Abstract
HVOF-sprayed ceramic coatings can be considered as potential candidates
for applications where good chemical and corrosion resistance of ceramics is
needed.Due to the less porous structure of the HVOF-sprayed coating as
compared to the plasma sprayed one, the protection capability of the coating
is increased.Despite the dense structure, the coating properties are inferior
as compared to bulk ceramics because of pores and microcracks, which influence
adversely the coating properties (i.e., toughness, hardness and wear
resistance).Improved mechanical properties have widely been demonstrated for
bulk nanocrystalline materials.Especially with ceramic materials the
decreasing of grain size has been found to be favorable.Dense nanostructured
ceramic coatings containing various nanostructured particles were manufactured
by HVOF-spraying by using an HV-2000 spray gun.Mechanical properties,
especially elastic modulus and relative fracture toughness, were studied.The
techniques used were instrumented nanoindentation and KIC evaluation.As a
result coatings with nearly 100% improvements in relative fracture toughness
were produced for nanoreinforced composite coating.
| Original language | English |
|---|---|
| Title of host publication | Applied Material Research at VTT |
| Subtitle of host publication | Symposium on Applied Materials |
| Place of Publication | Espoo |
| Publisher | VTT Technical Research Centre of Finland |
| Pages | 188-199 |
| ISBN (Electronic) | 951-38-6312-3 |
| ISBN (Print) | 951-38-6311-5 |
| Publication status | Published - 2006 |
| MoE publication type | B3 Non-refereed article in conference proceedings |
| Event | Internal Symposium on Applied Materials - Espoo, Finland Duration: 8 Jun 2006 → 8 Jun 2006 |
Publication series
| Series | VTT Symposium |
|---|---|
| Number | 244 |
| ISSN | 0357-9387 |
Conference
| Conference | Internal Symposium on Applied Materials |
|---|---|
| Country | Finland |
| City | Espoo |
| Period | 8/06/06 → 8/06/06 |
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Cite this
Turunen, E., Varis, T., Gustafsson, T. E., Keskinen, J., Lintunen, P., Lintula, P., & Hannula, S-P. (2006). Improved mechanical properties by nanoreinforced HVOF-sprayed ceramic composite coatings. In Applied Material Research at VTT: Symposium on Applied Materials (pp. 188-199). VTT Technical Research Centre of Finland. VTT Symposium, No. 244 http://www.vtt.fi/inf/pdf/symposiums/2006/S244.pdf