Ultrasonic Assisted Sn Wetting On The Zr₅₅Cu₃₀Al₁₀Ni₅ Metallic Glass And The Study Of The Diffusion Layer

The Amorphous alloy was made by Duwes who is an American professor using rapid quenching in 1960.After 20 years developed,the Amorphous alloy was improved to the second generation in the late 1980 s. called bulk metallic glasses which is promoted on the size. The Zr55Cu30Al10Ni5 named Inoue alloy shows a excellent mechanical property, which is applied widely in industrial produce and scientific research. The intensity, inflexibility, corrosion resistance and soft magnetic of the BMGs perform outstanding. What is more, the BMGs is the most suitable material for nano-meter fabrication. However, it is hard to produce the jumbo size or specific BMGs. It is necessary to make the BMGs large size or specific using the jointing technique. Till now the BMGs is jointed by welding, such as fricition stir welding, explosion welding, Pulse electric current welding and etc. But it can not be avoid that the temperature of the BMGs increase uncontrollable making the BMGs crystallization losing the excellent mechanical property. My research is to indicate the interaction between the Sn and Zr55Cu30Al10Ni5 BMG under specific temperature making use of the melt point of Sn is lower than the glass transition temperature(Tg) of the BMGs including making the Sn wetting and spread out on the BMGs,indicating the combination condition of Sn and BMGs, the elements of intermetallic compound and indicating the kinetics of the interaction between Sn and Zr55Cu30Al10Ni5 BMGs.There exist oxidation film on the surface of BMGs which makes it hard for Sn wetting and spreading out on the BMGs. It is imperative to use the ultrasonic assisting the wetting process of Sn on the BMGs. The process of the interaction between Sn and the BMGs include wetting, spreading out and slowly diffusion growth. The time-temperature-transition(TTT) curve shows the time of transition under different temperature assisting to find the longest conducting time of heat treatment which make sure the diffusion process abundantly. After the heat treatment, it is indicated that the surface and connection condition,the theory and process of ultrasonic assisted oxidation film removed, the relationship of the experiment parameter and the thickness of interlayer, the elements of the interlayer, and the kinetics of interaction between Sn and BMGs.The experiment shows that it is viable to make Sn wetting on the BMGs after immersed in the strong chloride solution and moving the BMGs to the melt Sn immediately. But the timeliness of this treatment is poor and it is easy tobring the impurities to the interlayer. There is no such problem in ultrasonic assisting Sn wetting on the BMGs. It contributes for the increasing of the interlayer to improve the time and amplitude of the ultrasonic treatment. The result of the component analysis indicates that the interlayer growing with the time of insulating treatment increasing. It is speculated that the element of the interlayer is Zr-Sn compound. But it cannot be sure the accurate compound.Along with addition of element Al, the thickness of the interlayer increases a lot under the same experimental parameter and the element of the interlayer change.