| Titre : |
Bond strength of hybrid sol-gel coatings with different additives |
| Type de document : |
texte imprimé |
| Auteurs : |
Mousa May, Auteur ; Heming Wang, Auteur ; Robert Akid, Auteur |
| Année de publication : |
2013 |
| Article en page(s) : |
p. 407-413 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Adhésion
Alumine
Dioxyde de titane
Microscopie
Microscopie électronique à balayage
Nanoparticules
Polyaniline
Revêtements
Sol-gel, Procédé
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
The hybrid sol–gel coating on Al 2024-T3 was modified by adding polyaniline, TiO2, or γ-Al2O3 nanoparticles in the formulation separately. The coating was then used as an adhesive to bond Al 2024-T3 alloys, forming a single lap joint. The bond strength of the sol–gel coating was investigated using a universal tensile test machine. The lap shear strength of the original sol–gel coating was about 1.38 MPa and it was increased up to 2.26 MPa after the modification by adding 0.05 wt% PANI microparticles in the sol–gel coating. The small increase in strength was attributed to an improvement in its adhesive flexibility because of incorporation of the long-chain organic polymer in its structure. Furthermore, the addition of different amounts of TiO2 nanoparticles in the unmodified sol–gel coating also led to an increase in shear strength compared to the undoped sol–gel coating. Typically, a sol–gel coating containing 2.0 wt% of TiO2 recorded the highest adhesive strength of about 4.0 MPa. A similar increase in strength was observed when doping γ-Al2O3 nanoparticles into the original hybrid sol–gel coating. Adding 0.5 wt% of γ-Al2O3 in the sol–gel coating increased the adhesive bonding strength up to 4.48 MPa. The fracture surface of the specimen was separately observed by SEM and Optical Microscopy in order to examine potential evidences of mechanism and nature of failure. The reason why the adhesive strength increased after the modification of the sol–gel coating is discussed in this article. |
| Note de contenu : |
- EXPERIMENTAL WORK : Materials - Preparation of adhesion samples - Adhesion strength measurements
- RESULTS AND DISCUSSION : Bond strength of hybrid sol-gel coatings
- EFFECTS OF DIFFERENT ADDITIVES ON THE SOL-GEL ADHESIVE STRENGTH : Doping 0.05% PANI - Effects of the addition of TiO2 nanoparticules - Effects of the addition of γ-Al2O3 nanoparticles - FTIR characterization of the fracture surface |
| DOI : |
10.1007/s11998-012-9450-6 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9450-6.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18739 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 3 (05/2013) . - p. 407-413
Aller sur edunet
Accueil
Bond strength of hybrid sol-gel coatings with different additives in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 3 (05/2013)
