In the present study, effects of the sliding velocity sequences on the friction and wear properties of pure polyetheretherketone (PEEK) and a PEEK hybrid composite were studied. It is demonstrated that the tribological properties of pure PEEK and its composite show a complex nature of the dependence on the velocity sequences in the studied range. The friction coefficient of PEEK is independent on previous velocity histories. In contrast, the testing sequence of the velocity exerts obvious impact on the friction coefficient of the PEEK composite at slow sliding velocities. With respect to the wear performance, the specific wear rate of pure PEEK exhibits a strong dependence on the sequences of the velocity only at the initial pv-levels. For the PEEK composite, its specific wear rate exhibits an obvious dependence on the previous velocity levels at a low nominal pressure of 1 MPa. When the pressure is increased to 8 MPa, the impact of the velocity sequences on the wear performance becomes insignificant. In addition, the tribological properties clearly correlate with the temperature of the tribosystem.

Graphical Abstract

中文翻译：

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速度序列对PEEK基材料摩擦和磨损性能的影响

在本研究中，研究了滑动速度序列对纯聚醚醚酮（PEEK）和PEEK杂化复合材料的摩擦磨损性能的影响。结果表明，纯PEEK及其复合材料的摩擦学性能显示出其在所研究范围内对速度序列的依赖的复杂性质。PEEK的摩擦系数与先前的速度历史无关。相反，在缓慢的滑动速度下，速度的测试顺序对PEEK复合材料的摩擦系数产生了明显的影响。关于磨损性能，纯PEEK的比磨损率仅在初始pv水平下才显示出对速度序列的强烈依赖性。对于PEEK复合材料，在1 MPa的低公称压力下，其比磨损率表现出对先前速度水平的明显依赖。当压力增加到8 MPa时，速度序列对磨损性能的影响就不明显了。另外，摩擦学性质与摩擦系统的温度明显相关。

图形概要