Tungsten/PEEK radiation protection composite wire for 3D printing and preparation method thereof

Abstract

The invention discloses a tungsten / PEEK radiation protection composite wire for 3D printing and a preparation method thereof. Raw materials are weighed according to the following ratio (by weight): 100 parts of tungsten powder, 40-50 parts of a PEEK material, 0.25-0 .75 part of a plasticizer and 0.125-0.75 part of a titanate coupling agent. The tungsten / PEEK radiation protection composite wire for3D printing is prepared by the following steps: melting and stirring, twin-screw extrusion and granulation, single-screw extrusion of wires, wire leveling and cooling by a wire leveling machine, andreeling and bundling by a coiler. The composite wire of the invention is mainly applied in the nuclear electrical field. The tungsten / PEEK radiation protection composite wire has the following application advantages: the specially developed composite material is applied allusion to the 3D printing process and nuclear radiation protection field; and the PEEK material has excellent radiation resistance and superior mechanical properties in comparison with other polymer materials; breakthrough of zero in radiation protection composite materials in the 3D printing field is achieved, and the application of the 3D printing technology in the field of nuclear radiation shielding component manufacturing is also creatively advanced.

Description

technical field [0001] The invention relates to a composite 3D printing wire, in particular to a tungsten / PEEK radiation protection composite wire for 3D printing and a preparation method thereof. Background technique [0002] In an increasingly nuclear-powered society, there is an increasing need for radiation shielding materials. In terms of the harmfulness of various rays to the human body, gamma rays and neutrons rank first. The main task of nuclear radiation shielding design is to shield gamma rays and neutrons. Among them, the shielding materials for gamma rays generally use high atomic number materials and general building materials, including iron, tungsten, lead, depleted uranium, concrete, bricks, ionized water, etc. At present, the commonly used shielding materials are mostly lead alloys. However, lead alloys have many disadvantages: secondary bremsstrahlung will be produced, hardness is relatively poor, large-sized shielding components have poor structural per...

AI Technical Summary

Problems solved by technology

However, lead alloys have many disadvantages: secondary bremsstrahlung will be produced, hardness is relatively poor, large-sized shielding components have poor structural performance, and low mechanical strength. At the same time, lead itself is a source of heavy metal pollution, which is likely to cause heavy metal poisoning during use. App is being restricted

In terms of radiation protection applications, if there is a problem with the parts of nuclear power equipment, the replacement cycle will be longer, resulting in too long a waiting time for nuclear power equipment to stop, and the additive manufacturing process can realize rapid prototyping of parts, which will greatly improve Shorten downtime of nuclear power equipment

Tungsten is a refractory metal with a high melting point. It has the characteristics of high strength, poor plasticity, and poor toughness. It is difficult to be directly used for additive manufacturing molding.

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