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<p>The development of nanoparticle-reinforced Mg matrix composites (NPMMCs) as lightweight structural materials with balanced strength and ductility remains challenging due to nanoparticle agglomeration, interfacial oxidation, and poor melt wettability. This study introduces an innovative molten salt-assisted high-temperature dispersion strategy to overcome these limitations. By employing molten salts (MgCl₂-KCl-NaCl) as dual-functional agents for anti-oxidation and thermal dispersion, we achieve uniform spatial distribution of TiC nanoparticle (TiCnp) while suppressing interfacial reactions. Meanwhile, the superiority of the high-temperature liquid medium ameliorates the wettability of TiCnp and the Mg melt. Combined with thermomechanical processing, this approach enhances interfacial bonding and activates synergistic strengthening mechanisms, yielding a 130% improvement in yield strength. The proposed methodology establishes a scalable pathway for fabricating high-performance NPMMCs, with implications for aerospace and transportation applications requiring lightweight structural components.</p> Graphical Abstract <p></p>

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Molten salt-assisted dispersion-wetting synergy: a breakthrough strategy for fabrication of nanoparticle-reinforced Mg composites via melt processing

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年7月8日

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  • Xuanchang Zhang,
  • Xiaojun Wang,
  • Hailong Shi,
  • Xuejian Li,
  • Yuanyuan Zhang,
  • Xiaoshi Hu,
  • Chao Xu

摘要

The development of nanoparticle-reinforced Mg matrix composites (NPMMCs) as lightweight structural materials with balanced strength and ductility remains challenging due to nanoparticle agglomeration, interfacial oxidation, and poor melt wettability. This study introduces an innovative molten salt-assisted high-temperature dispersion strategy to overcome these limitations. By employing molten salts (MgCl₂-KCl-NaCl) as dual-functional agents for anti-oxidation and thermal dispersion, we achieve uniform spatial distribution of TiC nanoparticle (TiCnp) while suppressing interfacial reactions. Meanwhile, the superiority of the high-temperature liquid medium ameliorates the wettability of TiCnp and the Mg melt. Combined with thermomechanical processing, this approach enhances interfacial bonding and activates synergistic strengthening mechanisms, yielding a 130% improvement in yield strength. The proposed methodology establishes a scalable pathway for fabricating high-performance NPMMCs, with implications for aerospace and transportation applications requiring lightweight structural components.

Graphical Abstract