Abstract
A wet‐chemical approach is applied to derive fine powders with compositions 11 mol% CeO2‐ZrO2, 1 mol% YO1.5‐10 mol% CeO2‐ZrO2, 12 mol% CeO2‐ZrO2, and 2 mol% YO1.5‐10 mol% CeO2‐ZrO2 by the coprecipitation method. The characteristics of the as‐derived powders are evaluated through thermal analysis and electron microscopy. The sintering behavior of the calcined powders is carried out at 1400° and 1500°C for 1 to 10 h. Sintered density higher than 98% of theoretical is achieved for sintering at 1400°C for several hours. The as‐sintered density dependence on the sintering condition is related to the extent of tetragonal‐to‐monoclinic phase transformation as well as the associated microcracks. Partial substitution by Y2O3 in CeO2‐ZrO2 results in reduced grain size and tends to stabilize the tetragonal structure. Y2O3 is more effective than CeO2 with respect to the grain size refinement and tetragonal stability. In addition, Y2O3 substitution in CeO2‐ZrO2 increases the hardness, while it decreases the fracture toughness.
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.
