High-thermal-conductivity magnesium-based composite material and preparation method therefor

By introducing thermally conductive reinforcing agents and metal element powders into magnesium alloys and employing a semi-solid injection molding process, the problems of poor thermal conductivity and difficult molding in magnesium alloy composites have been solved, resulting in magnesium alloy composites with high thermal conductivity and good formability.

WO2026144415A1PCT designated stage Publication Date: 2026-07-09HUAWEI TECH CO LTD
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
HUAWEI TECH CO LTD
Filing Date
2025-10-20
Publication Date
2026-07-09

AI Technical Summary

Technical Problem

Existing magnesium alloy composites have poor thermal conductivity, making it difficult to uniformly disperse the thermally conductive reinforcing phase and resulting in poor interfacial bonding, which leads to increased thermal resistance. Furthermore, traditional processes are not suitable for forming complex structures.

Method used

By introducing thermally conductive reinforcement and first metallic element powder into magnesium alloys and using a semi-solid injection molding process, a uniform dispersion of thermally conductive reinforcement and intermetallic compound is formed, constructing a three-dimensional heat conduction pathway and improving interfacial bonding.

Benefits of technology

It significantly improves the thermal conductivity and formability of magnesium alloy composites, achieving a combination of high thermal conductivity and good formability, making it suitable for large-scale production.

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Abstract

Embodiments of the present application provide a magnesium alloy composite material, a preparation method therefor and a use thereof. The magnesium alloy composite material comprises a magnesium alloy matrix, and a thermal conductivity enhancer and a first metal element dispersed in the magnesium alloy matrix; the magnesium alloy matrix comprises a secondary α-Mg phase and a primary α-Mg phase dispersed in the secondary α-Mg phase; in the magnesium alloy composite material, the total mass percentage of the thermal conductivity enhancer is 5%-30%; the first metal element and the constituent elements of the magnesium alloy matrix form a first intermetallic compound. The magnesium alloy composite material internally simultaneously comprises the primary α-Mg phase, the thermal conductivity enhancer, and the intermetallic compound formed by the first metal element and the constituent elements of the magnesium alloy matrix; under the synergistic effect of the components, the magnesium alloy composite material has both high thermal conductivity and good formability.
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