Al2O3–ZrO2–Y2O3 composite coatings were prepared by plasma spraying Al2O3–ZrO2 composite powder with varying amounts of Y2O3. The effects of Y2O3 on the microstructure and properties of the plasma-sprayed Al2O3–ZrO2 composite coatings were investigated, and the results showed that the composition of the composite powder had a significant influence on the microstructure and properties of the Al2O3–ZrO2–Y2O3 coatings. The Al2O3–ZrO2 and Al2O3–ZrO2–Y2O3 coatings were composed of yttria-stabilized zirconia (YSZ), α-Al2O3, and γ-Al2O3. The Al2O3–ZrO2–Y2O3 coating had a lower friction coefficient and wear rate compared with the Al2O3–ZrO2 coating. The Al2O3–ZrO2–Y2O3 coating showed the most uniform and compact microstructure, highest microhardness, good toughness, and adhesive strength when 3 wt.%Y2O3 was added. This method of adding rare-earth Y2O3 to improve the overall performance of Al2O3–ZrO2 coatings has potential application value.

中文翻译：

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等离子喷涂Al2O3-ZrO2-Y2O3复合涂层的组织与性能

Al2O3-ZrO2-Y2O3 复合涂层是通过等离子喷涂 Al2O3-ZrO2 复合粉末与不同量的 Y2O3 制备的。研究了Y2O3对等离子喷涂Al2O3-ZrO2复合涂层微观结构和性能的影响，结果表明复合粉末的成分对Al2O3-ZrO2-Y2O3涂层的微观结构和性能有显着影响. Al2O3-ZrO2 和 Al2O3-ZrO2-Y2O3 涂层由氧化钇稳定氧化锆 (YSZ)、α-Al2O3 和 γ-Al2O3 组成。与 Al2O3-ZrO2 涂层相比，Al2O3-ZrO2-Y2O3 涂层具有较低的摩擦系数和磨损率。当添加 3 wt.% Y2O3 时，Al2O3-ZrO2-Y2O3 涂层显示出最均匀和致密的微观结构、最高的显微硬度、良好的韧性和粘合强度。