Abstract
Multilayer Si3N4/SiC composite with interwoven interfaces was designed and prepared via the aqueous tape casting and gas pressure sintering process. This composite had relatively uniform layer thickness, high strength (~564MPa), toughness (~16.8MPam1/2) and work-of-fracture (~4411J/m2). The first-level toughening mechanism started from the fracture surface of the multilayer composite. Obvious crack deflection was found in the Si3N4 and SiC layers. At the same time, the pullout and fractured rodlike β-Si3N4 grains were detected along the interfaces of the composite. The growth of the rodlike β-Si3N4 grains (the grain size>50μm) along the interfaces was determined by the vapor phase transport mechanism. Both rich SiO2 on the surfaces of the SiC/Si3N4 particles and high porosity of the SiC layers were contributed to the growth of β-Si3N4 grains.
Sign-in/Register to access full text options 
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.
