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<p>Composites produced using the centrifugal gelcasting (CGC) method have an axially symmetrical shape with a hole in the axis. The top layer of the composite is rich in metallic components, while the inner layer is made entirely of ceramics. Between the outer and inner zones of such a pipe element, there is a gradual change in the share of the metallic phase. It was found that the local properties, measured along the structural gradient, depended on the content of Ni particles and changed accordingly in individual zones. The Ni content leads to reduced hardness and improved fracture toughness. The hardness of the external surface exceeds 10 GPa, with a crack resistance of 6.2 MPa·m<sup>0.5</sup>, and in the inner layer, it is 19.6 GPa, with a crack resistance of 3.9 MPa·m<sup>0.5</sup>. The samples have a comprehensive strength of 99.06&#xa0;MPa.</p>

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Fabrication and characterization of Al₂O₃-Ni gradient composites for aggressive substance transport using centrifugal gelcasting

  • 期刊论文

  • 发表日期：

    2026年5月30日

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  • Justyna Zygmuntowicz,
  • Joanna Tańska,
  • Paulina Wiecińska,
  • Paulina Piotrkiewicz,
  • Katarzyna Konopka,
  • Mikołaj Szafran,
  • Marcin Wachowski,
  • Janusz Torzewski,
  • Waldemar Kaszuwara

摘要

Composites produced using the centrifugal gelcasting (CGC) method have an axially symmetrical shape with a hole in the axis. The top layer of the composite is rich in metallic components, while the inner layer is made entirely of ceramics. Between the outer and inner zones of such a pipe element, there is a gradual change in the share of the metallic phase. It was found that the local properties, measured along the structural gradient, depended on the content of Ni particles and changed accordingly in individual zones. The Ni content leads to reduced hardness and improved fracture toughness. The hardness of the external surface exceeds 10 GPa, with a crack resistance of 6.2 MPa·m0.5, and in the inner layer, it is 19.6 GPa, with a crack resistance of 3.9 MPa·m0.5. The samples have a comprehensive strength of 99.06 MPa.