ABSTRACT For the first time, the Cr–CeO2 / La2O3 composite has been electrochemically deposited in a sulphate Cr (III) bath with an oxalate complexing agent. XRD analysis revealed that incorporation of CeO2/La2O3 particles into the Cr matrix does not change its state and the Cr matrix remains fine-crystalline (crystallites size < 1 nm). The cross-section SEM and EDS analysis confirmed the incorporation of CeO2/La2O3 particles into the Cr matrix. The studies of the mechanical properties of the Cr–CeO2/La2O3 composite have shown that the hardness of the composite increases over that of the Cr deposit due to CeO2/La2O3 particles incorporation, while both the friction coefficient and wear rate decrease. The mechanism of CeO2/La2O3 nanoparticles incorporation into the Cr matrix has been discussed.

中文翻译：

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一种在硫酸盐 Cr(III) 浴中电沉积的新型 Cr–CeO2/La2O3 纳米复合材料

摘要 Cr-CeO2 / La2O3 复合材料首次在硫酸盐 Cr (III) 浴中与草酸盐络合剂进行电化学沉积。XRD 分析表明，将 CeO2/La2O3 颗粒掺入 Cr 基体不会改变其状态，并且 Cr 基体保持细晶（微晶尺寸 < 1 nm）。横截面 SEM 和 EDS 分析证实了 CeO2/La2O3 颗粒掺入到 Cr 基质中。Cr-CeO2/La2O3 复合材料的力学性能研究表明，由于 CeO2/La2O3 颗粒的掺入，复合材料的硬度高于 Cr 沉积物的硬度，而摩擦系数和磨损率均降低。已经讨论了 CeO2/La2O3 纳米颗粒掺入 Cr 基体的机制。