Room-temperature mechanical loading device for metal beryllium in neutron scattering experiment

Abstract

The invention discloses a room-temperature mechanical loading device for metal beryllium in a neutron scattering experiment. The loading device comprises a sealed cavity, an incident window plate, an emergent window plate, a sealing cover, a sealing ring, a loading rod, a corrugated pipe, a sealing flange, a sample fixture, a dowel, a vacuumization crossover coupling and a vacuum manometer. A sample feeding hole is formed in the sealed cavity of the room-temperature mechanical loading device for metal beryllium in the neutron scattering experiment and matched with the sample fixture to complete loading and unloading of a sample, the cavity is sealed through the sealing cover, mechanical loading of the sample by certain displacement can be ensured to be realized by means of the telescopic characteristic of the corrugated pipe in a telescopic connection assembly when the inside of the sealed cavity is in a negative pressure state, so that metal beryllium powder produced after the sample is broken cannot leak to the outside of the sealing cavity, the device has the advantages of being simple in structure, easy to establish and safe and reliable in performance, and the risk that an experimenter is harmed by metal beryllium powder can be prevented effectively.

Description

technical field [0001] The invention belongs to the technical field of environmental loading in the application of neutron scattering (diffraction), in particular to a mechanical loading device at room temperature for metal beryllium in neutron scattering experiments. Background technique [0002] Metal beryllium is a strategic and key material, which has important applications in the fields of aerospace and nuclear energy. Neutron scattering technology has the characteristics of non-destructive testing and deep penetration, and can directly measure the internal microstructure, interface structure, internal defects, stress distribution and other characteristics of materials. When the neutron scattering technique is used to measure the mechanical loading of beryllium metal, a small amount of beryllium powder will be produced at the fracture of the metal beryllium sample, and the beryllium powder is a highly toxic substance, light in weight and easy to float in the air. If the...

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Problems solved by technology

[0003] At present, on the one hand, because domestic neutron scattering (diffraction) diffraction technology is in its infancy, the design of related environmental loading equipment is relatively small; Therefore, there are fewer units and individuals engaged in experiments on metal beryllium, especially the experiments using neutron scattering technology to carry out mechanical loading tests on metal beryllium, and there is no related device report in China

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