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<p>To achieve instantaneous brittle fracture of Sn-52In-1Bi alloy (melting point of 113.8 ~ 115.2&#xa0;°C) under high-pressure, a ceramic skeleton of 3&#xa0;mol.% yttria-stabilized tetragonal zirconia polycrystal (3Y-TZP) bioinspired bamboo-joint-like features is designed and fabricated using stereolithography appearance (SLA) technique. This design is combined with metal casting technique to produce a composite material with high-pressure brittle fracture characteristics and low melting point. The results indicate that, under the condition of maintaining the same composition of the low-melting-point alloy, the compressive strength for brittle fracture of the composite material can be regulated within the range of 60.35 ~ 129.46&#xa0;MPa by systematic controlling of the number, location, and spatial distribution of rib pores. Finite element analysis (FEA) reveals that the edges of rib pore serve as primary stress concentration regions. Meanwhile, x-ray computed tomography (CT) is employed to test and observe the compressed samples, which verifies the damage evolution mechanism wherein cracks are preferentially initiated from rib pore edges and propagate along the thin-walled direction.</p>

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Study on the Design and Performance Regulation of 3Y-TZP Ceramic Skeleton–Alloy Composite

  • 期刊论文

  • 发表日期：

    2026年7月2日

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  • Fang Luo,
  • Danfeng Xuan,
  • Hejie Li,
  • Panpan Zhang,
  • Rong Liu,
  • Zhenzhen Yang

摘要

To achieve instantaneous brittle fracture of Sn-52In-1Bi alloy (melting point of 113.8 ~ 115.2 °C) under high-pressure, a ceramic skeleton of 3 mol.% yttria-stabilized tetragonal zirconia polycrystal (3Y-TZP) bioinspired bamboo-joint-like features is designed and fabricated using stereolithography appearance (SLA) technique. This design is combined with metal casting technique to produce a composite material with high-pressure brittle fracture characteristics and low melting point. The results indicate that, under the condition of maintaining the same composition of the low-melting-point alloy, the compressive strength for brittle fracture of the composite material can be regulated within the range of 60.35 ~ 129.46 MPa by systematic controlling of the number, location, and spatial distribution of rib pores. Finite element analysis (FEA) reveals that the edges of rib pore serve as primary stress concentration regions. Meanwhile, x-ray computed tomography (CT) is employed to test and observe the compressed samples, which verifies the damage evolution mechanism wherein cracks are preferentially initiated from rib pore edges and propagate along the thin-walled direction.