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<p>The hot press sintering and heat treatment processes each play a crucial role in influencing the interface between the fibers and the matrix alloy; therefore, this work evaluated the interfacial evolution between carbon fibers and the matrix alloy in SiC<sub>p</sub>-C<sub>f</sub>/Al composites under sintered and heat-treated conditions. 5SiC<sub>p</sub>-5C<sub>f</sub>/ZL109 hybrid-reinforced aluminum matrix composites were prepared by hot pressing sintering and T6 heat treatment to investigate their microstructure and properties. The analysis revealed that the SiC<sub>p</sub> and C<sub>f</sub> were uniformly distributed in the matrix alloy, and after heat treatment, Ni diffused and the Al<sub>3</sub>Ni phase on the surface of the carbon fiber transformed into a jagged one. The mechanical interlock between the carbon fiber and the matrix alloy was formed by the jagged Al<sub>3</sub>Ni phase, which improved the interface bonding between the carbon fiber and the matrix alloy. The yield strength and the tensile strength of the heat-treated 5SiC<sub>p</sub>-5C<sub>f</sub>/ZL109 hybrid-reinforced aluminum matrix composites reached 324&#xa0;MPa and 343&#xa0;MPa, respectively, 93.3% and 55.5% higher than those of the matrix alloy.</p>

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Effect of heat treatment on microstructure and properties of SiCp-Cf/ZL109 aluminum matrix composites prepared by hot pressing sintering

  • 期刊论文

  • 发表日期：

    2025年1月20日

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  • Wenda Zhang,
  • Yuncong Shang,
  • Jinjie Wang,
  • Hongbin Liu,
  • Hong Xu

摘要

The hot press sintering and heat treatment processes each play a crucial role in influencing the interface between the fibers and the matrix alloy; therefore, this work evaluated the interfacial evolution between carbon fibers and the matrix alloy in SiCp-Cf/Al composites under sintered and heat-treated conditions. 5SiCp-5Cf/ZL109 hybrid-reinforced aluminum matrix composites were prepared by hot pressing sintering and T6 heat treatment to investigate their microstructure and properties. The analysis revealed that the SiCp and Cf were uniformly distributed in the matrix alloy, and after heat treatment, Ni diffused and the Al3Ni phase on the surface of the carbon fiber transformed into a jagged one. The mechanical interlock between the carbon fiber and the matrix alloy was formed by the jagged Al3Ni phase, which improved the interface bonding between the carbon fiber and the matrix alloy. The yield strength and the tensile strength of the heat-treated 5SiCp-5Cf/ZL109 hybrid-reinforced aluminum matrix composites reached 324 MPa and 343 MPa, respectively, 93.3% and 55.5% higher than those of the matrix alloy.