Characterization and oxidation behaviour of nanostructured La 2 (Zr 0.7 Ce 0.3 ) 2 O 7 /YSZ coatings prepared by calcined precursor precipitate plasma spraying
Restricted accessResearch articleFirst published online July, 2021
Characterization and oxidation behaviour of nanostructured La 2 (Zr 0.7 Ce 0.3 ) 2 O 7 /YSZ coatings prepared by calcined precursor precipitate plasma spraying
In this study, La2(Zr0.7Ce0.3)2O7 nanostructured coatings were applied by plasma spraying of the nanostructured agglomerates. Initial nanostructured precursor, precursors calcined at 400°C, 600°C and 900°C with La2(Zr0.7Ce0.3)2O7 compound were used to apply top coat layer of the coatings. XRD results and microstructural observations indicated that a uniform distribution of LC phase in LZ matrix was obtained in the coatings applied by the precursors calcined at 400°C, 600°C and 900°C. The coatings were composed of vertical cracks. The isothermal oxidation results showed that TGO layer in the coating applied by the precursor calcined at 600°C (coating 600D60) was composed of Al2O3 protective compound. While, TGO layer in the conventional YSZ coating contained both compounds of protective Al2O3 and Ni(Cr, Al)2O4 detrimental spinel. The coating 600D60 had better isothermal oxidation resistance compared to the conventional YSZ. But, its thermal cycling resistance was approximately equal to the conventional YSZ.
DahlKV.Performance of nickel base superalloys in gas turbines[dissertation]. The Technical University of Denmark; 2006.
2.
VecchioneN, WasmerK, BalintDS, Characterization of EB-PVD yttrium-stabilised zirconia by nanoindentation. Surf Coatings Technol. 2009;203:1743–1747.
3.
ShankarAR, MudaliUK.Preparation of the plasma-sprayed graded thermal barrier coating by co-injection of premixed powders through a single plasma torch. Surf Eng. 2018;34:728–736.
4.
ChenX, ZhaoY, GuL, Hot corrosion behaviour of plasma sprayed YSZ/LaMgAl11O19 composite coatings in molten sulfate–vanadate salt. Corros Sci. 2011;53:2335–2343.
5.
ZhaoS, ZhaoY, ZouB, Characterization and thermal cycling behavior of La2(Zr07Ce03)2O7/8YSZ functionally graded thermal barrier coating prepared by atmospheric plasma spraying. J Alloys Compd. 2014;592:109–114.
6.
ChenX, GuL, ZouB, New functionally graded thermal barrier coating system based on LaMgAl11O19/YSZ prepared by air plasma spraying. Surf Coatings Technol. 2012;206:2265–2274.
7.
HabibiMH, WangL, LiangJ, An investigation on hot corrosion behavior of YSZ-Ta2O5 in Na2SO4+V2O5 salt at 1100°C. Corros Sci. 2013;75:409–414.
8.
MauerG, JarligoMO, MackDE, Plasma-sprayed thermal barrier coatings: new materials, processing issues, and solutions. J Therm Spray Technol. 2013;22(5):646–658.
9.
ChenX, ZhaoY, FanX, Thermal cycling failure of new LaMgAl11O19/YSZ double ceramic top coat thermal barrier coating systems. Surf Coatings Technol. 2011;205:3293–3300.
10.
TsipasSA.Effect of dopants on the phase stability of zirconia-based plasma sprayed thermal barrier coatings. J Eur Ceram Soc. 2010;30:61–72.
11.
LiuH, LiS, LiQ, Investigation on the phase stability, sintering and thermal conductivity of Sc2O3-Y2O3-ZrO2 for thermal barrier coating application. Mater Des. 2010;31:2972–2977.
12.
BahamirianM, HadaviSMM, FarviziM, Zro2 9.5Y2O3 5.6Yb2O3 5.2Gd2O3; a promising TBC material with high resistance to hot corrosion. J Asian Ceram Soc. 2020;8:898–908.
13.
ZhouH, YiD, YuZ, Preparation and thermophysical properties of CeO2 doped La2Zr2O7 ceramic for thermal barrier coatings. J Alloys Compd. 2007;438:217–221.
VaflenR, SeboldD, StoverD.Progress in thermal barrier coatings. New Jersey: John Wiley; 2009. Chapter 2, Material improvements and novel compositions; p. 59–70.
16.
JonnalagaddaKP, MahadeS, KramerS, Failure of multilayer suspension plasma sprayed thermal barrier coatings in the presence of Na2SO4 and NaCl at 900°C. J Therm Spray Tech. 2019;28:212–222.
17.
BobzinK, LugscheiderE, BagcivanN.Thermal cycling behaviour of lanthanum zirconate as EB-PVD thermal barrier coating. Adv Eng Mater. 2006;8:653–657.
18.
GuoX, LuZ, JungYG, Ceramic transactions vol. 260: advances in materials science for environmental and energy technologies V. Hoboken (NJ): John Wiley; 2016. Chapter 5, Thermal stability of novel multilayer lanthanum zirconate based thermal barrier coatings; p. 223–232.
19.
YugeswaranS, KobayashiA, SelvanB, In-flight behavior of lanthanum zirconate (La2Zr2O7) particles in gas tunnel type plasma jet and its coating properties. Vacuum. 2013;88:139–143.
20.
WangL, WangY, SunXG, Thermal shock behavior of 8YSZ and double-ceramic-layer La2Zr2O7/8YSZ thermal barrier coatings fabricated by atmospheric plasma spraying. Ceram Int. 2012;38:3595–3606.
21.
