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<p>SiC<sub>3D</sub>/7050 Al interpenetrating phase composites have been fabricated by infiltrating a 7050 Al alloy solution into a three-dimensional SiC reticulated foam (SiC<sub>3D</sub>) with 30 pores per inch via a pressureless infiltration method. The microstructure and effects of the load on the dry tribological properties of the SiC<sub>3D</sub>/7050 Al composites were investigated, and they demonstrated that the SiC<sub>3D</sub>/7050 Al composites, fabricated at 850°C for 2 h, exhibited a complex double-interpenetrating structure, where the triangular hollow pores of the SiC<sub>3D</sub> were filled with 7050 Al alloy. A significant reduction in the wear rate was observed for SiC<sub>3D</sub>/7050 Al. The wear rate increased slightly from 1.49 × 10<sup>-13</sup> m<sup>3</sup>/(N·m) to 1.74 × 10<sup>-13</sup> m<sup>3</sup>/(N·m) as the load increased from 20 N to 100 N. SiC<sub>3D</sub>/7050Al exhibited a significantly lower wear rate compared to 7050 Al at various loads. At a load of 60 N, SiC<sub>3D</sub>/7050 Al demonstrated the lowest wear rate, where the formation of a mechanically mixed layer on the worn surface was found to control both the wear rate (δ) and the friction coefficient (μ) of SiC<sub>3D</sub>/7050 Al composites.</p>

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Fabrication, Microstructure, and Effects of Load on Dry Tribological Properties of SiC3D/7050 Al Interpenetrating Phase Composites

  • 期刊论文

  • 发表日期：

    2025年6月3日

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  • Yan Li Jiang,
  • Yi Chao Li,
  • Feng Jun Jin,
  • Jing Jing Xu,
  • Si Chen,
  • Shu Heng Gao,
  • Liang Yu

摘要

SiC3D/7050 Al interpenetrating phase composites have been fabricated by infiltrating a 7050 Al alloy solution into a three-dimensional SiC reticulated foam (SiC3D) with 30 pores per inch via a pressureless infiltration method. The microstructure and effects of the load on the dry tribological properties of the SiC3D/7050 Al composites were investigated, and they demonstrated that the SiC3D/7050 Al composites, fabricated at 850°C for 2 h, exhibited a complex double-interpenetrating structure, where the triangular hollow pores of the SiC3D were filled with 7050 Al alloy. A significant reduction in the wear rate was observed for SiC3D/7050 Al. The wear rate increased slightly from 1.49 × 10-13 m3/(N·m) to 1.74 × 10-13 m3/(N·m) as the load increased from 20 N to 100 N. SiC3D/7050Al exhibited a significantly lower wear rate compared to 7050 Al at various loads. At a load of 60 N, SiC3D/7050 Al demonstrated the lowest wear rate, where the formation of a mechanically mixed layer on the worn surface was found to control both the wear rate (δ) and the friction coefficient (μ) of SiC3D/7050 Al composites.