块体金属玻璃

作　　者：Zhiyuan Huang Jianan Fu Xin Li Wenxin Wen Hongji Lin Yan Lou Feng Luo Zhenxuan Zhang Xiong Liang Jiang Ma 黄志远;傅佳男;李信;温文馨;林鸿基;娄燕;罗烽;张振轩;梁雄;马将(Shenzhen Key Laboratory of High Performance Nontraditional Manufacturing,College of Mechatronics and Control Engineering,Shenzhen University,Shenzhen 518060,China)

机构地区：[1]Shenzhen Key Laboratory of High Performance Nontraditional Manufacturing,College of Mechatronics and Control Engineering,Shenzhen University,Shenzhen 518060,China

出　　处：《Science China Materials》2022年第1期255-262,共8页中国科学（材料科学（英文版）

基　　金：supported by the Key Basic and Applied Research Program of Guangdong Province,China(2019B030302010);the National Natural Science Foundation of China(51871157,51971150 and 51775351);the Science and Technology Innovation Commission Shenzhen(JCYJ20170412111216258);the National Key Research and Development Program of China(2018YFA0703605);Shenzhen Basic Research Project(JCYJ20190808152409578).

摘　　要：Glass-forming ability is a long-standing concern in the field of metallic glasses(MGs),which greatly limits their maximum casting size and extensive applications.In this work,we report an ultrasonic-assisted rapid cold welding of bulk MGs without using any additives.MGs with various compositions are welded together under a 20,000-Hz highfrequency ultrasonic vibration without losing their amorphous nature.The ultrasonic technology offers the advantages of rapid bonding(<1 s)at low temperature(near room temperature)and low stress(<1 MPa).According to the phenomenon observed in the experiment,the activated fresh atoms diffuse through the broken channel port under continuous rupture of the oxide layer,and the ultrasonic vibration accelerates the atomic-diffusion process.Finally,stable bonding of the MG interface is realized.This universal ultrasonic-assisted welding process can realize the composition design of dissimilar MGs as well as tuning of new materials with new performance.玻璃形成能力是金属玻璃领域中长期存在的问题,它极大地限制了金属玻璃的最大铸造尺寸和广泛应用.在本研究中,我们报道了超声辅助快速冷焊接块体金属玻璃的方法.在不需要焊料的情况下,通过20,000赫兹的高频振动实现了不同组分金属玻璃的结合,并且保证了金属玻璃的非晶态特性.超声技术有低温低压快速焊接的优点,其中焊接温度接近室温,压强小于1 MPa,焊接时间小于1 s.根据观察到的现象,随着金属玻璃氧化层的不断破裂,金属玻璃被超声振动激活并通过破裂的氧化层扩散到基体中,同时超声振动加速了扩散的过程,最终实现金属玻璃界面的稳定结合.这种普适性的超声辅助焊接工艺可以实现金属玻璃的大块化,以及不同组分的非晶态复合材料与新性能的设计.

关 键 词：metallic glass glass-forming ability ultrasonicassisted welding atomic diffusion composition design 

分 类 号：TG139.8[一般工业技术—材料科学与工程]