Effects of n-Al2O3 and μ-TiCN on Microstructure and Mechanical Properties of Al2O3 Composite Ceramics Manufactured by Material Extrusion and Photo-Polymerization Combined Process

Alumina (Al2O3) composite ceramics with different composition ratio and particle-size distribution were fabricated by the material extrusion photo-polymerization combined process (MEX-PPM) based on additive-manufacturing (AM) technology in our previous work. These particles nanosized Al2O3 (n-Al2O3), micron-sized TiCN (μ-TiCN) Al2O3. Effects of n-Al2O3 μ-TiCN investigated characterizing volume density, EDS spectrum, mechanical properties microstructure prepared samples. It was found that had a significant effect hardness ceramics, μ-TiCN, excellent performance flexural strength fracture toughness. The optimum contents 10 wt % 30 showed good properties. Their porosity density at 4.073% 4.177 g/cm3, respectively. hardness, toughness 16.592 GPa, 592.875 MPa 6.308 MPa/mm2. significantly higher than SLA document (178.84 ± 17.66 MPa), which great potential high-pressure structure.