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<p>TiCN-HfC/TiCN–WC–Cr<sub>3</sub>C<sub>2</sub> laminated ceramics with a novel structure-wave layer were fabricated by vacuum hot-press sintering technology. Effects of the wave cycle number (WCN) on their microstructure and mechanical properties were studied. The results showed that crack deflection, crack bridging, both transgranular and intergranular fracture, and dispersion of HfC particles were observed. With the WCN increased, the mechanical properties of the THTWCLCs initially rose and then declined, in addition to the upward trend in the interlaminar shear strength (ISS). The increase in the ISS was attributed to the interlocking of peaks and troughs in adjacent layers and the expansion of the interface bonding area. When the WCN was 10, the ceramics exhibited better mechanical properties: 1104 ± 17&#xa0;MPa for its bending strength, 8.61 ± 0.17&#xa0;MPa‧m<sup>1/2</sup> for its fracture toughness, 21.41 ± 0.24&#xa0;GPa for its Vickers hardness. This study provided a promising way of designing and fabricating laminated ceramics with different inner layers.</p>

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Fabrication of TiCN–HfC/TiCN–WC–Cr3C2 laminated ceramics with a novel structure—wave layers

  • 期刊论文

  • 发表日期：

    2025年6月2日

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  • Changlong Lu,
  • Jiaojiao Gao,
  • Jinpeng Song,
  • Zhuo Wang,
  • Jian Zhao

摘要

TiCN-HfC/TiCN–WC–Cr3C2 laminated ceramics with a novel structure-wave layer were fabricated by vacuum hot-press sintering technology. Effects of the wave cycle number (WCN) on their microstructure and mechanical properties were studied. The results showed that crack deflection, crack bridging, both transgranular and intergranular fracture, and dispersion of HfC particles were observed. With the WCN increased, the mechanical properties of the THTWCLCs initially rose and then declined, in addition to the upward trend in the interlaminar shear strength (ISS). The increase in the ISS was attributed to the interlocking of peaks and troughs in adjacent layers and the expansion of the interface bonding area. When the WCN was 10, the ceramics exhibited better mechanical properties: 1104 ± 17 MPa for its bending strength, 8.61 ± 0.17 MPa‧m1/2 for its fracture toughness, 21.41 ± 0.24 GPa for its Vickers hardness. This study provided a promising way of designing and fabricating laminated ceramics with different inner layers.