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Journal of Thermal Spray Technology

, Volume 8, Issue 2, pp 258–262 | Cite as

Surface protection of light metals by one-step laser cladding with oxide ceramics

  • S. Nowotny
  • A. Richter
  • K. Tangermann
Article

Abstract

Today, intricate problems of surface treatment can be solved through precision cladding using advanced laser technology. Metallic and carbide coatings have been produced with high-power lasers for years, and current investigations show that laser cladding is also a promising technique for the production of dense and precisely localized ceramic layers. In the present work, powders based on Al2O3 and ZrO2 were used to clad aluminum and titanium light alloys. The compact layers are up to 1 mm thick and show a nonporous cast structure as well as a homogeneous network of vertical cracks. The high adhesive strength is due to several chemical and mechanical bonding mechanisms and can exceed that of plasmasprayed coatings. Compared to thermal spray techniques, the material deposition is strictly focused onto small functional areas of the workpiece. Thus, being a precision technique, laser cladding is not recommended for large-area coatings. Examples of applications are turbine components and filigree parts of pump casings.

Keywords

ceramic coating cladding laser light metals wear protection 

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References

  1. 1.
    J. Drozak, Properties of Particles and Adhesion at Thermal Spraying of Metal and Ceramic, VDI-Fortschrittberichte, Reihe 5 (No. 361), VDI-Verlag, 1994 (in German)Google Scholar
  2. 2.
    H.-D. Steffens, Z. Babiak, and M. Gramlich, Production of Thick Thermal Barrier Coatings of ZrO2-Y2O3 with Optimized Lifetime, Proc. of DLR-Workshop “Gradientenwerkstoffe,” 11.11, Köln, 1993 (in German)Google Scholar
  3. 3.
    R. Agethen and E. Lugscheider, Adhesion Strength of Thermal Sprayed Coatings, VDI-Bericht No. 702, VDI-Verlag, 1988, p 197–213 (in German)Google Scholar
  4. 4.
    S.Z. Lee and K.-H. Zum Gahr, Surface Treatments of Al2O3-Ceramics by CO2-Lasers, Materialwiss. und Werkstofftechn., Vol 23, 1992. p 117–123CrossRefGoogle Scholar
  5. 5.
    P.C. Tsai, H.L. Tsai, and D.C. Tu, Effect of Processing Parameters on Laser Glazing of Plasma Sprayed YSZ, in Proc. of LAMP ’92, Nagaoka, June 1992, p 877–882Google Scholar
  6. 6.
    R. Sivakumar and B.L. Mordike, Laser Melting of Plasma Sprayed Ceramic Coatings, Surf. Eng., Vol 4 (No. 2), 1988, p 127–140Google Scholar
  7. 7.
    B. Grünenwald, Beam Combining for Laser Surface Treatment with Additional Material, Final Report, Dresden, Stuttgart, March 1995 (in German)Google Scholar
  8. 8.
    S. Nowotny, A. Müller, and A. Techel, Mechanical Properties of Laser Claddings of WC-Reinforced Hard Alloys, DVS-Berichte, Vol 175, 1996, p 155–159 (in German)Google Scholar
  9. 9.
    E. Ramous, L. Giordano, and A. Tiziani, Laser Cladding of Ceramic and Metallic Coatings on Steel, Proc. of Surface Engineering with High Energy Beams, 2nd International Seminar, Lisboa, 1989Google Scholar
  10. 10.
    E. Lugscheider, H. Bolender, K. Hochmuth, and G. Herziger, One-Step Powder Cladding of Oxide Ceramics onto Metal Substrates with CO2-Laser Radiation, DVS-Berichte, Vol 163, 1994, p 213–218Google Scholar
  11. 11.
    Y.T. Pei, J.H. Ouyang, and T.C. Lei, Laser Cladding of ZrO2-(Ni-Alloy) Composite Coating, Surf. Coat. Technol., Vol 81, 1996, p 131–135CrossRefGoogle Scholar
  12. 12.
    R. Gassmann and M.F. Modest, Laser Cladding of PSZ on Titanium, Nickel, and Steel Alloys, Proc. of ICALEO 1994, 17–20.10, 1994, p 125–133Google Scholar
  13. 13.
    S.M. Lang, C.L. Fillmore, and L.H. Maxwell, J. Nat. Bur. Standards, Vol 4 (No. 84), 1952, p 301Google Scholar
  14. 14.
    J. Beczkowiak, X. Laufenburg, and H. Keller, Al2O3/TiO2 Coatings: An Alternative to Cr2O3?, DVS-Berichte, Vol 175, 1996, p 68–71 (in German)Google Scholar

Copyright information

© ASM International 1999

Authors and Affiliations

  • S. Nowotny
    • 1
  • A. Richter
    • 1
  • K. Tangermann
    • 1
  1. 1.Fraunhofer Institute for Material and Beam TechnologyDresdenGermany

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