Carbon-aluminum interface wetting and structure regulating and controlling device and method under ultrasonic field coupling

Abstract

A carbon-aluminum interface wetting and structure regulating and controlling device and method under ultrasonic field coupling are provided. The device comprises a vacuum cover, an object stage, a crucible, a radiator, a coupler, a liquid adding device, a heating resistance and a thermocouple; the radiator is connected with the coupler and an ultrasonic power supply; the object stage is assembled together with a thread screw rod and a drive motor; the vacuum cover is communicated with an atmosphere control device, an inert gas system and a vacuum pump system through valves. The method comprises the steps: placing a carbon substrate in the crucible; adjusting an atmosphere in the vacuum cover; adding a metal melt into the crucible, and adjusting the height of the object stage; vacuumizing; introducing an inert gas to the normal pressure; heating through the heating resistance; controlling the carbon substrate to rotate so as to make a metal melt oxide film ruptured; and carrying out ultrasonic coupling of the metal melt. The device and the method are integrated with acoustic streaming and cavitation of an ultrasonic field, and obtain ideal interface structure control conditions through optimization of acoustic field collaborative conditions and optimization of wetting and interface reaction conditions.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a carbon-aluminum interface wetting and structure regulation device and method under ultrasonic field coupling. Background technique [0002] Liquid / solid wetting and interfacial behavior is a common physical and chemical phenomenon in the process of material preparation and chemical synthesis. It is a key technical link in materials engineering, which largely determines the possibility of material preparation, the final tissue performance, and production efficiency. [0003] For example: in the in-situ synthesis process of AlTiC grain refiner and TiC particle reinforced Al-based composite material, due to the poor wettability between C (Carbon) and Al melt, C powder often adsorbs impurities such as gas, which is easy to generate hydrogen bonded and aggregated into clusters, making it difficult for the Al melt to infiltrate into the interior of the C powder for rea...

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Problems solved by technology

[0005] However, the acoustic flow effect of the ultrasonic field will cause circulation and turbulence in the melt, and the scattering effect of the solid phase interface will form a reverberation sound field in the melt , so that the sound field synergy conditions such as sound pressure value, amplitude value and sound flow velocity in the sound field are disordered, and the sound field mode is difficult to control, so that there is no uniform cavitation threshold in each region of the melt, resulting in the research of ultrasonic field melt processing. The experimental results will show a large data dispersion; for example: according to the research results of Jasiuniene et al., in the process of ultrasonic field coupling, when the Disk shape transducer (disc-shaped radiator) generates longitudinal vibration, the ultrasonic field energy transfer The simulation results of the sound field partitioning and sound field distribution after scattering in the melt at the front end of the radiator for an infinite melt show obvious inhomogeneity (the reverberation sound field is formed), if the reflection of the melt boundary is considered , the unevenness of the sound field will be more serious

[0006] Therefore, in the original ultrasonic field coupling process, because the sound field mode is difficult to control, the sound field synergy conditions in the melt are not uniform, and it is impossible to find the sound field synergy conditions and liquid It is also impossible to accurately reveal or verify the mechanism of liquid / solid wetting and interface structure regulation under the coupling of ultrasonic field, as well as the related process condition parameters.

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