Preparation method of metal ceramic fuel based on powder extrusion printing

Through powder extrusion printing technology, the problem of metal ceramic fuel molding has been solved, and the efficient preparation of complex-shaped fuels has been achieved, which reduces costs and improves density and performance consistency.

CN120587478APending Publication Date: 2025-09-05CHINA NORTH NUCLEAR FUEL CO LTD
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Patent Information

Application Number
CN202510629703.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-05-16
Publication Date
2025-09-05

AI Technical Summary

Technical Problem

It is difficult to efficiently prepare metal ceramic fuels of complex shapes with existing technologies. The preparation process is complicated and costly, and mechanical processing can easily cause damage to the fuel phase.

Method used

Using powder extrusion printing technology, through the steps of mixing, granulation, printing, degreasing and sintering, the near-net shaping of metal ceramic fuel is achieved, the hot processing temperature is reduced, the fuel phase type and loading amount are adjusted, and complex-shaped fuel core blocks are prepared.

Benefits of technology

It achieves near-net-net shaping of complex-shaped metal-ceramic fuels, reduces production difficulty and cost, and improves the density and performance consistency of the fuel.

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Abstract

The invention belongs to the technical field of nuclear fuel preparation, and provides a metal ceramic fuel preparation method based on powder extrusion printing, which comprises the following steps: weighing matrix powder, fuel phase powder or microspheres and a binder according to a ratio, adding into an internal mixing chamber, carrying out internal mixing granulation and pelletizing to obtain a metal ceramic feed, enabling the metal ceramic feed and the matrix feed to be in a slurry state, and printing to obtain the metal ceramic fuel based on powder extrusion printing. And the printed metal ceramic fuel green body is immersed in a degreasing solvent and heated in a water bath, the green body degreased through the solvent is subjected to thermal degreasing, the metal ceramic fuel green body is heated, a heat preservation point is set, a metal ceramic fuel brown blank is obtained, and the degreased metal ceramic fuel brown blank is subjected to densification sintering. Near-net forming of the metal ceramic fuel pellet in a complex shape can be achieved, and the production and manufacturing difficulty and cost can be reduced.
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