Effect of plasma treatment on the tribological and adhesion performance of a polymer coating deposited on different metallic substrates / Ahmed F. Abdelaal in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 6 (11/2022)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 6 (11/2022) . - p. 1673-1686 Titre : Effect of plasma treatment on the tribological and adhesion performance of a polymer coating deposited on different metallic substrates Type de document : texte imprimé Auteurs : Ahmed F. Abdelaal, Auteur ; M. Abdul Samad, Auteur ; Akeem Yusuf Adesina, Auteur ; M. M. A. Baig, Auteur Année de publication : 2022 Article en page(s) : p. 1673-1686 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion Epaisseur -- Mesure Métaux -- Revêtements poudre Polyéthylène à ultra haut poids moléculaire Revêtements organiques Rugosité Technique des plasmas Traîtements de surface Tribologie (technologie) Usure (mécanique) Index. décimale : 667.9 Revêtements et enduits Résumé : Plasma treatment is a technique accepted universally for improving the adhesion of coatings to substrates because of its ease of use, environmental friendliness, and its adaptability. Hence, this research aims to further explore this technique and specifically investigate the effect of air–plasma treatment of different substrates (stainless steel, copper, brass, titanium, and aluminum) on the adhesion and tribological properties of an ultra-high molecular weight polyethylene polymer coating deposited on them. Several characterization techniques such as X-ray photoelectron spectroscopy, water contact angle, and roughness measurements are conducted to evaluate the surfaces before and after air–plasma treatment. Results showed that UHMWPE coating deposited on the plasma-treated stainless steel substrates demonstrated the best adhesion and tribological properties. This was attributed to the improved oxidation effect and the carbon cleaning effect of the plasma treatment on the stainless steel substrates as compared to other substrates. DOI : https://doi.org/10.1007/s11998-022-00639-5 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00639-5.pdf?pdf=button% [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38489 [article]

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Mechanical, thermal, and surface properties of fusion-bonded epoxy nanocomposite coatings / Baha Demir in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 4 (07/2023)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 4 (07/2023) . - p. 1489-1498 Titre : Mechanical, thermal, and surface properties of fusion-bonded epoxy nanocomposite coatings Type de document : texte imprimé Auteurs : Baha Demir, Auteur ; Ahmed F. Abdelaal, Auteur ; Mirza Murtuza, Auteur ; Ali Baig, Auteur ; Abdul Samad Mohammed, Auteur Année de publication : 2023 Article en page(s) : p. 1489-1498 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alumine Angle de contact Charges (matériaux) Dioxyde de titane Epaisseur -- Mesure Epoxydes Graphène Le graphène est un cristal bidimensionnel (monoplan) de carbone dont l'empilement constitue le graphite. Il a été isolé en 2004 par Andre Geim, du département de physique de l'université de Manchester, qui a reçu pour cette découverte le prix Nobel de physique en 2010 avec Konstantin Novoselov. Il peut être produit de deux manières : par extraction mécanique du graphite (graphène exfolié) dont la technique a été mise au point en 2004, ou par chauffage d'un cristal de carbure de silicium, qui permet la libération des atomes de silicium (graphène epitaxié). Record en conduction thermique jusqu'à 5300 W.m-1.K-1. C'est aussi un matériaux conducteur. Mesure Nanoparticules Nanotubes Oxyde de cérium Revêtement époxy lié par fusion Revêtements -- Propriétés mécaniques Revêtements -- Propriétés thermiques Revêtements organiques Thermocinétique Titane Index. décimale : 667.9 Revêtements et enduits Résumé : Epoxy coatings have generally been used in applications that require the surfaces to be protected against corrosion. However, their use in demanding applications wherein the contacting surfaces are required to be protected against wear and tear has been limited due to their inferior mechanical and thermal properties. To overcome this challenge, epoxy composite coatings came into being, wherein the epoxy resin is reinforced with different fillers. However, due to the availability of a large variety of fillers, the selection of a suitable filler and the amount to be used in the epoxy resin for the best properties still remains a challenge. Hence, the focus of this research is to compare the performance of five different fillers, viz. carbon nanotubes (CNTs), graphene (GO), alumina (Al2O3), titanium dioxide (TiO2), and ceria (CeO2) in enhancing the mechanical, thermal, and surface properties of epoxy coatings. The five fillers selected covered the spectrum of carbon based, ceramic, and metallic oxide fillers. Different loadings (0.5, 1.5, and 3 wt%) of each of the fillers were used to fabricate fusion-bonded epoxy composite coatings on mild steel coupons using an electrostatic spray gun. The effect of these fillers was evaluated on the hardness, thermal conductivity, and water contact angle of the epoxy composite coatings. It was observed from the results that 0.5 wt% of Al2O3 was found to be the best-performing filler among all the fillers in terms of higher hardness and 3 wt% of Al2O3 was best in terms of thermal conductivity as compared to the pristine epoxy coatings and other epoxy composite coatings. Note de contenu : - EXPERIMENTAL PROCEDURES : - Powder preparation - Coating preparation - Microhardness - Surface properties - Thermal conductivity - Scanning electron microscopy (SEM) - Coating thickness measurements - RESULTS AND DISCUSSION : - SEM evaluation of the morphology of the different epoxy nanocomposite coatings - Effect of different loadings of different fillers on the hardness of the epoxy nanocomposite coatings - Effect of different loadings of different fillers on the thermal conductivity of the epoxy nanocomposite coatings - Effect of different loadings of different fillers on the surface roughness of the epoxy nanocomposite coatings - Effect of different loadings of different fillers on the water contact angle of the epoxy nanocomposite coatings - The best-performing filler in terms of hardness and thermal conductivity - Table 1 Surface roughness measurements of CNT, GO, ceria, TiO2, and Al2O3 at weight percent from 0.5, 1.5 to 3% in μm - Table 2 Water contact angle measurements of CNT, GO, ceria, TiO2, and Al2O3 at weight percents from 0.5, 1.5 to 3% in degrees DOI : https://doi.org/10.1007/s11998-022-00760-z En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00760-z.pdf?pdf=button% [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39731 [article]

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