Aluminum-based boron carbide additive manufacturing method and device based on in-situ reaction

Abstract

The invention provides an aluminum-based boron carbide additive manufacturing method and device based on in-situ reaction. The method comprises the steps that (1), on the vacuum condition, aluminum alloy powder is laid on a laser selection area, a laser beam is emitted to carry out selection area melting on the aluminum alloy powder of the laser selection area, and an aluminum alloy layer is obtained; (2), simple substance carbon and simple substance boron mixed powder is laid on the aluminum alloy layer, a laser beam is emitted to conduct selection area melting on the simple substance carbonand simple substance boron mixed powder, boron carbide is generated in real time through the in-situ reaction, a boron carbide layer is obtained, and interlayer fusion of the boron carbide layer and the aluminum alloy layer is completed; and (3), the step (1) and the step (2) are repeated until the required product is finished. The manufacturing method is simple in technological process, and the obtained composite material with the B4C particles uniformly dispersed and distributed in a aluminum matrix has high critical safety when used as a spent fuel storage grid material or a spent fuel transfer container. The invention further provides an aluminum-based boron carbide additive manufacturing device based on the in-situ reaction.

Description

technical field [0001] The invention relates to a preparation method of an aluminum-based boron carbide composite material, in particular to an aluminum-based boron carbide additive manufacturing method and device based on an in-situ reaction. Background technique [0002] At present, domestic spent fuel storage grids have achieved independent design, but the key neutron absorbing materials are still mainly imported, which greatly restricts the localization process of spent fuel storage grids. Therefore, it is urgent to accelerate the development and production of neutron absorbing materials for spent fuel storage. With the rapid development of my country's nuclear power industry, the amount of spent fuel generated during its operation has increased dramatically. After the spent fuel is removed from the reactor, its chain reaction will continue for a long time, so it also has a large decay energy and may return to nuclear criticality. Therefore, neutron-absorbing materials...

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Problems solved by technology

Generally speaking, only the original ingot is obtained through traditional manufacturing methods, but when the boron carbide content increases, the machinability of the ingot becomes worse

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