Delqué, Mélissa (2007) Influence of microstructure on the tribological behaviour of composite coatings obtained by plasma spraying. PhD thesis Sciences et génie des matériaux, MAT- Centre des Matériaux P.M. Fourt, ENSMP p.178.
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Abstract
Due to their processing, the microstructure of coatings achieved by plasma spraying is intricate. To optimize the tribological behaviour of plasma-sprayed composite coatings, relationships between microstructure and tribological properties had to be established. Coatings exhibiting different microstructures were obtained using two processes, i.e. a coupled spraying mode, High-Pressure Plasma Spraying (HPPS) and Reactive Plasma Spraying (RPS), and Co-spraying. Various parameters were studied: sprayed metallic powders (titanium or copper alloys), ceramic particle addition, spraying mode and spraying conditions for every process. A local approach to mechanical characteristics of the various phases in the sprayed composite coatings was also developed using nanoindentation. Dry sliding “pin-on-disc” testing of two specimens for both spraying processes was carried out. From this testing, the influence of major microstructural features of these composite coatings on wear/friction mechanisms could be determined. Microscopic observation and quantitative analysis of the tested specimens led to the identification of wear mechanisms common to these two types of plasma-sprayed composite coatings. The influence of coating microstructure on tribological properties was especially studied.
| Item Type: | PhD Thesis (PhD) |
|---|---|
| Thesis Supervisor: | Jeandin, Michel |
| Date: | 26 June 2007 |
| Board of examiners: | Houdy, P. and Costil, S. and Vannes, A.b. and Aubert, P. and Gras, R. and Pasgrimaud, A. and Guipont, V. and Jeandin, M. |
| Ecole Doctorale: | ED 432 ECOLE DOCTORALE SCIENCES DES METIERS DE L'INGENIEUR |
| Discipline: | Sciences et génie des matériaux |
| Collection (Fonds): | ENSMP |
| Institution: | ENSMP |
| Department: | MAT- Centre des Matériaux P.M. Fourt |
| Subjects: | 4. Materials Science, Mechanics and Mechanical Engineering |
| Uncontrolled Keywords: | Wear of materials, Composite, Revêtement, Projection plasma, Microstructure, Co-projection, Projection plasma réactive, Projection en surpression, Tribologie, Usure, Tribofilm, Nanoindentation |
Table of content
Nomenclature
Introduction générale
Chapitre 1 Eléménts bibliographiques
1. Revêtements composites projetés
2. Tribologie des revêtements composites projetés plasma
3. Conclusion
Chapitre 2 Matériaux et techniques expérimentales
1. Matériaux
2. Procédé d'élaboration des revêtements
3. Méthodes de caractérisation des revêtements
Chapitre 3 Elaboration de dépôts composites par projection plasma
1. Choix des matériaux et des procédés pour l'élaboration de dépôts composites
2. Elaboration de depôts composites à structure particulaire
3. Elaboration de depôts composites à structure lamellaire
4. Conclusion
Chapitre 4 Etude tribologique des épôts composites projetés plasma
1. Etude tribologique des dépôts composites à structure particulaire
2. Etude tribologique des dépôts composites à structure lamellaire
3. Conclusion
Chapitre 5 Mécanismes d'usure des dépôts composites projetés plasma
1. Mécanismes d'usure communs aux dépôts composites
2. Influence de la microstructure des dépôts composites à comportement tribologique
3. Conclusion
Conclusion générale
Annexes
Références bibliographiques
Publications
| ID Code: | 3565 |
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| Deposited By: | Odile ADAM |
| Deposited On: | 09 April 2008 |
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