Evaluation of hot corrosion behavior of plasma sprayed scandia and yttria co-stabilized nanostructured thermal barrier coatings in the presence of molten sulfate and vanadate salt

Abstract In this study, the substrates of Inconel 738-LC superalloy were first sprayed with an NiCrAlY bondcoat and then with a nanostructured scandia (3.6 mol%) and yttria (0.4 mol%) co-stabilized zirconia (4SYSZ) topcoat by air plasma spraying (APS). Hot corrosion studies of plasma sprayed thermal barrier coatings (TBCs) were conducted in 45 wt% Na2SO4 + 55 wt% V2O5 molten salt at 910 °C for 300 h. The results show that the failure of this TBC occurred in bondcoating layer due to the formation of mixed oxide (NiO, NiAl2O4 and NiCr2O4) in this layer.

[1]  Ying Wang,et al.  Hot corrosion behaviour of plasma sprayed YSZ/LaMgAl11O19 composite coatings in molten sulfate–vanadate salt , 2011 .

[2]  E. Jordan,et al.  Fabrication and evaluation of plasma sprayed nanostructured alumina-titania coatings with superior properties , 2001 .

[3]  R. Razavi,et al.  Spray drying of nanometric SYSZ powders to obtain plasma sprayable nanostructured granules , 2013 .

[4]  S. Lee,et al.  Wear of plasma-sprayed nanostructured zirconia coatings against stainless steel under distilled-water conditions , 2003 .

[5]  R. Jayaganthan,et al.  Hot Corrosion Studies of Detonation-Gun-Sprayed NiCrAlY + 0.4 wt.% CeO2 Coated Superalloys in Molten Salt Environment , 2011 .

[6]  H. S. Jazi,et al.  Advanced Plasma Spray Applications , 2012 .

[7]  I. Gurrappa,et al.  Thermal Barrier Coatings for Hot Corrosion Resistance of CM 247 LC Superalloy , 1998 .

[8]  P. J. Moore,et al.  Thermal shock testing of thermal barrier coating/bondcoat systems , 2004 .

[9]  Anthony G. Evans,et al.  Mechanisms controlling the durability of thermal barrier coatings , 2001 .

[10]  C. G. Park,et al.  Microscopic observation of degradation behavior in yttria and ceria stabilized zirconia thermal barrier coatings under hot corrosion , 2005 .

[11]  A. Kobayashi,et al.  A comparative study on hot corrosion resistance of three types of thermal barrier coatings: YSZ, YSZ + Al2O3 and YSZ/Al2O3 , 2008 .

[12]  N. Wu,et al.  Effect of Al2O3 overlay on hot-corrosion behavior of yttria-stabilized zirconia coating in molten sulfate-vanadate salt , 2003 .

[13]  R. Razavi,et al.  Life time of new SYSZ thermal barrier coatings produced by plasma spraying method under thermal shock test and high temperature treatment , 2014 .

[14]  M. Rahimipour,et al.  Evaluation of hot corrosion behavior of CSZ, CSZ/micro Al2O3 and CSZ/nano Al2O3 plasma sprayed thermal barrier coatings , 2014 .

[15]  M. Mayo,et al.  The hot corrosion resistance of 20 mol% YTaO4 stabilized tetragonal zirconia and 14 mol% Ta2O5 stabilized orthorhombic zirconia for thermal barrier coating applications , 2002 .

[16]  J. Ouyang,et al.  Hot corrosion behaviour of Yb2Zr2O7 ceramic coated with V2O5 at temperatures of 600―800 °C in air , 2010 .

[17]  L. Pagnotta,et al.  Processing, Microstructure and Mechanical Properties of Air Plasma‐Sprayed Ceria–Yttria Co‐stabilized Zirconia Coatings , 2010 .

[18]  Chungen Zhou,et al.  Evaluation of microstructural evolution of thermal barrier coatings exposed to Na2SO4 using impedance spectroscopy , 2011 .

[19]  E. Jordan,et al.  Microstructure development of Al2O3-13wt.%TiO2 plasma sprayed coatings derived from nanocrystalline powders , 2002 .

[20]  D. Stöver,et al.  Overview on advanced thermal barrier coatings , 2010 .

[21]  S. Das,et al.  Glass-ceramics as oxidation resistant bond coat in thermal barrier coating system , 2009 .

[22]  C. Berndt,et al.  Integrity of nanostructured partially stabilized zirconia after plasma spray processing , 2001 .

[23]  Youshen Wu,et al.  The formation model of Ni–Cr oxides on NiCoCrAlY-sprayed coating , 2011 .

[24]  Basil R. Marple,et al.  Thermal Spray Coatings Engineered from Nanostructured Ceramic Agglomerated Powders for Structural, Thermal Barrier and Biomedical Applications: A Review , 2007 .

[25]  R. Razavi,et al.  Synthesis of Scandia, Yttria Stabilized Zirconia (SYSZ) Nanoparticles by New Wet Chemistry Method , 2012 .

