Abstract
Gd2Zr2O7 has been considered as a promising thermal barrier coating candidate, but its toughness and thermal expansion coefficient (TEC) need to be improved. In this study, Gd2 − xZr2 + xO7 + x/2 (x = 0, 0.1, 0.3, 0.5, 0.7) compounds were produced to improve the toughness and enlarge the TEC. Gd2Zr2O7 and Gd1.9Zr2.1O7.05 exhibited pyrochlore structure, while Gd2 − xZr2 + xO7 + x/2 (x = 0.3, 0.5, 0.7) consisted of pyrochlore and t'-ZrO2 phases. With increasing ZrO2 content, the pyrochlore in the compounds had decreased lattice parameter, and its ordering degree decreased when x ≤ 0.3, then it almost kept unchanged with higher ZrO2 content. Among the Gd2 − xZr2 + xO7 + x/2 ceramics investigated, the toughness of the compounds increased with increasing ZrO2 content, while Gd1.7Zr2.3O7.15 exhibited the largest TEC. The related mechanisms were discussed in detail.
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.
