Preparation method of reinforced AlCoCrFeNi2 high-entropy alloy base neutron absorbing material and application

Abstract

The invention belongs to the technical field of nonferrous metal alloy preparation, and in particular, relates to a preparation method of a reinforced AlCoCrFeNi2 high-entropy alloy base neutron absorbing material. The preparation method comprises the following steps: the ball milling and the mixing are performed on Al powder, Co powder, Cr powder, Fe powder and Ni powder according to a mole ratioof 1: 1: 1: 1: 2 to prepare AlCoCrFeNi2 high-entropy alloy powder; the ball milling and the mixing are performed on the AlCoCrFeNi2 high-entropy alloy powder, the Al powder and B4C powder according to a volume ratio of 6: 3: 1; a plasma discharge sintering technology is adopted to sinter under the conditions of vacuum, resistance heating and pressurization to prepare the reinforced AlCoCrFeNi2 high-entropy alloy base neutron absorbing material; B4C particles are uniformly distributed in a basal body; through adding of the Al powder, the plastic deformation capacity of the material can be further improved; the oxidation of the material can be effectively prevented in the vacuum environment; through plasma discharge quick sintering, the growth of grains in the material can be prevented; local high temperature is generated by particle tip discharge to improve the interface connecting strength of the material; the preparation method is advanced in process and precise and accurate in data;the compactness of the AlCoCrFeNi2 high-entropy alloy base neutron absorbing material can reach 98%; the hardness can reach HV0.5=563.3; and the tensile strength can reach 340 MPa.

Description

technical field [0001] The invention belongs to the technical field of preparation and application of non-ferrous metal alloys, in particular to an enhanced AlCoCrFeNi 2 A method for preparing high-entropy alloy-based neutron-absorbing materials. Background technique [0002] B 4 C ceramic is a good neutron absorber, the isotope of B 10 The thermal neutron absorption cross section of B is 3840 b, the equivalent thermal neutron absorption cross section of natural B is 764 b, the natural abundance of natural B is 19.9, the secondary ray energy after neutron absorption is low, and it will not Hazardous radioactive isotopes have been widely used in the nuclear industry; however, they are brittle and difficult to meet the requirements of nuclear radiation protection; therefore, B 4 C is added to the metal matrix with excellent plastic deformation ability, such as aluminum alloy, magnesium alloy, etc. [0003] High-entropy alloy is a new type of metal material with a unique co...

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Problems solved by technology

[0002] B 4 C ceramic is a good neutron absorber, the isotope of B 10 The thermal neutron absorption cross section of B is 3840 b, the equivalent thermal neutron absorption cross section of natural B is 764 b, the natural abundance of natural B is 19.9, the secondary ray energy after neutron absorption is low, and it will not Hazardous radioactive isotopes have been widely used in the nuclear industry; however, they are brittle and difficult to meet the requirements of nuclear radiation protection; therefore, B 4 C is added to the metal matrix with excellent plastic deformation ability, such as aluminum alloy, magnesium alloy, etc.

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