稀土氧化物在Al2O3耐磨陶瓷中的应用研究现状

Research status of rare earth oxides used in Al2O3 wear-resistant ceramics

  • 摘要: 在Al2O3陶瓷中掺杂稀土氧化物会影响其耐磨性能。为了拓宽稀土氧化物的应用范围,根据掺杂稀土氧化物影响Al2O3陶瓷耐磨性能的相关研究,总结了稀土氧化物在Al2O3耐磨陶瓷中的应用现状。首先,概述Al2O3陶瓷耐磨性能的影响因素; 其次,介绍稀土氧化物对Al2O3陶瓷耐磨性能的影响及作用机理; 最后,展望稀土氧化物未来在Al2O3耐磨陶瓷中的研究与发展方向。结果表明: 不同的稀土氧化物会对Al2O3陶瓷的耐磨性能产生不同的影响,但并非所有的稀土氧化物掺杂后都能提高Al2O3陶瓷的耐磨性能。掺杂Y2O3、La2O3、CeO2、Nd2O3、Sm2O3、Tb4O7、Yb2O3、Gd2O3、Er2O3和Lu2O3等一元或多元稀土氧化物会产生积极影响,其中Gd2O3、Er2O3和Lu2O3 3种稀土氧化物在更低掺杂量时可使Al2O3陶瓷表现出最佳耐磨性能; 相反,掺杂Eu2O3、Ho2O3和Tm2O3等稀土氧化物后会对Al2O3陶瓷的耐磨性能产生负面影响。因此,在Al2O3耐磨陶瓷的设计和生产中,选择合适的稀土氧化物对制备高耐磨产品至关重要。

     

    Abstract: Rare earth oxides mainly exist in nature in the form of minerals. Doping rare earth oxides into Al2O3 ceramics can affect their wear resistance. In order to broaden the application scope of rare earth oxides, this paper summarizes the current status of rare earth oxides used in Al2O3 wear-resistant ceramics based on relevant research on the influence of doped rare earth oxides on the wear resistance of Al2O3 ceramics. Firstly, the influencing factors of the wear resistance of Al2O3 ceramics are summarized. Secondly, the influence and mechanism of rare earth oxides on the wear resistance of Al2O3 ceramics are introduced. Finally, the future research and development directions of rare earth oxides used in Al2O3 wear-resistant ceramics are prospected. The results show that different rare earth oxides have different effects on the wear resistance of Al2O3 ceramics, but not all the doped rare earth oxides can improve the wear resistance of Al2O3 ceramics. The doping of one component or multi component rare earth oxides, such as Y2O3, La2O3, CeO2, Nd2O3, Sm2O3, Tb4O7, Yb2O3, Gd2O3, Er2O3, and Lu2O3, has a positive effect on the wear resistance of Al2O3 ceramics, among which Gd2O3, Er2O3, and Lu2O3 can enable Al2O3 ceramics to exhibit the best wear resistance at lower doping levels; on the contrary, the doping of rare earth oxides, such as Eu2O3, Ho2O3, and Tm2O3, has a negative impact on the wear resistance of Al2O3 ceramics. Therefore, for the design and production of Al2O3 wear-resistant ceramics, it is crucial to choose suitable rare earth oxides for the preparation of high wear-resistant products.

     

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