| Téléchargement | - Voir le manuscrit accepté : From APS to HVOF spraying of conventional and nanostructured titania feedstock powders : A study on the enhancement of the mechanical properties (PDF, 1.4 Mio)
|
|---|
| DOI | Trouver le DOI : https://doi.org/10.1016/j.surfcoat.2004.10.137 |
|---|
| Auteur | Rechercher : Lima, R. S.1; Rechercher : Marple, B. R.1 |
|---|
| Affiliation | - Conseil national de recherches du Canada. Institut des matériaux industriels du CNRC
|
|---|
| Format | Texte, Article |
|---|
| Sujet | abrasive wheel test; bond strength test (ASTM C633); scanning electron microscopy (SEM); thermal spraying; titanium oxide; nanostructured coating |
|---|
| Résumé | Nanostructured and conventional titania (TiO2) feedstocks were thermal sprayed using air plasma spray (APS) and high-velocity oxy-fuel (HVOF). The HVOF-sprayed coatings made from the nanostructured feedstock exhibited superior abrasion resistance, bond strength and crack propagation resistance when compared to the coatings made from the conventional feedstocks sprayed using HVOF and APS. The enhancement of the mechanical properties was due to (i) the processing (HVOF) and (ii) the nanocharacter of the feedstock. It was found that the HVOF-sprayed coating made from the nanostructured feedstock exhibited isotropic characteristics and microstructure with tiny zones of agglomerated nanostructured particles randomly spread throughout the coating structure. It was observed that these nanostructured zones acted as crack arresters by blunting and branching crack tips, enhancing the crack propagation resistance of the coating. Due to the isotropic characteristics of mechanical properties, the HVOF-sprayed coating made from the nanostructured feedstock exhibited uniform crack propagation under Vickers indentation, i.e., four cracks emanating from the corners of the Vickers indentation impression. |
|---|
| Date de publication | 2006-03-15 |
|---|
| Dans | |
|---|
| Langue | anglais |
|---|
| Publications évaluées par des pairs | Oui |
|---|
| Numéro du CNRC | NRCC 46948 |
|---|
| Numéro NPARC | 15861567 |
|---|
| Exporter la notice | Exporter en format RIS |
|---|
| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
|---|
| Identificateur de l’enregistrement | 209a11de-b05c-4ce8-9e9d-8f6cc1102144 |
|---|
| Enregistrement créé | 2010-07-30 |
|---|
| Enregistrement modifié | 2020-04-22 |
|---|
