A method for preparing micro-nano silicon phase Al-50Si alloy based on multi-level high-speed ball milling and spark plasma sintering
By employing multi-stage high-speed ball milling and spark plasma sintering processes, the problems of silicon phase coarsening and non-dense microstructure in Al-50Si alloys were solved, enabling the preparation of high-performance alloys, simplifying the process flow and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Filing Date
- 2026-05-25
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional processes for preparing Al-50Si alloys result in coarsening of the silicon phase, non-dense microstructure, and deterioration of performance. Furthermore, the processes are complex, costly, and difficult to achieve uniform and precise control of the silicon phase size.
A multi-stage high-speed ball milling and spark plasma sintering method was adopted to prepare micro-nano silicon powder by graded ball milling with high-energy WC balls and medium-energy steel balls, and combined with a segmented temperature and pressure controlled spark plasma sintering process to prepare a dense Al-50Si alloy with excellent performance.
It achieves precise control of silicon phase size, has a uniform internal structure, excellent mechanical and thermal conductivity, reduces raw material costs and preparation complexity, and is suitable for large-scale production.
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