Improving the tribological properties of ZrO2(Y2O3)-graphite composites at high temperature through three-dimensional continuous structure
Improving the tribological properties of ZrO2(Y2O3)-graphite composites at high temperature through three-dimensional continuous structure
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DOI：
10.1016/j.triboint.2023.108841
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发表时间：
2023-07
影响因子：
6.2
通讯作者：
Peng-yu Lin;Junjie Song;Xin You;Q. Sun;Tao Li;Jiaxin Si;Haifeng Wang;Litian Hu;Yongsheng Zhang
中科院分区：
文献类型：
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作者：
Peng-yu Lin;Junjie Song;Xin You;Q. Sun;Tao Li;Jiaxin Si;Haifeng Wang;Litian Hu;Yongsheng Zhang
采用石墨和ZrO 2（Y2 O3）核壳结构制备了具有三维连续结构的ZrO 2（Y2 O3）-石墨复合材料。从室温到700 °C，研究了结构对减摩抗磨机理的影响。成分均匀的ZrO 2（Y2 O3）-石墨复合材料在高温摩擦条件下的磨损机制主要为磨粒磨损和脆性断裂。对于具有三维结构的复合材料，具有高承载能力的连续ZrO 2基体和致密的自润滑、抗热氧化摩擦层的形成显著提高了复合材料的摩擦学性能，在600 °C下与GH4169合金偶联时，摩擦系数降低了约10%，磨损率降低了近两个数量级。
ZrO2(Y2O3)-graphite composites with a three-dimensional (3D) continuous structure were prepared by using a core-shell design of graphite and ZrO2(Y2O3). The effect of structure on the friction-reducing and anti-wear mechanisms from room temperature to 700 °C was investigated. During high-temperature friction, abrasive wear and brittle fracture are the main wear mechanisms for ZrO2(Y2O3)-graphite composites with homogeneous composition. For the composites with 3D structure, the continuous ZrO2matrix with high load-carrying capacity and the formation of a dense friction layer with self-lubricating and thermal oxidation resistance improve the tribological properties significantly, reducing the coefficient of friction by about 10% and the wear rate by nearly two orders of magnitude when coupled with GH4169 alloys at 600 °C.