Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
권호 표지
DOI QR코드

DOI QR Code

Effect of Substrate Rotation on the Phase Evolution and Microstructure of 8YSZ Coatings Fabricated by EB-PVD

  • Park, Chanyoung (Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Choi, Seona (Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Chae, Jungmin (Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Kim, Seongwon (Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Kim, Hyungtae (Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Oh, Yoon-Suk (Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology)
  • Received : 2015.08.26
  • Accepted : 2015.11.27
  • Published : 2016.01.31
Download PDF
⟨ Previous Next ⟩

Abstract

The effect of substrate rotation speed on the phase forming behavior and microstructural variation of 8 wt% yttria ($Y_2O_3$) stabilized $ZrO_2$ (8YSZ) coatings as a thermal barrier coating has been investigated. 8YSZ coatings with $100{\sim}200{\mu}m$ thickness were deposited by electron beam-physical vapor deposition onto a super alloy (Ni-Cr-Co-Al) substrate with a bond coating (NiCo-CrAlY). The width of the columnar grains of the 8YSZ coatings increased with increasing substrate rotation speed from 1 to 30 rpm at a substrate temperature range of $900{\sim}950^{\circ}C$. In spite of the different growth behaviors of coatings with different substrate rotation speeds, the phases of each coating were not changed remarkably. Even after post heat treatments with various conditions of the coated specimens fabricated at 20 rpm, only a change of color was noticeable, without any remarkable change in the phase or microstructure.

