Formation and function mechanisms of nanostructured tribofilms of epoxy-based hybrid nanocomposites
Formation and function mechanisms of nanostructured tribofilms of epoxy-based hybrid nanocomposites
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DOI：
10.1016/j.wear.2015.08.025
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发表时间：
2015-11
期刊：
影响因子：
5
通讯作者：
Ga Zhang;I. Häusler;W. Österle;B. Wetzel;B. Jim
中科院分区：
文献类型：
--
作者：
Ga Zhang;I. Häusler;W. Österle;B. Wetzel;B. Jim
研究了短碳纤维（SCF）和不同体积分数单分散二氧化硅纳米颗粒填充环氧树脂（EP）复合材料摩擦膜的纳米结构和性能。在高温条件下，仅填充SCF的常规复合材料在钢表面形成氧化铁层。即使只添加0.05%的纳米二氧化硅，也会导致摩擦膜的结构和复合材料的摩擦学性能发生显著变化。随着硅含量的增加，钢表面的氧化层逐渐被硅基摩擦膜所取代。结果表明，摩擦膜的结构与复合材料的摩擦学性能密切相关。二氧化硅纳米颗粒与其他磨损产物的混合、可能的反应和摩擦烧结被认为是导致二氧化硅基摩擦膜形成和润滑的主要机制。
The nanostructures and properties of the tribofilms of epoxy (EP) composites filled with short carbon fibers (SCF) and different volume fractions of monodisperse silica nanoparticles were investigated. When the conventional composite filled only with SCF was considered under a highpvcondition, an iron oxide layer is formed on the steel counterface. The addition of even only 0.05 vol% nano-silica leads to a significant change of the tribofilm’s structure and the tribological behavior of the composite. With increasing silica content, the oxidation layer on the steel surface is gradually replaced by a silica-based tribofilm. A close relationship between the tribofilms’ structure and the tribological behavior of the composites was identified. Mixing, possible reactions and tribo-sintering of silica nanoparticles with other wear products are deemed to be main mechanisms inducing the formation and the lubricity of the silica-based tribofilm.