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<p>Multiphase ceramics exhibit excellent high-temperature stability. However, due to limitations imposed by conventional solid-phase ceramic fabrication methods, they are prone to inhomogeneous phase distribution and high-temperature cracking in the final products. In this study, a photocurable Si₃N₄/ZrC ceramic precursor was synthesized through a molecular design approach. This photocurable ceramic precursor was mixed with modified SiC powder. By optimizing both the photocuring and LCD 3D printing parameters, we successfully fabricated novel Si₃N₄/ZrC/SiC ternary ceramic green bodies via the precursor conversion route. The sintering profile was optimized according to thermogravimetric analysis. The sintered samples were characterized using techniques including SEM, XRD, and EDS to evaluate grain growth, interfacial bonding state, and pore size distribution. The influence of the ZrC phase on the microstructural evolution, densification behavior, and room-temperature flexural strength was discussed based on the experimental evidence. Ultimately, a dense Si₃N₄/ZrC/SiC ternary ceramic material exhibiting a homogeneous distribution of nano- or submicron-scale multiphase grains was successfully prepared.</p>

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Study on the Preparation of Si3N4/ZrC/SiC Ternary Ceramics Based on Photocurable 3D Printing Polymer Precursors

  • 期刊论文

  • 发表日期：

    2026年5月13日

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  • Mengwei Zhang,
  • Ai Tao,
  • Mingkai Xu,
  • Yixiao Meng

摘要

Multiphase ceramics exhibit excellent high-temperature stability. However, due to limitations imposed by conventional solid-phase ceramic fabrication methods, they are prone to inhomogeneous phase distribution and high-temperature cracking in the final products. In this study, a photocurable Si₃N₄/ZrC ceramic precursor was synthesized through a molecular design approach. This photocurable ceramic precursor was mixed with modified SiC powder. By optimizing both the photocuring and LCD 3D printing parameters, we successfully fabricated novel Si₃N₄/ZrC/SiC ternary ceramic green bodies via the precursor conversion route. The sintering profile was optimized according to thermogravimetric analysis. The sintered samples were characterized using techniques including SEM, XRD, and EDS to evaluate grain growth, interfacial bonding state, and pore size distribution. The influence of the ZrC phase on the microstructural evolution, densification behavior, and room-temperature flexural strength was discussed based on the experimental evidence. Ultimately, a dense Si₃N₄/ZrC/SiC ternary ceramic material exhibiting a homogeneous distribution of nano- or submicron-scale multiphase grains was successfully prepared.