SiN bioceramics were fabricated using GPS and SPS method with MgO-REO (RE = La, Nd, Gd, Ho and Lu) sintering additives. The effect of sintering methods and sintering additives on the grain growth, mechanical, antimicrobial properties and color of SiN bioceramics were studied. Samples sintered with GPS are composed of β-SiN and samples sintered with SPS are composed of α-SiN and β-SiN. The growth of β-SiN grains in samples sintered with GPS are more adequate. Samples sintered with GPS exhibit a S. aureus inactivation rate up to 98% and a bright color appearance with a hardness of about 13 GPa and a fracture toughness up to 7.5 MPa m, suitable for dental implants. And samples sintered with SPS exhibit a hardness of about 17 GPa and a fracture toughness about 6 MPa m.
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| http://dx.doi.org/10.1016/j.jmbbm.2024.106529 | DOI Listing |
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