Skip to main content
SpringerLink
Log in

Alumina-base plasma-sprayed materials—Part II: Phase transformations in aluminas

  • Reviewed Paper
  • Published:
Journal of Thermal Spray Technology Aims and scope Submit manuscript

Abstract

Aluminum oxide is widely used for plasma spraying. Alumina deposits consist of a number of metastable crystallographic modifications, which at elevated temperatures, transform to the stable α phase. It was shown that additions of various oxides changed the phase composition and shift phase transformation temperatures. This paper addresses the variation of phase compositions and temperatures of the phase changes for plasma-sprayed alumina deposits manufactured with alumina-base materials containing O2O3 and TiO2.

This study combines the results obtained from energy dispersive analyzer of X-rays (EDAX) and scanning electron microscopy (SEM) chemical analysis, differential thermal analysis (DTA), and X-ray powder diffrac-tion (XRD) quantitative phase analysis of as-sprayed and annealed samples of alumina deposits and shows how the two additives change the phase composition and the α-phase formation temperature. This transformation temperature varied by nearly 200 °C. The metastable alumina sequences were also influenced by the chemical composition; for example, the content of 6 alumina varied between 0 and 55 wt %.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. N.N. Ault, Characteristics of Refractory Oxide Coatings Produced by Flame-Spraying, J. Am. Ceram. Soc., Vol 40,1957, p 69–74

    Article  CAS  Google Scholar 

  2. E. Dörre and H. Hübner, Alumina Processing, Properties, and Appli- cations, Springer-Verlag, Berlin, 1984, p 20–40

    Google Scholar 

  3. Powder Diffraction File, Alphabetical index, JCPDS, International Center for Diffraction Data, PA, USA, 1986

  4. H. Herman, Plasma-Sprayed Coatings, Sci. Am., Vol 259 (No. 3), 1988, p 112–117

    Article  CAS  Google Scholar 

  5. P. Raus and P. Chráska, Transmission Electron Microscope Study of a Plasma-Sprayed Zircon Coating, Ceramics (Silicaty), Vol 33 (No. 4), 1989, p 325–332 (in Czechoslovakian)

    CAS  Google Scholar 

  6. P. Chráska, J. Dubsky, B. Kolman, J. Ilavsky, and J. Forman, Study of Phase Changes in Plasma-Sprayed Deposits, J. Therm. Spray Tech- nol., Vol 1 (No. 4), 1992, p 301–306

    Google Scholar 

  7. I.A. Fisher, Variables Influencing the Characteristics of Plasma- Sprayed Coatings, Int. Met. Rev., Vol 17, 1972, p 117–129

    CAS  Google Scholar 

  8. C.X. Ding, R.A. Zatorski, and H. Herman, Oxide Powders for Plasma Spraying—The Relationship Between Powder Charac- teristics and Coating Properties, Thin Solid Films, Vol 118, 1984, p 467–475

    Article  CAS  Google Scholar 

  9. J. Dubsky, B. Kolman, and P. Chráska, Influence of Cooling Rate on Phase Transformation in Alumina, Proc. of 7th Metallographic Sym- posium, Part 1, Czech Society for Sciences and Technology, High Ta- tras, Czechoslovakia, Kosice, 1989, p 168–171

    Google Scholar 

  10. G.N. Heintze and S. Uematsu, Preparation and Structures of Plasma- Sprayed β- and α-Al2O3 Coatings, Surf. Coat. Technol., Vol 50, 1992, p 213–222

    Article  CAS  Google Scholar 

  11. M. Kumagain and G.L. Messing, Enhanced Densification of Boehmite Sol-Gel by α-Alumina Seeding, J. Am. Ceram. Soc., Vol 67, 1984, p C230-C231

    Article  Google Scholar 

  12. G.L. Messing, M. Kumagai, R.A. Shellman, and J.L. McArdle, Seeded Transformation for Microstructural Control of Ceramic, The Science of Ceramic Chemical Processing, L.L. Hench and D.R. Ultrich, Ed., Wiley, 1986, p 259–271

  13. G.C. Bye and G.T. Sympkin, Influence of Cr and Fe on Formation of α- Al2O3 from β-Al2O4, J. Am. Ceram. Soc., Vol 57, 1974, p 367–371

    Article  CAS  Google Scholar 

  14. T. Tushida, R. Furiuchi, T. Ishii, and K. Itoh, The Effect of Cr3+ and Fe3+ Ions on the Transformation of Different Aluminum Hydroxides to (αAl2O3, Thermochim. Acta, Vol 64, 1983, p 337–353

    Article  Google Scholar 

  15. I.A. Bonder, V.B. Glushkova, and P.A. Ceitlin, Study of Phase Transi- tions in Alumina, Inorganic Mater. (Neorganiceskie Materialy), Vol 7, 1971, p l367–1371

    Google Scholar 

  16. L. Giachetti and N. Tozzi, Quantitative Powder X-Ray Diffrac- tion of Some Ceramic Materials, Mater. Sci. Monography, Vol 16, 1983, p 185–195

    CAS  Google Scholar 

  17. R. Fillit, P. Homerin, J. Shafer, H. Bruyas, and F. Thevenot, Quantita- tive XRD Analysis of Zirconia-Toughened Alumina Ceramics, J. Ma- ter. Sci., Vol 22, 1987, p 3566–3570

    Article  CAS  Google Scholar 

  18. H.K. Schmidt, Quantitative Analysis of Polymorphic Mixes of Zir- conia by X-Ray Diffraction, J. Am. Ceram. Soc., Vol 70 (No. 5), 1987, p 367–376

    Article  Google Scholar 

  19. J. Wang, C.B. Poton, and P.M. Marquis, A Quantitative X-Ray Diffrac- tion Phase Analysis in the Reaction-Sintered Mullite Ceramic, J. Ma- ter. Sci. Lett., Vol 11, 1992, p 1301–1304

    Article  CAS  Google Scholar 

  20. J. Ilavsky, Studies of Plasma-Sprayed Alumina, dissertation, State Uni- versity of New York, UMI, No. 9500218, 1994

  21. N. Iwamoto, Y. Makino, and Y. Arata, “Crystallographical Considera- tions of Sprayed Alumina,” Paper 66, presented at 9th International Thermal Spraying Conference, (Hague, Netherlands), 1980

  22. C. Misra, Activated Aluminas, Industrial Alumina Chemicals, ACS Monograph 184, American Chemical Society, 1986, p 73–106

Download references

Author information

Authors and Affiliations

  1. Czech Academy of Sciences, Institute of Plasma Physics, Prague, Czech Republic

    J. Ilavsky, P. Chraska & J. Dubsky

  2. Thermal Spray Laboratory, State University of New York, Stony Brook, NY, USA

    C. C. Berndt & H. Herman

Authors
  1. J. Ilavsky
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. C. C. Berndt
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. H. Herman
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. P. Chraska
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. J. Dubsky
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

Part I of this article was printed in the September issue of JTST Vol 6 (No. 3), September 1997, p 320–326

Rights and permissions

Reprints and permissions

About this article

Cite this article

Ilavsky, J., Berndt, C.C., Herman, H. et al. Alumina-base plasma-sprayed materials—Part II: Phase transformations in aluminas. J Therm Spray Tech 6, 439–444 (1997). https://doi.org/10.1007/s11666-997-0028-2

Download citation

  • Received:

  • Revised:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s11666-997-0028-2

Keywords

Search

Navigation