Preparation method of enhanced magnesium alloy-based neutron absorption plate

Abstract

The invention relates to a preparation method of an enhanced magnesium alloy-based neutron absorption plate. The method comprises the following steps: aiming at the actual condition of nuclear radiation protection, with boron carbide powder, boron powder, magnesium powder and aluminum alloy powder as raw materials, adopting a vacuum hot-pressing technique under the assisted action of an electric field, and preparing a magnesium alloy-based neutron absorption plate blank under electric field heating, resistance heating, pressurizing and vacuum conditions, so that B4C particles and B particles are evenly distributed in a matrix; oxidation of the material is effectively prevented by the vacuum environment; the interface bonding intensity is improved by the electric field action; the blank is molded in a hot extrusion manner; the particle distribution uniformity is improved; the plastic deformation property of the material is improved; the extruded blank is subjected to hot rolling to obtain the plate; the internal metallographic structure of the material is relatively dense; the preparation method is advanced in process, and accurate, detailed and accurate in data; the neutron absorption property of the magnesium alloy-based neutron absorption plate reaches 98%; the material density reaches 99%; the material hardness reaches HV0.1=186.7; the particle distribution is uniform; and the enhanced magnesium alloy-based neutron absorption plate is a lightweight and high-strength composite plate with good neutron absorption property.

Description

technical field

[0001] The invention relates to a preparation method of an enhanced magnesium alloy-based neutron absorbing plate, which belongs to the technical field of preparation and application of nonferrous metal alloys. Background technique

[0002] Magnesium alloy is a non-ferrous light metal alloy with good shock absorption, machinability, and impact resistance. It is widely used in transportation, electronics, medical equipment, and aerospace industries; magnesium alloys are also used in the nuclear industry. In terms of application, the thermal neutron absorption interface of magnesium is small, only 1 / 4 of that of aluminum. Magnesium alloys have good heat resistance, surface heat flow resistance and γ-ray radiation resistance. 2 The compatibility limit temperature can reach 500 °C, and the UK has used magnesium alloys as cladding materials for natural uranium fuel in CO 2 Used in gas-cooled reactors.

[0003] In order to improve the structure and functionality ...

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