Publicaties

The current research explores the influence of multi-asperity abrasive particles engagement on multiphase materials. WC-Co (WC-15.6% Co) and NbC-cermet (NbC-12% Ni-10% Mo2C) hard materials were tested using a scale down single point scratch tester. Multi-asperity scratch patterns were produced by implying multiple scratches on hardmetal surface by parallel and repeated sliding. Superimposition of interactions has been implemented to study the ...

The wear behaviour of two martensitic and one multiphase steel targeted for abrasion and erosion applications in agriculture and mining industry were investigated in three abrasive test systems with different complexity. Scratch tests were performed with different indenter radii, shapes, and loads. The material behaviour was also investigated in multi-asperity contact systems. Pin-on-disc tests were performed with various loads and abrasive ...

Steel making companies are developing new steels with complex microstructure to satisfy abrasion resistance issues. Three newly developed steels (fresh martensitic, tempered martensitic and a TRIP steel) were investigated under single and multi-asperity abrasion test conditions. Abrasive performance was linked to material properties. In the multi-asperity test, increasing the normal load and abrasive particle size resulted in increasing mass ...

Abrasive wear due to particles sliding along a surface (two-body abrasion) or in between two surfaces (three-body abrasion) often leads to early failure of machine components exposed to, e.g., slurry, sand, wear debris, and so on. The primary cause for failure due to abrasive wear is the interaction between abrasive particles and the material surface. Simulation of an entire abrasive system is complicated and involves several challenges. ...

Synergism is noted to expedite the material degradation kinetics in wear-corrosion systems. Over the years, many wear-corrosion contact configurations have been explored to grade materials in application oriented environments. Current investigation focuses on quantifying the synergy of abrasion-corrosion in a two-body abrasive wear configuration where abrasive particles interact with metal counter surface, conforming to ASTM G132. Two abrasion ...

The present research aims at understanding the tribological behaviour of advanced unsaturated polyester/vinyl ester based thermoset composites reinforced by inorganic (mineral-based) or organic (vegetal) fibres such as basalt and jute. These fibres are non-toxic and widely available in nature. Thermosets have limitations in the formation of a uniform transfer layer during sliding wear. To surpass these limitations, tribo-fillers such as ...

The success of an orthopedic implant therapy depends on successful bone integration and the prevention of microbial infections. In this work, plasma electrolytic oxidation (PEO) was performed to deposit TiO2 coatings enriched with Ca, P, and Ag on titanium to improve its surface properties and antibacterial blasts efficacy while maintaining normal biological functions and thus to enhance the performance of orthopedic implants. After PEO ...

In this study, Ni bonded NbC cermets, i.e., NbC-xNi-18WC-14Ti(C0.7,N0.3) (wt%) with a Ni from 6 to 20wt%, were prepared by liquid phase sintering in vacuum for 90 min at 1390 or 1450 °C. Microstructuralinvestigation was performed by SEM and XRD analysis. The phase composition in the cermets weresimulated by thermodynamic modelling. All cermets were fully densified. Microstructure and phaseanalysis indicated that the NbC based cermets were ...

The influence of up to 15 vol% WC addition to Ni bonded NbC cermets was assessed by conventionalpressureless liquid phase sintering in vacuum for 90 min at 1390 °C. The constituent phases and Wdistribution in the Ni binder and NbC phase were simulated by thermodynamic modelling.Microstructure and phase analysis using XRD and SEM indicated that the WC-modified NbC basedcermets were composed of an (Nb, W)C solid solution cubic phase dispersed in a ...