Study the influence of size and shape of silica fillers in polymer composites on the tribolayer formation
Study the influence of size and shape of silica fillers in polymer composites on the tribolayer formation
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DOI：
10.15544/balttrib.2019.04
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
A. Dmitriev;B. Jim;B. Wetzel
中科院分区：
文献类型：
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作者：
A. Dmitriev;B. Jim;B. Wetzel
本文综述了聚合物复合材料中二氧化硅颗粒的大小和形状对滑动条件下转移膜形成的影响。在可移动元胞自动机方法的框架内，研究了二氧化硅纳米颗粒尺寸的影响。为此，建立了含二氧化硅纳米夹杂物的聚合物复合材料局部接触面积的数值模型。结果表明，为保证聚合物基复合材料的低摩擦性能，选用尺寸与基材微观形貌特征尺寸相当的颗粒。估算了对偶体上凹槽的参数，这些参数有助于形成稳定的摩擦膜。此外，还进行了碳纤维、球形纳米二氧化硅和不规则微米二氧化硅填充的环氧树脂对100Cr6轴承钢的干滑动磨损试验。结果表明，碳纤维和白炭黑填充的环氧基材料的转移膜分布最均匀，摩擦磨损性能最好。
This study reviews the effect of the size and shape of silica particles in polymer composites on transfer film formation under sliding conditions. Within the framework of movable cellular automata method the influence of the size of silica nanoparticles is exanimated. For this the numerical model of the local contact area of the polymer composite with silica nanoinclusions is developed. It is shown that in order to ensure the low friction properties of polymer composite, particles whose sizes are comparable with the characteristic size of the substrate microprofile are preferred. The parameters of the recesses on the counterbody are estimated, which contribute to the formation of a stable tribofilm. Additionally, experimental dry sliding wear tests of epoxy compounds filled with carbon fibers and spherical nanosilica or irregular shaped microsilica, were conducted against 100Cr6 bearing steel. The results show that the epoxy material filled with carbon fibers and fumed silica yields the most evenly distributed transfer film formation as well as the best friction and wear properties.