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<p>In this study, we successfully fabricated an aluminum matrix composite reinforced with 13 wt.% in-situ Al<sub>2</sub>BC and 15.2 wt.% MgAl<sub>2</sub>O<sub>4</sub> particulates through a combination of liquid–solid reaction synthesis and subsequent hot extrusion. Microstructural characterization reveals that the as-extruded composite exhibits a refined matrix with an average grain size of 1.32&#xa0;<i>μ</i>m in the longitudinal direction, accompanied by a predominant &lt;111&gt; //ED crystallographic texture. The developed composite demonstrates remarkable mechanical properties with a low density of 2.81&#xa0;g&#xa0;cm<sup>−3</sup>, combined with an enhanced Young's modulus (99 GPa) and exceptional ultimate tensile strength (510&#xa0;MPa). Notably, the material displays significant work-hardening behavior, attributed to the effective dislocation pinning mechanism facilitated by the synergistic interaction between Al<sub>2</sub>BC and MgAl<sub>2</sub>O<sub>4</sub> reinforcing particles.</p>

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In Situ Fabrication of an Al Matrix Composite Reinforced with MgAl2O4 and Al3BC Particles

  • 期刊论文

  • 发表日期：

    2025年7月14日

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  • Xiaodi Ma,
  • Tong Gao,
  • Jingyi Hu,
  • Guiliang Liu,
  • Xiangfa Liu

摘要

In this study, we successfully fabricated an aluminum matrix composite reinforced with 13 wt.% in-situ Al2BC and 15.2 wt.% MgAl2O4 particulates through a combination of liquid–solid reaction synthesis and subsequent hot extrusion. Microstructural characterization reveals that the as-extruded composite exhibits a refined matrix with an average grain size of 1.32 μm in the longitudinal direction, accompanied by a predominant <111> //ED crystallographic texture. The developed composite demonstrates remarkable mechanical properties with a low density of 2.81 g cm−3, combined with an enhanced Young's modulus (99 GPa) and exceptional ultimate tensile strength (510 MPa). Notably, the material displays significant work-hardening behavior, attributed to the effective dislocation pinning mechanism facilitated by the synergistic interaction between Al2BC and MgAl2O4 reinforcing particles.