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<p>This study proposes a strategy that combines rapid powder rolling with Al–Ce eutectic powder to fabricate AA2024/W/Al–Ce eutectic powder composites with combined structural and functional properties. Based on the interface optimization enabled by the eutectic particles, the powder rolling process achieved a high relative density of approximately 98% within an extremely short densification period and led to a favorable phase distribution along with enhanced interfacial bonding. However, microstructural and property analyses revealed that the composite exhibits significant temperature sensitivity, primarily attributed to the phase transformation of Al<sub>11</sub>Ce<sub>3</sub> into Al<sub>3</sub>CeCu at elevated temperatures. The resulting Cu enrichment severely compromises the mechanical properties of the material. By integrating rapid powder rolling densification with a quenching process, such detrimental diffusion reactions can be effectively suppressed, while a microstructure conducive to solid solution and natural aging is established. Ultimately, the quenched composite achieved a peak tensile strength of 408&#xa0;MPa, which represents an improvement of 24.96% over the air-cooled condition. This work provides a scalable preparation route for high-performance aluminum matrix composites and demonstrates its effectiveness in mitigating diffusion-induced phase transformations.</p>

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Synergizing composition optimization and rapid powder rolling in Al–W–Ce composites: a strategy for optimized microstructure and mechanical performance

  • 期刊论文

  • 发表日期：

    2026年3月17日

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  • Wentao Tang,
  • Zheng Lv,
  • HaiCheng Wang,
  • ChangHui Mao,
  • ZhongKun Lin

摘要

This study proposes a strategy that combines rapid powder rolling with Al–Ce eutectic powder to fabricate AA2024/W/Al–Ce eutectic powder composites with combined structural and functional properties. Based on the interface optimization enabled by the eutectic particles, the powder rolling process achieved a high relative density of approximately 98% within an extremely short densification period and led to a favorable phase distribution along with enhanced interfacial bonding. However, microstructural and property analyses revealed that the composite exhibits significant temperature sensitivity, primarily attributed to the phase transformation of Al11Ce3 into Al3CeCu at elevated temperatures. The resulting Cu enrichment severely compromises the mechanical properties of the material. By integrating rapid powder rolling densification with a quenching process, such detrimental diffusion reactions can be effectively suppressed, while a microstructure conducive to solid solution and natural aging is established. Ultimately, the quenched composite achieved a peak tensile strength of 408 MPa, which represents an improvement of 24.96% over the air-cooled condition. This work provides a scalable preparation route for high-performance aluminum matrix composites and demonstrates its effectiveness in mitigating diffusion-induced phase transformations.