16 documents found, page 1 of 2
Nitrogen alloyed MoSe2 coatings – Role of optimized morphology, structure and m...
Fernandes, Filipe; Yaqub, Talha Bin; Nadeem, Irfan; Yaqoob, Khurram; Kalin, Mitjan; Cavaleiro, AlbanoTransition metal dichalcogenide (TMD) coatings are gaining increasing interest among the scientific community as eco-friendly solutions for reducing friction, improving energy conservation, and lowering carbon footprints. N-alloyed MoSe2 coatings (MoSeN), a subset of TMDs, remain largely underexplored, with no research on their frictional performance across various sliding environments. Herein, an in-depth anal...
Tribological Comparison of Coatings Produced by PVD Sputtering for Application ...
Ferreira, Ney Francisco; Neis, Patric Daniel; Fernandes, Filipe; Poletto, Jean Carlos; Yaqub, Talha Bin; Cavaleiro, Albano; Vilhena, LuísThis article compares the tribological performance of coatings produced by PVD sputtering. Transition metal dichalcogenide (TMD) coatings doped with carbon (WSC and MoSeC) and nitrogen (WSN and MoSeN) and a conventional diamond-like carbon (DLC) coating are compared. The tribological evaluation was oriented towards the use of coatings on piston rings. Block-on-ring tests in a condition lubricated with an additi...
Insights into the oxidation resistance mechanism and tribological behaviors of ...
Ju, Hongbo; Athmani, Moussa; Luan, Jing; Al-Rjoub, Abbas M.K.; Cavaleiro, Albano; Yaqub, Talha Bin; Chala, Abdelouahad; Ferreira, FábioIn the last decades, vanadium alloyed coatings have been introduced as potential candidates for self-lubrication due to their perfect tribological properties. In this work, the influence of V incorporation on the wear performance and oxidation resistance of TiSiN/CrN film coatings deposited by direct current (DC) reactive magnetron sputtering is investigated. The results show that vanadium incorporation signifi...
Superior macro-scale tribological performance of steel contacts based on graphe...
Nadeem, Irfan; Malok, Matjaž; Kovač, Janez; Yaqub, Talha Bin; Carvalho, Albano Augusto Cavaleiro Rodrigues de; Kalin, MitjanReducing friction is one of the best ways to lower energy consumption and make processes more environmentally friendly. Because of the growing interest in green lubricants, we investigated the synergetic effects of graphene quantum dots (GQDs) combined with aqueous glycerol to improve the lubrication performance of self-mated steel contacts in reciprocating sliding motion. As a comparison, the lubrication perfo...
Insights into the oxidation resistance mechanism and tribological behaviors of ...
Ju, Hongbo; Athmani, Moussa; Luan, Jing; AL-Rjoub, Abbas; Cavaleiro, Albano; Yaqub, Talha Bin; Chala, Abdelouahad; Ferreira, Fabio; Fernandes, FilipeIn the last decades, vanadium alloyed coatings have been introduced as potential candidates for self-lubrication due to their perfect tribological properties. In this work, the influence of V incorporation on the wear performance and oxidation resistance of TiSiN/CrN film coatings deposited by direct current (DC) reactive magnetron sputtering is investigated. The results show that vanadium incorporation signifi...
Design and development of NbTiVZr porous high entropy alloys for energy applica...
Siddique, Ayesha; Abid, Talha; Akram, M. Aftab; Yaqub, Talha Bin; Karim, M. Ramzan Abdul; Fernandes, Filipe; Khan, Rizwan; Yaqoob, KhurramPorous NbTiVZr refractory high entropy alloys have been developed by a novel method that is based on the addition of yttrium to the base high entropy alloy and its subsequent removal by electrochemical dealloying process. Microstructure and crystal structure characterization of as-cast alloys confirmed the segregation of yttrium at interdendritic regions. Successful removal of yttrium from interdendritic region...
Development of eutectic high entropy alloy by addition of W to CoCrFeNi HEA
Abdullah, M.; Mukarram, Muhammad; Yaqub, Talha Bin; Fernandes, Filipe; Yaqoob, KhurramHigh entropy alloys have shown a remarkable combination of physical and mechanical properties. The introduction of eutectic microstructure, consisting of a tough fcc phase, and a hard-intermetallic phase, can help in obtaining even better synergy of strength and ductility. The presence of multiple principal alloying elements in HEAs and absence of corresponding multicomponent phase diagrams makes designing of e...
Exploring the industrial implementation of W–S–N coatings: a detailed study of ...
Yaqub, Talha Bin; Al-Rjoub, Abbas M.K.; Cavaleiro, Albano; Fernandes, Filipe DanielThe work presents a detailed analysis of the synthesis, compositional, morphological, structural, mechanical and diverse atmosphere sliding characteristics of reactive sputtered W–S–N coatings. The aim is to perform an organized study to explore the sliding performance in three different environments (room temperature, 200 °C and dry N2) and disseminate the results to promote the application of TMD-N coatings f...
Effect of Annealing Heat Treatment on the Composition, Morphology, Structure an...
Yaqub, Talha Bin; Al-Rjoub, Abbas; Khalid, Hafiza Ayesha; Yaqoob, Khurram; Fernandes, Filipe; Cavaleiro, AlbanoAlloyed-transition metal dichalcogenide (TMD) coatings have been under investigation as multi-environment lubricants for the past few decades. These coatings display very low coefficient of friction properties at elevated temperatures. Studies on the annealing of these low-friction coatings are missing in the literature. For the first time, in this study, the annealing of the W-S-N dry lubricant coatings was ca...
The influence of V addition on the structure, mechanical properties, and oxidat...
AL-Rjoub, A.; Yaqub, Talha Bin; Cavaleiro, A.; Fernandes, FilipeThe influence of V content on the morphology, structure, hardness (H) and reduced Young's modulus (E), adhesion, and oxidation resistance of TiAlSiN coatings is investigated. The coatings were produced by DC reactive magnetron sputtering, with increasing V contents from 0, 4.8 and 11.0 at.%. All coatings exhibit a fcc type structure. The coating with 4.8 at.% of V shows the highest values of H and E, whereas th...