Abstract
Engine blocks of modern passenger car engines are generally made of light metal alloys, mostly hypoeutectic AlSi-alloys. Due to their low hardness, these alloys do not meet the tribological requirements of the system cylinder running surface—piston rings—lubricating oil. In order to provide a suitable cylinder running surface, nowadays cylinder liners made of gray cast iron are pressed in or cast into the engine block. A newer approach is to apply thermal spray coatings onto the cylinder bore walls. Due to the geometric conditions, the coatings are applied with specifically designed internal diameter thermal spray systems. With these processes a broad variety of feedstock can be applied, whereas mostly low-alloyed carbon steel feedstock is being used for this application. In the context of this work, an iron-based wire feedstock has been developed, which leads to a nanocrystalline coating. The application of this material was carried out with the Plasma Transferred Wire Arc system. AlMgSi0.5 liners were used as substrates. The coating microstructure and the properties of the coatings were analyzed.
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References
Aluminium-Motorbloecke (Aluminium engine blocks), sv corporate media, 2005 (in German)
G. Barbezat, Thermal Spray Coatings for Tribological Applications in the Automotive Industry, Proceedings of the 2006 International Thermal Spray Conference, B.R. Marple, M.M. Hyland, Y.-C. Lau, R.S. Lima, and J. Voyer, Eds., May 15-18, 2006 (Seattle), ASM International, 2006
D.R. Marantz, K.A. Kowalsky, J.R. Baughman, and D.J. Cook, Plasma Transferred Wire Arc Thermal Spray Apparatus and Method, U.S. patent No. 799242, Sept. 15, 1998
L.E. Byrnes, L.L. VanKuiken Jr., and M.S. Kramer, High Pressure Water Jet Method of Blasting Low Density Metallic Surfaces, U.S. Patent No. 5380564, Jan. 10, 1995
E. Lugscheider, R. Dicks, K. Kowalsky, D. Cook, K. Nassenstein, and C. Verpoort, A Materials System and Method of its Application for the Wear Protection of Aluminium Engine Cylinder Bore Surfaces, Proceedings of the International Thermal Spray Conference 2004, E. Lugscheider, Ed., May 10-12, 2004 (Osaka), DVS-Verlag, 2004, p 334-340
G. Barbezat, S. Keller, and G. Wuest, Internal Plasma Spray Process for Cylinder Bores in Automotive Industry, Proceedings of the 15th International Thermal Spray Conference, C. Coddet, Ed., May 25-29, 1998 (Nice), ASM International, 1998, p 963-979
G. Barbezat and J. Schmid, Plasmabeschichtungen von Zylinderkurbelgehäusen und ihre Bearbeitung durch Honen, MTZ Motortechnische Zeitschrift 62 (2001) 4, Vieweg Verlag/GWV Fachverlage, Munich, 2001, p 314-320 (in German)
C. Verpoort, W. Blume, M. Broda, F. Orlamuender, K. Holdik, S. Kollinger, K. Bobzin, F. Ernst, J. Zwick, T. Schlaefer, F. Schreiber. T. Wenz, A. Schwenk, and G. Flores, Thermisches Beschichten von Aluminium-Zylinderlaufbahnen mit nanokristallinen Schichten im Rahmen des BMBF-NanoMobil-Projektes (Thermal Spraying of Cylinder Running Surfaces within the Framework of the BMBF NanoMobile Project), MTZ Konferenz Motor 2007, May 22-23, 2007, Neckarsulm, Germany (in German)
D. Cook, “Processing, Structure, Property and Performance Relationships for the Thermal Spray of the Internal Surface of Aluminum Cylinders,” Dissertation, State University of New York at Stony Brook, May 2001
Acknowledgment
The Authors would like to thank the German Federal Ministry of Research and Education for funding the “NaCoLab” project (grant ID 03X0003).
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Bobzin, K., Ernst, F., Zwick, J. et al. Coating Bores of Light Metal Engine Blocks with a Nanocomposite Material using the Plasma Transferred Wire Arc Thermal Spray Process. J Therm Spray Tech 17, 344–351 (2008). https://doi.org/10.1007/s11666-008-9188-y
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DOI: https://doi.org/10.1007/s11666-008-9188-y