Keywords

References

  1. R. Rajendran, "Gas Turbine Coatings - An Overview," Eng. Failure Anal., 26 355-69 (2012). https://doi.org/10.1016/j.engfailanal.2012.07.007
  2. U. Schulz, C. Leyens, K. Fritscher, M. Peters, B. Saruhan-Brings, O. Lavigne, J.-M. Dorvaux, M. Poulain, R. Mevrel, and M. Caliez, "Some Recent Trends in Research and Technology of Advanced Thermal Barrier Coatings," Aerosp. Sci. Technol., 7 [1] 73-80 (2003). https://doi.org/10.1016/S1270-9638(02)00003-2
  3. K. N. Lee, "Protective Coatings for Gas Turbines." pp. 419-37 in The Gas Turbine Handbook, Section 4.4.2, Ed. by R.A. Dennis, NETL, Pittsburgh, 2005.
  4. D. R. Clarke, M. Oechsner, and N. P. Padture, "Thermal-Barrier Coatings for more Efficient Gas-Turbine Engines," MRS Bull., 37 [10] 891-98 (2012). https://doi.org/10.1557/mrs.2012.232
  5. D. Clarke and C. Levi, "Materials Design for the Next Generation Thermal Barrier Coatings," Annu. Rev. Mater. Res., 33 [1] 383-417 (2003). https://doi.org/10.1146/annurev.matsci.33.011403.113718
  6. D. R. Clarke and S. R. Phillpot, "Thermal Barrier Coating Materials," Mater. Today, 8 [6] 22-9 (2005). https://doi.org/10.1016/S1369-7021(05)70934-2
  7. D. Hass, A. J. Slifka, and H. Wadley, "Low Thermal Conductivity Vapor Deposited Zirconia Microstructures," Acta Mater., 49 [6] 973-83 (2001). https://doi.org/10.1016/S1359-6454(00)00403-1
  8. X. Ren and W. Pan, "Mechanical Properties of High-Temperature-Degraded Yttria-Stabilized Zirconia," Acta Mater., 69 397-406 (2014). https://doi.org/10.1016/j.actamat.2014.01.017
  9. W. Pan, S. R. Phillpot, C. Wan, A. Chernatynskiy, and Z. Qu, "Low Thermal Conductivity Oxides," MRS Bull., 37 [10] 917-22 (2012). https://doi.org/10.1557/mrs.2012.234
  10. A. Feuerstein, J. Knapp, T. Taylor, A. Ashary, A. Bolcavage, and N. Hitchman, "Technical and Economical Aspects of Current Thermal Barrier Coating Systems for Gas Turbine Engines by Thermal Spray and EBPVD: A Review," J. Therm. Spray Technol., 17 [2] 199-213 (2008). https://doi.org/10.1007/s11666-007-9148-y
  11. S. Sampath, U. Schulz, M. O. Jarligo, and S. Kuroda, "Processing Science of Advanced Thermal-Barrier Systems," MRS Bull., 37 [10] 903-10 (2012). https://doi.org/10.1557/mrs.2012.233
  12. Y. Tamarin, "Electron Beam Thermal Barrier Coatings," pp. 161-93 in Protective Coatings for Turbine Blades, Ed. By Y. Tamarin, ASM International, The Materials Information Society, Ohio, 2002.
  13. U. Schulz, H.J. Ratzer-Scheibe, B. Saruhan, and A. F. Renteria, "Thermal Conductivity Issues of EB-PVD Thermal Barrier Coatings," Mat.-wiss. u. Werkstofftech., 38 [9] 659-66 (2007). https://doi.org/10.1002/mawe.200700189
  14. U. Schulz, K. Fritscher, and M. Peters, "EB-PVD $Y_20_3$-and $CeO_2$/$Y_20_3$-Stabilized Zirconia Thermal Barrier Coatings-Crystal Habit and Phase Composition," Surf. Coat. Technol., 82 259-69 (1996). https://doi.org/10.1016/0257-8972(95)02727-0
  15. B. Jang and H. Matsubara, "Influence of Rotation Speed on Microstructure and Thermal Conductivity of Nano-Porous Zirconia Layers Fabricated by EB-PVD," Scrip. Mater., 52 [7] 553-58 (2005). https://doi.org/10.1016/j.scriptamat.2004.12.003
  16. A. F. Renteria, B. Saruhan, U. Schulz, H.-J. Raetzer-Scheibe, J. Haug, and A. Wiedenmann, "Effect of Morphology on Thermal Conductivity of EB-PVD PYSZ TBCs," Surf. Coat. Technol., 201 [6] 2611-20 (2006). https://doi.org/10.1016/j.surfcoat.2006.05.003
  17. O. Altun and Y. Boke, "Effect of the Microstructure of EBPVD Thermal Barrier Coatings on the Thermal Conductivity and the Methods to Reduce the Thermal Conductivity," Arch. Mater. Sci., 48 48 (2009).
  18. J. R. Nicholls, K. Lawson, A. Johnstone, and D. Rickerby, "Methods to Reduce the Thermal Conductivity of EB-PVD TBCs," Surf. Coat. Technol., 151 383-91 (2002).
  19. X. Q. Cao, R. Vassen, F. Tietz, and D. Stoever, "New Double-Ceramic-Layer Thermal Barrier Coatings Based on Zirconia-Rare Earth Composite Oxides," J. Eur. Ceram. Soc., 26 [3] 247-51 (2006). https://doi.org/10.1016/j.jeurceramsoc.2004.11.007
  20. C.Y. Park, Y. H. Yang, S.W. Kim, S. M. Lee, H.T. Kim, B. K. Jang, D. S. Lim, and Y. S Oh, "Effect of $La_2O_3$ Addition on Interface Chemistry Between 4YSZ Top Layer and Ni Based Alloy Bond Coat in Thermal Barrier Coating by EB PVD," J. Nanosci. Nanotechnol., 14 8659-64 (2014). https://doi.org/10.1166/jnn.2014.10000
  21. U. Schulz, S. G. Terry, and C. G. Levi, "Microstructure and Texture of EB-PVD TBCs Grown under Different Rotation Modes," J. Mater. Sci. Eng. A, 360 319-29 (2003). https://doi.org/10.1016/S0921-5093(03)00470-2

Cited by

  1. Analytical Model of the Process of Thermal Barrier Coating by the MO CVD Method vol.11, pp.11, 2016, https://doi.org/10.3390/coatings11111390