Results 181 to 190 of about 8,523 (209)

Nanostructured Ceramic HVOF Coatings for Improved Protection

International Thermal Spray Conference, 2007
Abstract The potential of the high velocity oxy-fuel (HVOF) thermal spray process to produce coatings with reduced porosity is well known. The ability to produce high density ceramic coatings offers potential in high performance applications in the fields of wear, corrosion resistance and dielectric coatings.
Turunen, Erja, Kanerva, Ulla, Varis, Tommi, Knuuttila, J., Leivo, J., Silvonen, J.   +5 more
openaire   +2 more sources

Residual stresses in HVOF-sprayed ceramic coatings

Surface and Coatings Technology, 2008
In this paper, the residual stress state of thermally sprayed ceramic coatings was examined by combining different experimental and analytical techniques, in order to provide a thorough characterisation of through-thickness stress profiles and a cross-verification of results. HVOF-sprayed ceramics, manufactured using commercial and nanostructured Al2O3
Bolelli, Giovanni, Lusvarghi, Luca, Varis, Tommi, Turunen, Erja, Leoni, Matteo, Scardi, Paolo, Azanza-Ricardo, Cristy Leanor, Barletta, Massimilano   +8 more
openaire   +5 more sources

Standard HVOF Process Compared to the HVOF Process for Internal Coating with Fine Powders

International Thermal Spray Conference, 2008
Abstract The main argument against the use of the internal HVOF process is the high thermal stress to which the substrates are subjected during the coating process. Traditional HVOF guns operate with a flame-stream energy level of 100–200 kW. Rendering HVOF technology usable for the application of internal coatings requires the reduction
G. Matthaeus, W. Brandl, I.-F. Secosan, G. Marginean, V. Chirila, D. Ackermann   +5 more
openaire   +1 more source

Dense titanium coatings by modified HVOF spraying

Surface and Coatings Technology, 2005
Abstract Titanium has an excellent corrosion property in chloride containing environments such as seawater. A modified HVOF spray process was developed by introducing a mixing chamber between the combustion chamber and the powder feed port.
J. Kawakita, T. Fukushima, S. Kuroda, H. Katanoda, K. Matsuo, H. Fukanuma   +5 more
openaire   +1 more source

Keraamipinnoitteiden valmistus HVOF-ruiskutuksella

2000
Keraamien pinnoittaminen termisesti ruiskuttamalla suoritetaan yleisesti plasmaruiskutuksella. Keraamien pinnoittaminen HVOF-ruiskutuksella (suurnopeusliekkiruiskutuksella) on poikkeuksellista. Keraamien pinnoittaminen HVOF-ruiskutuksella on kuitenkin kiinnostavaa, koska näin valmistettujen keraamipinnoitteiden käyttöominaisuudet ovat ...
Korpiola, Kari, Jokinen, Petri
openaire   +3 more sources

Development of Nano‐reinforced HVOF Sprayed Ceramic Coatings

Advanced Engineering Materials, 2006
HVOF spraying has been demonstrated to produce dense ceramic coatings with improved density and mechanical properties compared to the conventional plasma sprayed ceramic coatings. Nanocrystalline, nanocomposite coatings have been found to offer improved mechanical properties compared to their conventional counterparts.
Keskinen, Jari, Heczko, O., Lintunen, Pertti, Gustafsson, Tom, Ge, Y., Arponen, M., Hannula, Simo-Pekka, Turunen, Erja   +8 more
openaire   +1 more source

Mechanical properties of HVOF coatings

Journal of Thermal Spray Technology, 1995
High-velocity oxygen fuel (HVOF) thermal-sprayed carbide coatings are distinguished by high hardness, low porosity, and good wear resistance compared to other thermal spray technologies. However, for many engineering applications the ductility and fatigue resistance are the most important material properties.
openaire   +1 more source

Nd:YOV4 laser polishing on WC-Co HVOF coating

AIP Conference Proceedings, 2017
WC/Co coatings are widely applied to different types of components due to their extraordinary performance properties including high hardness and wear properties. In industrial applications High Velocity Oxy-Fuel (HVOF) technique is extensively used to deposit hard metal coatings.
Giorleo, L., Ceretti, E., Montesano, L., La Vecchia, G. M.   +3 more
openaire   +2 more sources

Oxidationsverhalten von HVOF–gespritzten MCrAlY–Schichten

Materialwissenschaft und Werkstofftechnik, 2007
AbstractDer Einfluss zweier Spritzparameter (Kerosindurchfluss und Brennkammerdruck) auf das Hochtemperaturoxidationsverhalten von HVOF ‐ gespritzten MCrAlY ‐ Schichten wurde anhand von CoNiCrAlY ‐ Schichten mit 15 Gew.‐% Aluminium untersucht. Verschiedene Testproben wurden nach dem thermischen Spritzen zur Verbesserung des Aufbaus (Homogenisierung ...
G. Mărginean, D. Frunzăverde, W. Brandl   +2 more
openaire   +1 more source

HVOF-Sprayed Functionally Gradient Coating

International Thermal Spray Conference, 1999
Abstract Thermally sprayed alumina coatings are widely used to improve wear resistance and heat insulation of steel and other metals. Usually these coatings have been made by plasma or flame spraying. HVOF-sprayed alumina coatings are more wear resistant and better bonded to the base material than with plasma and flame spraying.
openaire   +1 more source