Cubic‐stabilized zirconia ceramic composites have been synthesized by conventional sintering, starting from commercial m‐ZrO₂, Y₂O₃, and waste‐derived magnesium aluminate spinel (MA) powders. In this work, the effect of sintering temperature and MA content on stabilization and densification properties of YSZ have been duly considered. MA‐free YSZ0 composite sintered at 1600°C‐1700°C revealed m‐ and t‐ZrO₂ dual‐phase structure where its m‐ZrO₂ was partially stabilized upon temperature rising into tetragonal phase by Y³⁺ diffusion inside zirconia structure. YSZ10‐50 composites containing 10‐50 wt% MA demonstrated dissimilar behavior where their m‐ZrO₂ was transformed and stabilized into a cubic form by diffusion of Y³⁺, Mg⁺², and Al⁺³ inside zirconia lattice. Furthermore, densification of YSZ10‐50 powder mixtures by conventional sintering at 1600°C for 2 hours resulted in fully dense compacts with micrometer‐sized grains. The outcomes indicate that MA has a significant effect on m‐ZrO₂ stabilization into the cubic phase structure at room temperature. In this respect, this study offers huge potentials for developing fully stabilized c‐ZrO₂ ceramics that could be possibly used as industrial ceramics for structural applications of harsh chemical and thermal environmental conditions.

中文翻译：

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废MA尖晶石对部分稳定的双相氧化锆的烧结和稳定行为的影响

立方稳定的氧化锆陶瓷复合材料是通过常规烧结合成的，起始于商业m-ZrO ₂，Y ₂ O ₃和废铝酸铝尖晶石（MA）粉末。在这项工作中，已经适当考虑了烧结温度和MA含量对YSZ稳定和致密化性能的影响。在1600°C-1700°C烧结的不含MA的YSZ0复合材料显示出m-和t-ZrO ₂双相结构，其中，由于氧化锆结构内Y ^3+的扩散，其m-ZrO ₂在温度升高成四方相时部分稳定。含有10-50 wt％MA的YSZ10-50复合材料的m-ZrO ₂表现出不同的行为通过在氧化锆晶格中扩散Y ³⁺，Mg ⁺²和Al ⁺³，将其转变并稳定为立方体形式。此外，通过在1600°C下常规烧结2小时对YSZ10-50粉末混合物进行致密化，可得到具有微米级晶粒的完全致密的压坯。结果表明，MA对室温下m-ZrO ₂稳定进入立方相结构具有重要影响。在这一方面，这项研究为开发完全稳定的c-ZrO ₂陶瓷提供了巨大的潜力，该陶瓷可能用作苛刻的化学和热环境条件下的结构应用的工业陶瓷。