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首页> 外文期刊>Polymers for advanced technologies >Comparative study of the effects of nano-sized and micro-sized CF and PTFE on the thermal and tribological properties of PEEK composites
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Comparative study of the effects of nano-sized and micro-sized CF and PTFE on the thermal and tribological properties of PEEK composites

机译：纳米尺寸和微大型CF和PTFE对PEEK复合材料热敏性摩擦学特性的比较研究

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摘要

The tribological characteristics of PEEK composites fretting against GCr 15 steel were investigated by a SRV-IV oscillating reciprocating ball-on-disk tribometer. In order to clarify the effect of type and size of fillers on the properties of PEEK composites, nano-sized and micro-sized CF and PTFE fillers were added to the PEEK matrix. The thermal conductivity, hardness, and fretting wear properties of PEEK composites reinforced by CF or PTFE were comparatively studied. The results showed that the type and size of the fillers have an important effect on both the friction coefficient and wear rate, by affecting their thermal conductivity, hardness, as well as the surface areas of their transfer films. In comparison, the effect on improving the tribological properties of micro-sized CF was superior to that of nano-sized CF, while the effect of nano-sized PTFE was superior to that of micro-sized PTFE. Considering the acceptable friction coefficient and wear rate of the composite under the fretting wear test, it seemed that 4% nCF, 20% mCF, 2% nPTFE and 10% mPTFE were desired additive proportions. And it also can be found that during the fretting wear test, the abrasive and adhesive wear resulted in accumulative debris at the contacting surface. The transfer films made of debris were formed on the counterfaces.
机译：用SRV-IV型往复球盘式摩擦磨损试验机研究了PEEK复合材料在GCr 15钢表面的微动摩擦磨损特性。为了阐明填料类型和尺寸对PEEK复合材料性能的影响，在PEEK基体中添加了纳米和微米尺寸的CF和PTFE填料。对比研究了CF和PTFE增强PEEK复合材料的导热系数、硬度和微动磨损性能。结果表明，填料的类型和尺寸通过影响其导热系数、硬度以及转移膜的表面积，对摩擦系数和磨损率都有重要影响。相比之下，微米碳纤维的摩擦学性能改善效果优于纳米碳纤维，而纳米聚四氟乙烯的摩擦学性能改善效果优于微米聚四氟乙烯。考虑到微动磨损试验下复合材料的可接受摩擦系数和磨损率，4%nCF、20%mCF、2%nPTFE和10%mPTFE似乎是理想的添加剂比例。微动磨损试验中，磨粒磨损和粘着磨损导致接触表面堆积磨屑。由碎屑制成的转移膜形成在对立面上。

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