[26]  D. Mess,et al.  India as a Hot Corrosion‐Resistant Stabilizer for Zirconia , 1992 .

[27]  Chunhua Yan,et al.  Unusual calcination temperature dependent tetragonal–monoclinic transitions in rare earth-doped zirconia nanocrystals , 2003 .

[28]  Raheleh Ahmadi-Pidani,et al.  Comparison of hot corrosion behaviors of plasma-sprayed nanostructured and conventional YSZ thermal barrier coatings exposure to molten vanadium pentoxide and sodium sulfate , 2014 .

[29]  Yongqing Wang,et al.  Commercial thermal barrier coatings with a double-layer bond coat on turbine vanes and the process repeatability , 2009 .

[30]  C. Williams,et al.  Hot corrosion of CoCrAlY by molten sulfate-vanadate deposits☆ , 1987 .

[31]  X. Xiong,et al.  Hot corrosion behavior of Sc2O3–Y2O3–ZrO2 thermal barrier coatings in presence of Na2SO4 + V2O5 molten salt , 2014 .

[32]  Sudhangshu Bose,et al.  High Temperature Coatings , 2007 .

[33]  C. Berndt,et al.  Mechanical property variations within thermal barrier coatings , 2007 .

[34]  M. Takemoto,et al.  Acoustic emission source analysis of plasma sprayed thermal barrier coatings during four-point bend tests , 2001 .

[35]  J. R. Brandon,et al.  Phase stability of zirconia-based thermal barrier coatings part II. Zirconia-ceria alloys , 1991 .

[36]  A. Kobayashi,et al.  Bond Coat Oxidation and Hot Corrosion Behavior of Plasma Sprayed YSZ Coating on Ni Superalloy , 2007 .

[37]  Y. Sohn,et al.  Degradation of Thermal Barrier Coatings by Fuel Impurities and CMAS: Thermochemical Interactions and Mitigation Approaches , 2009, International Thermal Spray Conference.

[38]  Satya Prakash,et al.  Hot corrosion of some superalloys and role of high-velocity oxy-fuel spray coatings : a review , 2005 .

[39]  R. Razavi,et al.  Fabrication and Evaluation of Plasma-Sprayed Nanostructured and Conventional YSZ Thermal Barrier Coatings , 2012 .

[40]  P. Scardi,et al.  Phase stability of scandia–yttria-stabilized zirconia TBCs , 1998 .

[41]  Xizhi Fan,et al.  Thermal cycling failure of new LaMgAl11O19/YSZ double ceramic top coat thermal barrier coating systems , 2011 .

[42]  C. Blasi,et al.  Structure and thermal properties of heat treated plasma sprayed ceria-yttria co-stabilized zirconia coatings , 2010 .

[43]  C. Berndt,et al.  Nanostructured and conventional YSZ coatings deposited using APS and TTPR techniques , 2006 .

[44]  C. Ding,et al.  Nanostructured zirconia coating prepared by atmospheric plasma spraying , 2002 .

[45]  Robert L. Jones,et al.  Some Aspects of the Hot Corrosion of Thermal Barrier Coatings , 1997 .

[46]  Yu Bai,et al.  High performance nanostructured ZrO2 based thermal barrier coatings deposited by high efficiency supersonic plasma spraying , 2011 .

[47]  H. Choi,et al.  Phase transformation and bond coat oxidation behavior of plasma-sprayed zirconia thermal barrier coating , 2000 .

[48]  Jones.  Experiences in seeking stabilizers for zirconia having hot corrosion-resistance and high temperature tetragonal (t`) stability. Interim report , 1996 .

[49]  Liping Huang,et al.  Effect of physical vapor deposited Al2O3 film on TGO growth in YSZ/CoNiCrAlY coatings , 2012 .

[50]  Y. Sohn,et al.  Degradation of Yttria-Stabilized Zirconia Thermal Barrier Coatings by Vanadium Pentoxide, Phosphorous Pentoxide, and Sodium Sulfate , 2007 .

[51]  Raheleh Ahmadi-Pidani,et al.  Evaluation of hot corrosion behavior of plasma sprayed ceria and yttria stabilized zirconia thermal barrier coatings in the presence of Na2SO4+V2O5 molten salt , 2012 .

[52]  P. C. Patnaik,et al.  The Growth and Influence of Thermally Grown Oxide in a Thermal Barrier Coating , 2006, International Thermal Spray Conference.

[53]  Fei Li,et al.  Nanostructured yttria stabilized zirconia coatings deposited by air plasma spraying , 2007 .

[54]  Yulei Wang,et al.  Thermal shock behavior of 8YSZ and double-ceramic-layer La2Zr2O7/8YSZ thermal barrier coatings fabricated by atmospheric plasma spraying , 2012 .

[55]  Ju-woong Jang,et al.  Size effect of trivalent oxides on low temperature phase stability of 2Y-TZP , 2001 .

[56]  Y. Wang,et al.  Influence of pores on the thermal insulation behavior of thermal barrier coatings prepared by atmospheric plasma spray , 2011 .