Microgravity solidification device for metal droplets

Abstract

The invention discloses a microgravity solidification device for metal liquid droplets. The upper end of a tube body is a sample installation section, and a liquid quenching collector is placed in a tube at the lower end. A sample is placed at the bottom in the test tube located in the sample installation section. A heating coil sleeves the tube body and is located at the lower end of the test tube, so that the sample is located in the middle of the axial height of the heating coil. The test tube communicates with an experimental atmosphere source through a gas flow controller. A vacuum pump and the experimental atmosphere source both communicate with the sample installation section and the test tube through a gas path control end. The center of the bottom end of the test tube is providedwith a through hole, the through hole is used for dispersing a sample after being melted into droplets with different diameters, and the droplets fall freely into the liquid quenching collector at thelower end of the tube body through the tube body. With adopting of a microgravity and liquid quenching effect integrated rapid solidification technology, free falling of the metal liquid droplets inthe tube body is combined with subsequent liquid quenching shock cooling, so that rapid solidification of the large-size millimeter-level metal liquid droplets in the shorter tube body under the action of microgravity is achieved.

Description

technical field [0001] The invention belongs to the field of space materials and relates to a device for realizing rapid solidification of metal droplets under microgravity conditions. Background technique [0002] The rapid development of modern science in high-speed photography, diffraction analysis, large-scale computer and other technologies has created conditions for the continuous deepening of research in the field of solidification. Its research direction has been extended from the initial steady state conventional solidification to metastable state and unsteady supernormal solidification. Rapid solidification is a typical supernormal solidification, that is, the method of high cooling rate or large supercooling is used to achieve rapid phase transition. Generally, the crystal growth rate is greater than 1 cm / s. At the same time, the rapid development of aerospace technology has realized the dream of human beings to fly into outer space. The space environment charac...

AI Technical Summary

Problems solved by technology

At present, the rapid microgravity solidification of millimeter-scale metal droplets can only be realized by effectively adjusting the length design of the tube body, that is, the free fall length of the metal droplets (generally greater than 3m). Higher requirements, while increasing the cost of experimental equipment and experimental time, which greatly limits the development of related scientific research and technology applications

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