High-quenching-rate material impact synthesis and recovery device

Abstract

The invention discloses a high-quenching-rate material impact synthesis and recovery device, which comprises a cylindrical impact loading unit and a sample cooling and recovery unit. In the sample cooling and recovery unit, a sample box is installed in a steel base, the sample box is in transition fit with the steel base, and a steel top cover is pressed on the sample box and is hermetically connected with the steel base through bolts. The lower end of a sample pipe in the cylindrical impact loading unit is open and is connected with the steel top cover through a thread. A through hole which is communicated with the sample pipe and the inner chamber of the sample box is arranged on the steel top cover. The axis of the sample pipe and the axis of the inner chamber of the sample box are on the same time. A positioning ring which is arranged on the upper surface of the steel top cover is used for supporting a lower base in the cylindrical impact loading unit and limiting the lower base to move in a plane which is perpendicular to the axis of the sample pipe. Cooling mediums are filled in the sample box. The high-quenching-rate material impact synthesis and recovery device has the advantages that the sample extraction process is simplified, more importantly, the mechanical cutting process is avoided, the introduced impurities are reduced and the cost is saved.

Description

technical field [0001] The invention provides a material impact synthesis and recovery device with high quenching rate, which is suitable for metal powder and organic powder and belongs to the technical field of technology. Background technique [0002] It is well known that the mechanical, physical and chemical properties of solids strongly depend on their crystal structure. Many solids may have different structural forms, known as isomers, due to the way their lattices are arranged. Under the ultra-high pressure and ultra-high temperature conditions generated at the moment of shock wave compression, some solid substances are prone to undergo isomeric phase transitions, which is also conducive to the emergence of certain high-temperature and high-pressure phases of substances, thereby preparing new substances that are difficult to obtain by conventional methods. Mutually. The activation effect of shock waves on inorganic substances is mainly manifested as: inorganic subst...

AI Technical Summary

Problems solved by technology

Moreover, when the axial pressure is too high, the plug will be penetrated, and most samples cannot be recovered

[0006] (2) When the axial loading speed is too high, it will also cause radial rebound, which will break the sample tube and make it impossible to recover the sample

[0007] (3) The cylindrical convergent detonation wave generated by the cylindrical impact loading device converges toward the center along the radial direction of the sample tube and collides near the central axis of the sample, which greatly increases the shock wave pressure near the central axis of the sample. The outward impact pressure in the radial direction gradually decreases, and some high-pressure phases and metastable phases are only formed at the axis, and the yield is not high

Its disadvantages are: on the one hand, the difficulty of recovery is increased, the amount of sample recovery is small, and on the other hand, the cost of experiments increases

The quenching problem after sample recovery is not considered, and the sample is naturally cooled to room temperature, which is not conducive to the formation of some metastable phases and mesophase materials

Images