Effect of the varied load conditions on the tribological performance and the thermal characteristics of PEEK-based hybrid composites
Effect of the varied load conditions on the tribological performance and the thermal characteristics of PEEK-based hybrid composites
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DOI：
10.1016/j.triboint.2016.04.025
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发表时间：
2016-09-01
影响因子：
6.2
通讯作者：
Schlarb, Alois K.
中科院分区：
文献类型：
--
作者：
Lin, Leyu;Schlarb, Alois K.
在不改变聚合物试样和配对体的情况下，在一次滑动磨损试验中使用速度增加方法来表征PEEK和多尺度颗粒填充PEEK的摩擦磨损行为。结果表明，不同填料的加入显著改善了PEEK的摩擦学性能，特别是在较低的载荷条件下，如在pv为4 MPa、0.5 ~ 4 m/s的条件下，加入刚性填料后，PEEK的平均比磨损率从19 mm（3）N-1 m（-1）降低到0.42 mm（3）N-1 m（-1），PEEK复合材料的摩擦系数最低，约为0.1。另外，增速试验得到的PEEK和PEEK复合材料的摩擦系数和磨损率与等速试验结果相近，说明增速技术在高分子材料摩擦学性能研究中的成功应用，可以显著减少时间和材料费用。最后，基于磨损表面的观察，除了主体和配对体之间的颗粒的滚动效果和由于通过引入刚性颗粒改善基体刚度而减轻SCF上的应力集中之外，还观察到颗粒对SCF的额外保护作用。颗粒在纤维前聚集，减少了对合体与SCF的直接接触，从而减轻了纤维的剥离和去除。(C)2016爱思唯尔有限公司版权所有。
The friction and wear behavior of PEEK and a multi-scale particle filled PEEK was characterized by using a velocity increasing approach during one sliding wear test without changing of polymer specimen and counterbody. The results derived demonstrated that the incorporation of various fillers remarkably improved the tribological performance of PEEK, especially under severer load conditions, e.g. under a pv-condition of 4 MPa and 0.5-4 m/s, the mean specific wear rate reduced from 19 mm(3) N-1 m(-1) to 0.42 mm(3) N-1 m(-1) after incorporation of rigid fillers, and similarly, the lowest friction coefficient was obtained from PEEK composite, which is about 0.1. In addition, similar friction coefficients and wear rates of PEEK and PEEK composite are gained from velocity increasing tests compared to those evaluated from constant velocity tests, which means that the successful application of the velocity increasing technique in the investigation of the tribological performance of polymer materials can obviously reduce the time and material expenses. Finally, based on the observations of the worn surface, in addition to the rolling effect of the particles between body and counterbody and the alleviation of stress concentration on the SCFs due to improvement of the matrix stiffness by incorporating rigid particles, an additional protective effect of particles on the SCFs was observed. The particles accumulate in front of the fibers, which reduces the direct contact between the counterbody and SCF, and therefore, the debonding and removals of fibers were alleviated. (C) 2016 Elsevier Ltd. All rights reserved.