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Investigation on plasma-sprayed ZrO2 thermal barrier coating on nickel alloy substrate

  • Lu An-xian 
  • Chang Ying 
  • Cai Xiao-mei 
Article

Abstract

The thermal barrier coatings with NiCrAlY alloy bonding layer, NiCrAlY-Y2O3 stabilized ZrO2 transition layer and Y2O3 stabilized ZrO2 ceramic layer are prepared on nickel alloy substrates using the plasma spray technique. The relationship among the composition, structure and property of the coatings are investigated by means of optical microscope, scanning electronic microscope and the experiments of thermal shock resistance cycling and high temperature oxidation resistance. The results show that the structure design of introducing a transition layer between Ni alloy substrate and ZrO2 ceramic coating guarantees the high quality and properties of the coatings; ZrO2 coatings doped with a little SiO2 possesses better thermal shock resistance and more excellent hot corrosion resistance as compared with ZrO2 coating materials without SiO2; the improvement in performance of ZrO2 coating doped with SiO2 is due to forming more dense coating structure by self- closing effects of the flaws and pores in the ZrO2 coatings.

Key words

plasma spray Ni alloy substrate transition layer ZrO2 ceramic layer thermal barrier coating 

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References

  1. [1]
    Bartuli C, Bertamini L, Matera S, et al. Investigation of the formation of an amorphous film at the ZrO2, Y2O3/NiCoAlY interface of thermal barrier coatings produced by plasma spraying[J]. Materials Science and Engineering, 1995, 199: 222–237.Google Scholar
  2. [2]
    Chen H C, Plender E, Heberlein J. Plasma spraying ZrO2 thermal barrier coating with an appropriate amount of SiO2[J]. Thin Solids Film, 1998, 315: 159–169.CrossRefGoogle Scholar
  3. [3]
    Taylor M P, Evans H E. The influence of bond coat surface roughness and structure on the oxidation of a thermal barrier coating system[J]. Mat Sci Forum, 2001, 372: 711–718.CrossRefGoogle Scholar
  4. [4]
    Russell N V, Wigley F, Williamson J. Micro-structural changes to metal bond coatings on gas turbine alloys with time at high temperature[J]. J Mat Sci, 2000, 35(9): 2131–2138.CrossRefGoogle Scholar
  5. [5]
    Tolpygo V K, Clarke D R. Surface rumpling of a (Ni, Pt)Al bond coat induced by cyclic oxidation[J]. Acta Mat, 2000, 48(13): 3283–3293.CrossRefGoogle Scholar
  6. [6]
    Pekshev P Yu, Tcherniakov S V, Arzhakin N A, et al. Plasm-sprayed multilayer protective coatings for gas turbine units[J]. Surface and Coatings Technology, 1994, 64(1): 5–9.CrossRefGoogle Scholar
  7. [7]
    Prindley W J, Miller R A. Thermal barrier coating life and isothermal oxidation of low-pressure plasma-sprayed bond coating alloys[J]. Surface and Coating Technology, 1990, 43(1–3): 446–457.CrossRefGoogle Scholar
  8. [8]
    Watanabe R, Kawasaki A. Recent development of functionally gradient materials for special application to space plane[J]. Composite Materials, 1992, 39(4): 197–208.Google Scholar
  9. [9]
    Giannakopoulos A E, Sulesh S, Finot M, et al. Elastoplastic analysis of thermal cycling: Layered materials with compositional gradients[J]. Acta Metal Mat, 1995, 43(4): 1335–1354.CrossRefGoogle Scholar

Copyright information

© Central South University 2002

Authors and Affiliations

  • Lu An-xian 
    • 1
  • Chang Ying 
    • 1
  • Cai Xiao-mei 
    • 1
  1. 1.School of Materials Science and EngineeringCentral South UniversityChangshaChina

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