Preparation method of aluminum base gadolinium oxide neutron absorbing plate

Abstract

The invention relates to a preparation method of an aluminum base gadolinium oxide neutron absorbing plate. The compact aluminum base gadolinium oxide neutron absorbing plate is prepared to meet a protection requirement of neutron radiation shielding for a spent fuel storage rack of a nuclear power station, and is prepared with aluminum powder, gadolinium oxide powder and copper powder as raw materials after powder metallurgy is performed and rolling is performed. The neutron absorbing plate is silver white. The neutron absorption rate is 95%. The gadolinium oxide distributes uniformly. Particles are closely connected with a matrix. The tensile strength is 170MPa and the elongation is 12%. The preparation method is advanced and reasonable in technology and accurate and full in parameter, and is an advanced method for preparing the aluminum base gadolinium oxide neutron absorbing plate.

Description

technical field [0001] The invention relates to a method for preparing an aluminum-based gadolinium oxide neutron absorbing plate, which belongs to the technical field of preparation and application of nonferrous metal materials. Background technique [0002] There is strong neutron radiation in the spent fuel storage grid of nuclear power plants. With the development of nuclear power plants, the protection of neutron radiation has become an urgent problem to be solved; in order to prevent nuclear radiation, neutron absorbing materials and technologies are often used for shielding and protection, which puts extremely strict requirements on the performance of neutron absorbing materials. [0003] At present, most neutron shielding materials use boron-containing organic substances. These materials have the advantages of small size and light weight, but their corrosion resistance is poor and their life is short; metal cadmium plates can also be used as neutron absorbing materia...

AI Technical Summary

Problems solved by technology

[0003] At present, most neutron shielding materials use boron-containing organic substances. These materials have the advantages of small size and light weight, but their corrosion resistance is poor and their life is short; metal cadmium plates can also be used as neutron absorbing materials, but they will be damaged in humid environments. Produces toxic substances and is not widely used; lead plate can slow down the speed of neutrons, but the neutron absorption performance is poor; aluminum-based boron carbide composite materials have strong neutron absorption capacity, with the increase of boron carbide content neutron The better the absorption performance, but B 4 The increase of C content leads to the decrease of its ductility and the increase of brittleness, which finally reduces the toughness of the material.

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