Wetting of carbon by molten aluminum under ultrasonic field

Abstract

Ultrasonic field couple technique has become an effective way to regulate and control the behavior of liquid-solid interface such as wetting, mass transfer and structure in the crossing field of materials science and acoustics. At present, there is no suitable experimental method and technology to systematically study the interfacial behavior regulate and accurately describe the control mechanism of the interfacial structure. In this regard, based on the construction of the “wetting-mass transfer-structural evolution” trinity framework relationship, through the systematic research of the interface behavior of aluminum melt, the experimental method and technology of the interface behavior of aluminum liquid-solid under the ultrasonic field are formed. In this paper, the poor wetting of aluminum and carbon in the preparation of Al-Ti-C grain refiner is investigated. The wetting of aluminum and carbon is improved by the synergistic effect of the ultrasonic field and multifunctional flux K2TiF6. The microstructure of aluminum- carbon interface under an optical microscope and scanning electron microscope has been discussed. Meanwhile, the wetting behavior of liquid aluminum on graphite substrate is numerically simulated under ultrasonic field. The results show that the ultrasonic field greatly improves the wetting of aluminum and carbon.