A nanodiamond particle-reinforced iron-based metal powder and its preparation method

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By using powder mixing and heat treatment methods, nanodiamond particles are uniformly distributed in iron-based metal powder, which solves the problems of easy agglomeration and graphitization of nanodiamonds in metal matrices, and improves the strength, hardness and wear resistance of the material, making it suitable for 3D printing high-performance steel materials and high-entropy alloys.

CN119772170BActive Publication Date: 2026-07-17XI AN JIAOTONG UNIV

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Patents(China)
Current Assignee / Owner: XI AN JIAOTONG UNIV
Filing Date: 2025-01-10
Publication Date: 2026-07-17

AI Technical Summary

Technical Problem

Nanodiamonds tend to agglomerate and graphitize in metal matrices, and their bonding strength with the matrix is relatively low, which affects the mechanical properties and application range of the material.

Method used

By mixing powders and heat treatment, nanodiamond particles are uniformly distributed on the surface of iron-based metal powder. Heat treatment is then carried out under vacuum or argon protection, with temperature and time controlled to achieve the penetration and uniform distribution of diamond particles.

Benefits of technology

Nanodiamond particles are uniformly distributed in iron-based metal powder, avoiding agglomeration and graphitization, improving the strength, hardness and wear resistance of the material, and ensuring the stability of material properties during 3D printing.

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Abstract

This invention discloses a nanodiamond particle-infiltrated iron-based metal powder and its preparation method. The method involves mixing iron-based metal powder and nanodiamond particles, ensuring the nanodiamond particles are uniformly distributed on the surface of individual iron-based metal powder particles. The amount of nanodiamond particles added is 0.1% to 5% of the mass of the iron-based metal powder. The mixed powder is then heat-treated under vacuum and / or argon protection to obtain the nanodiamond particle-infiltrated iron-based metal powder. This method effectively allows nanodiamond particles to infiltrate the interior of the iron-based metal powder, solving the technical problems in existing technologies where nanodiamonds easily agglomerate, graphitize, and have low bonding strength with the matrix when dispersed in a metal matrix.

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