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Development and application of TiC-Ni-based plasma sprayed coatings

Entwicklung und Anwendung plasmagespritzter Schichten auf TiC-Ni-Basis

Lugscheider, E. ; Deutscher Verband für Schweißen und Verwandte Verfahren e.V. -DVS-:
United Thermal Spray Conference 1999. Vorträge und Posterbeiträge
Düsseldorf: Verlag für Schweißen und Verwandte Verfahren, 1999
ISBN: 3-87155-653-X
United Thermal Spray Conference (UTSC) <1999, Düsseldorf>
Conference Paper
Fraunhofer IKTS ()
thermal spray; plasma spray; APS; cermets; TiC-based coating

This paper describes results of fundamental studies of APS for different alloying steps in the production of TiC-based coatings from agglomerated and sintered powders and results of application of APS coatings on piston rings. APS is, besides DGS and HVOF, a suitable technology for producing such coatings. The introduction of nitrogen into the hard phase does not result in an increase of dry abrasion wear resistance for APS coatings, but has a significant effect on coating wear when used as a piston ring coating in a passenger car engine. If spraying is done by APS, it is economic advantage that Ar/H2 plasma gases can be used for reaching optimum results instead of Ar/He, which must be used for WC-Co or Cr3C2-NiCr. With respect to dry abrasive wear, TiC-based coatings are fully competitive with commercially introduced systems and can be compositionally tailored for use in simultaneously abrasive and corrosive media.