Ce of DLN films in ambient air has been attributed to interfacial Ziritaxestat Inhibitor sliding

April 24, 2022

Ce of DLN films in ambient air has been attributed to interfacial Ziritaxestat Inhibitor sliding among the DLN film and graphitizedCoatings 2021, 11, 1203. https://doi.org/10.3390/coatingshttps://www.mdpi.com/journal/coatingsCoatings 2021, 11,two oftribofilm formed on the ball counterface [11,12], confirmed also by later tribological research of DLN films [157]. Of great interest would be the friction and wear TCEP custom synthesis Properties of DLN films under the conditions altering the graphitized tribofilm formation, e.g., under liquid (water, oil) lubrication, at elevated temperatures, which would extend the functional capabilities from the coatings. Owing to low internal stresses [7], it’s possible to generate DLN films of somewhat significant thickness (as much as ten ), retaining the hardness and elastic properties [7,19,20], which enables a laser surface texturing (LST) approach to become applied for further improvements of friction and put on properties of DLN coatings [16,20]. It was the modest thickness (of 1 ) that strongly restricted the laser surface texturing of DLC films in early experiments of lubricated sliding, when the DLC film deposition onto laser-textured steel or silicon substrates had been proposed as an option texturing strategy for DLC-coated surfaces [214]. This strategy, alternative to direct laser surface texturing of DLC films, had disadvantages coping with the want of mechanical polishing of laser-textured substrates before deposition of thin DLC films (to take away protruding rims about dimples) [21,23], and weaker adhesion of DLC coatings at the dimple edges major for the film delamination during sliding [22]. Recently, femtosecond (fs) laser processing of DLN films has been demonstrated as an efficient strategy to manage the friction properties at the nano, micro, and macroscale [16,20,257] and to enhance tribological properties of laser-textured DLN films in lubricated sliding [16,26]. Most of the crucial findings for fs-laser-textured DLN films are connected to normal patterns of parallel microgrooves and arrays of microcraters fabricated beneath particular irradiation situations limited to a provided structure size of ten (groove width, crater diameter), structure depth of some microns and period of 20 . Further optimization of laser surface texturing of DLN films is necessary, aiming at fabrication of microstructures of reduce size and larger aspect ratio, and increase in the throughput of microprocessing with high spatial precision. In this paper we concentrate on the effects of environments and laser surface texturing on tribological performance of DLN coatings. Firstly, we present the results of comparative tribological testing of DLN films in humid air and water below linear reciprocating sliding against steel and silicon-nitride balls, and demonstrate the friction pair-dependent put on character with the rubbing supplies below water lubrication. Secondly, we present experimental information of high-precision surface texturing of DLN films with fs-laser pulses and fabrication of microcrater-based structures of hexagonal geometry, followed by tribological testing of the laser-textured DLN samples below oil lubrication at space temperature and 100 C. In addition, we demonstrate how the nano-/microfriction behavior is changed inside the laser-structured location consisting of microcraters applying friction force microscopy in humid air. 2. Components and Solutions 2.1. DLN Film Properties DLN films had been grown on silicon and steel substrates applying a plasma-assisted chemical vapor deposition (PAC.