Abstract
ABSTRACTIn this study, porous β-Si3N4 ceramics containing different types of sintering additives (Yb2O3 and Lu2O3) were produced successfully by addition of PMMA (0 to 40 vol%) and pressureless sintering. The effects of PMMA content and different types of sintering additives (Yb2O3 and Lu2O3) on the microstructure and mechanical properties of the Si3N4 ceramics was studied. Porous Si3N4 ceramics with 5 wt% Yb2O3-doping had better mechanical properties than the ceramics with 5 wt% Lu2O3-doping. The flexural strength and fracture toughness of the porous Si3N4 ceramics with 5 wt% Yb2O3-doping were in ranges from 349 to 109 MPa and 6.8 to 3.8 MPa·m1/2 with porosity of 15-37%. With the increase of the porosity, the flexural strength and fracture toughness all decreased.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
