Nano diesel soot particles reduce wear and friction performance using an oil additive on a laser textured surface

Abstract

Tribological properties of nano diesel soot (DS) as an additive were investigated. Textures in linear radiating arrays were prepared on the surface of a spring-steel plate by laser radiation. The texture densities were 19.6%, 22.1%, and 44.2%, and the depth was 30 μm. The results indicated that the textured surface was interacted with additive favorably to improve its tribological performance. Friction coefficients and wear rates of textured surfaces with additive in oil were generally much lower compared to the original surface without additive. The higher area density of the textured surface with the additive in oil had the lowest friction coefficient, as low as 0.12, and also the minimum wear rate, as low as 1 × 103 μm/N·m in 100 °C, to be achievable. Such results can be attributed to the formation of the tribo-film and the storage function of the micro-dimple.