Abstract

Zirconia–mullite composites were prepared from beach sand sillimanite in the presence of magnesia as an additive. The raw materials were attrition milled. Samples were isostatically pressed and sintered in the temperature range of 1500–1600 °C with 2 h of soaking. The resulting composites were characterized in terms of densification, thermal expansion, martensite start ( M s) temperature. The presence of magnesia changes the value of thermal expansion coefficient. The mechanical and thermomechanical properties, namely flexural strength and thermal spalling of the sintered composites, were characterized and effect of magnesia on it is discussed. The microstructural characterization of the sintered samples through scanning electron microscopy has shown that mullite and zirconia are the two major phases in the microstructure.

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 call

Disclaimer: 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.