A5066398859- Lubricants and Their Additives
- Tribology and Wear Analysis
- Metal and Thin Film Mechanics
- Tribology and Lubrication Engineering
- Adhesion, Friction, and Surface Interactions
- Diamond and Carbon-based Materials Research
- Laser Material Processing Techniques
- High voltage insulation and dielectric phenomena
- MXene and MAX Phase Materials
- Advanced Surface Polishing Techniques
- Electrical Contact Performance and Analysis
- Advanced Sensor and Energy Harvesting Materials
- Dielectric materials and actuators
- Advanced materials and composites
- Force Microscopy Techniques and Applications
- Gear and Bearing Dynamics Analysis
- Smart Materials for Construction
- Conducting polymers and applications
- Mechanical and Optical Resonators
- Analytical Chemistry and Sensors
Czech Technical University in Prague
2019-2023
University of Ljubljana
2016-2017
Study of friction and energy dissipation always relied on direct observations. Actual theories provide limited prediction the frictional dissipative properties if only material chemistry geometry are known. We here develop a framework to study intrinsic based knowledge normal modes system at equilibrium. derive an approximated expression for first anharmonic term in potential expansion which does not require computation third-order force constants. Moreover, we show how characterize...
Transition metal dichalcogenide (TMD)-based coatings are known for their low friction performance, which is attributed to the formation of a tribolayer consisting almost exclusively pure well-ordered TMD. However, such and its wear track coverage still unknown. In this study, we employed surface mapping nanotribological techniques study properties tracks composite W-S-C coatings. Our analysis revealed that as-deposited coating consisted two phases, with significantly different nanoscale...
Abstract The surface dielectric properties of acid‐etched low‐density polyethylene ( LDPE ) were analysed in the frequency range from 20 Hz to 200 kHz . Samples treated with various acids for a period one hour, at temperatures ranging 70 °C. After treatment, samples Fourier transform infrared spectroscopy, revealing chemical and crystallinity changes on surface, as direct result treatment. sample surfaces using atomic force microscopy. micrographs show that acid treatment increases roughness...
This study describes the possibility of dielectric characterization initial stages ageing in an low-density polyethylene (LDPE) + graphite composite, which is not possible using standard method spectroscopy.It shown that differences between delay angles, #$ = $ TRI -%$ SIN , obtained triangular and sinusoidal excitations on composite samples, shows a maximum, at same time position this maximum more sensitivity to changes electrical properties material caused by than other parameters.In order...
The laser texturing is an established method for enhancing the PVD coatings tribological performance. To achieve this enhancement, two different strategies can be applied: a of substrates before deposition coating, or deposited coating. Technological and economical problems tuning parameters types substrate significantly eliminated by already coated substrates. Nerveless, effect structural changes caused ablation on friction performance not well studied. In work, we investigated differences...
Abstract The enhancement of functional surfaces by laser texturing has been investigated in many studies; however, it often applied to the substrate. New technologies, such as direct writing (DLW) method using a femtosecond laser, allow production extremely precise textures into both substrates and thin films. This paper investigates two distinct methods producing various textures: (i) substrate is textured before deposition diamond-like carbon coating (DLC), (ii) texture produced DLC...