Cao Zheng, An Shengli, Song Xiwen
School of Metallurgy and Ecological Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Beijing, 100083, China.
Inner Mongolia Key Laboratory of Advanced Ceramic Materialss and Devices, Inner Mongolia University of Science and Technology, 7 Arding Street, Baotou, 014010, China.
Sci Rep. 2022 Jun 15;12(1):9955. doi: 10.1038/s41598-022-13705-0.
YO doped ZrO (YSZ) ceramic material is used to protect alloy components worked in high-temperature. But its phase transformation between tetragonal phase and monoclinic phase occurred at 1150 °C leads to YSZ invalid. Therefore, enhancing the phase stability of YSZ is necessary for meeting the demands of the development of thermal barrier coatings (TBC). In this study, X-ray diffraction and Raman spectra were used to explore the phase stability and phase transformation of YbO and YO co-doped ZrO (YbYSZ) ceramics after heat treatment at 1300 °C with different times. The stability of tetragonal phase is improved by tetragonality decreasing with Yb doped. Simultaneously, the incorporation of Yb leads to O-O coupling, which is beneficial for increasing the concentration of oxygen vacancies near the substituted ions, thereby improving the stability of the crystal. The 6.5YbYSZ ceramic has the best stability after heat treatment at 1300 °C for different times.
钇掺杂的氧化锆（YSZ）陶瓷材料用于保护在高温下工作的合金部件。但其在1150°C时发生的四方相和单斜相之间的相变会导致YSZ失效。因此，提高YSZ的相稳定性对于满足热障涂层（TBC）发展的需求是必要的。在本研究中，利用X射线衍射和拉曼光谱来探究不同时间在1300°C热处理后YbO和YO共掺杂的氧化锆（YbYSZ）陶瓷的相稳定性和相变。随着Yb掺杂四方度降低，四方相的稳定性得到提高。同时，Yb的掺入导致O - O耦合，这有利于增加取代离子附近氧空位的浓度，从而提高晶体的稳定性。6.5YbYSZ陶瓷在1300°C不同时间热处理后具有最佳稳定性。
