不同超声处理时间下Ti-Cu合金在镁熔体中的脱合金反应  

Dealloying Reaction of Ti-Cu Alloy in Mg-Melt Under Different Ultrasonic Treatment Time

作　　者：余圣 张震 赵觅 郭威 严有为[1,2] 吴树森[1] YU Sheng;ZHANG Zhen;ZHAO Mi;GUO Wei;YAN You-wei;WU Shu-sen(State Key Laboratory of Material Processing and Die&Mould Technology,School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China;School of Aeronautics and Astronautics,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China;State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body,Hunan University,Changsha 410082,Hunan,China;Research Institute of Huazhong University of Science and Technology in Shenzhen,Shenzhen 518057,Guangdong,China)

机构地区：[1]华中科技大学材料学院材料成形与模具技术国家重点实验室,湖北武汉430074 [2]华中科技大学航空航天学院,湖北430074 [3]湖南大学汽车车身先进设计及制造国家重点实验室,湖南长沙410082 [4]深圳华中科技大学研究院,广东深圳518057

出　　处：《铸造》2022年第5期592-597,共6页Foundry

基　　金：国家自然科学基金(52101138);新金属材料国家重点实验室开放基金(2020-Z01);金属材料强度国家重点实验室开放基金(20202205);广东省基础与应用基础研究基金(2020A1515110531);汽车车身设计及制造国家重点实验室开放基金(32015001);湖北省自然科学基金(2020CFB259)。

摘　　要：为提高Ti-Cu二元合金在Mg熔体中的脱合金反应速率,通过在Mg熔体中引入超声场作用,研究超声作用下金属熔体中的脱合金反应过程及反应速率。研究发现,超声场可促进脱合金反应进行,但随着超声时间的增加,超声场的促进作用逐渐削弱。超声场在熔体中产生的空化和声流效应可加速脱出元素Cu向Mg熔体中的扩散,但过长的超声时间引起界面处Cu原子聚集,减弱了促进作用。The kinetic conditions of the dealloying reaction of Ti-Cu binary alloy in Mg melt still need to be optimized,that is,to increase the reaction rate.In this study,by introducing superfluous field effect in the Mg melt,the dealloying reaction process and reaction rate in metal melt under ultrasonic action were studied.The study found that the ultrasonic field promoted the dealloying reaction,and as the ultrasonic time increased,the promotion effect of the ultrasonic field gradually weakened.The cavitation and acoustic current effects produced by the ultrasonic field in the melt accelerated the diffusion of the extracted element Cu into the Mg melt,but the excessively long ultrasonic time caused the Cu atoms at the interface to gather and weaken the promotion effect.

关 键 词：脱合金反应 纳米多孔Ti 超声处理 反应速率 

分 类 号：TB559[理学—物理]