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<p>This study comprehensively investigated the microstructural, mechanical properties and sintering behaviour of Al<sub>2</sub>O<sub>3</sub>-TiC-ZrO<sub>2</sub> (ATZ) composites doped with rare earth oxides (Er<sub>2</sub>O<sub>3</sub>, Yb<sub>2</sub>O<sub>3</sub>, Y<sub>2</sub>O<sub>3</sub>, CeO<sub>2</sub> and Sm<sub>2</sub>O<sub>3</sub>) and produced with the low-pressure spark plasma sintering (SPS) method. CeO<sub>2</sub>-doped composite decreases the sintering temperature by about 6% compared to other composites. It was observed that the CeO<sub>2</sub>-doped composite increased fracture toughness by nearly 10% compared to other composites. Compared with the undoped commercial ATZ product, it was observed that almost the same fracture toughness was obtained at a lower sintering temperature. As a result, CeO<sub>2</sub> and Sm<sub>2</sub>O<sub>3</sub> were determined as promising additives in developing energy-efficient and high-performance Al<sub>2</sub>O<sub>3</sub>-TiC-ZrO<sub>2</sub> composites for advanced engineering applications.</p>

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Fabrication of rare earth oxide-doped Al2O3/TiC/ZrO2 ceramic composites via low-pressure SPS

  • 期刊论文

  • 发表日期：

    2026年2月9日

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  • Ahmet Oğuzhan Turhan,
  • Alpagut Kara

摘要

This study comprehensively investigated the microstructural, mechanical properties and sintering behaviour of Al2O3-TiC-ZrO2 (ATZ) composites doped with rare earth oxides (Er2O3, Yb2O3, Y2O3, CeO2 and Sm2O3) and produced with the low-pressure spark plasma sintering (SPS) method. CeO2-doped composite decreases the sintering temperature by about 6% compared to other composites. It was observed that the CeO2-doped composite increased fracture toughness by nearly 10% compared to other composites. Compared with the undoped commercial ATZ product, it was observed that almost the same fracture toughness was obtained at a lower sintering temperature. As a result, CeO2 and Sm2O3 were determined as promising additives in developing energy-efficient and high-performance Al2O3-TiC-ZrO2 composites for advanced engineering applications.