KhanZS, ZouB, CaoX.Hot corrosion behavior of La2(Zr0.7Ce0.3)2O7 based coatings prepared by plasma spraying and exposed to molten salts at 1050°C in air. Mater Corros. 2016;67:1195–1203.
22.
ZhaoS, GuL, ZhaoY, Thermal cycling behavior and failure mechanism of La2(Zr0.7Ce0.3)2O7/Eu3+-doped 8YSZ thermal barrier coating prepared by atmospheric plasma spraying. J Alloys Compd. 2013;580:101–107.
23.
ZhouX, WangJ, YuanJ, Calcium-magnesium-alumino-silicate induced degradation and failure of La2(Zr0.7Ce0.3)2O7/YSZ double-ceramic-layer thermal barrier coatings prepared by electron beam-physical vapor deposition. J Eur Ceram Soc. 2018;38:1897–1907.
24.
XuZH, HeLM, TangZH, Evolution of high temperature corrosion behavior of La2(Zr0.7Ce0.3)2O7 with the addition of Y2O3 thermal barrier coatings in contacts with vanadate–sulfate salts. J Alloys Compd. 2012;536:106–112.
25.
CheJW, LiuXY, WangXZ, Structure, thermal expansion coefficient and phase stability of La2(Zr0.7Ce0.3)2O7 studied by molecular dynamic simulation and experiment. Chem Phys Lett. 2018;697:48–52.
26.
ChenH, GaoY, LuoH, Preparation and thermophysical properties of La2Zr2O7 coatings by thermal spraying of an amorphous precursor. J Therm Spray Technol. 2011;20:1201–1208.
27.
JadhavA, PadtureNP, WuF, Thick ceramic thermal barrier coatings with high durability deposited using solution-precursor plasma spray. Mater Sci Eng A. 2005;405:313–320.
28.
TaleghaniPR, ValefiZ, EhsaniN.Synthesis of La2(Zr0.7Ce0.3)2O7 nanopowder using a simple chemical precipitation method and heat treatment at high temperature. Int J Mater Res. 2019;110:757–764.
29.
ChenH, GaoY, LiuY, Coprecipitation synthesis and thermal conductivity of La2Zr2O7. J Alloys Compd. 2009;480:843–848.
30.
PanZ, WangY, SunX.Fabrication and characterization of spray dried Al2O3–ZrO2–Y2O3 powders treated by calcining and plasma. Powder Technol. 2011;212:316–326.
31.
EstarkiML, EdrisH, ShojarazaviR, Spray drying of nanometric SYSZ powders to obtain plasma sprayable nanostructured granules. Ceram Int. 2013;39:9447–9457.
32.
XieL, MaX, OzturkA, Processing parameter effects on solution precursor plasma spray process spray patterns. Surf Coatings Technol. 2004;183:51–61.
33.
KulkarniAA., GolandA, HermanH, Advanced microstructural characterization of plasma-sprayed zirconia coatings over extended length scales. J Therm Spray Technol. 2005;14:239–250.
34.
MoriT, KurodaS, MurakamiH, Effects of initial oxidation on β phase depletion and oxidation of CoNiCrAlY bond coatings fabricated by warm spray and HVOF processes. Surf Coatings Technol. 2013;221:59–69.
35.
WangY, LiMX, SuoHL.Mechanical properties of YSZ thermal barrier coatings with segmented structure. Surf Eng. 2012;28:329–332.
WuJ, WeiX, PadtureNP, Low-thermal-conductivity rare-earth zirconates for potential thermal-barrier-coating applications. J Am Ceram Soc. 2002;85:3031–3035.
38.
MahadeS, CurryN, BjörklundS, Functional performance of Gd2Zr2O7/YSZ multi-layered thermal barrier coatings deposited by suspension plasma spray. Surf Coatings Technol. 2017;318:208–216.
39.
WangY.The improvement of thermal and mechanical properties of La2Zr2O7-based pyrochlores as high temperature thermal barrier coatings[dissertation]. University of Manchester; 2013.
40.
CotellCM, SpragueJA, SmidtFA.ASM handbook vol. 5: surface engineering. ASM International Handbook Committee; 1994. Chapter 6, Testing and characterization of coatings and thin films; p. 1794–1798.
41.
XuZ, HeL, MuR, Influence of the deposition energy on the composition and thermal cycling behavior of La2(Zr0.7Ce0.3)2O7 coatings. J Eur Ceram Soc. 2009;29:1771–1779.
42.
XuZ, HeL, ChenX, Thermal cycling behavior of La2Zr2O7 coating with the addition of Y2O3 by EB-PVD. J Alloys Compd. 2010;508:85–93.
43.
PulciG, TirillòJ, MarraF, High temperature oxidation of MCrAlY coatings modified by Al2O3 PVD overlay. Surf Coatings Technol. 2015;268:198–204.
44.
DaroonparvarM, YajidMAM, YusofNM, Improvement of thermally grown oxide layer in thermal barrier coating systems with nano alumina as third layer. Trans Nonferrous Met Soc China. 2013;23:1322–1333.
45.
LimaCRC, CincaN, GuilemanyJM.Study of the high temperature oxidation performance of thermal barrier coatings with HVOF sprayed bond coat and incorporating a PVD ceramic interlayer. Ceram Int. 2012;38:6423–6429.
46.
ChenWR, WuX, DudzinskiD, Modification of oxide layer in plasma-sprayed thermal barrier coatings. Surf Coatings Technol. 2006;200:5863–5868.
47.
SeoD, OgawaK.Advanced plasma spray applications
; 2012. chapter 3, Isothermal oxidation behavior of plasma sprayed MCrAlY coatings; pp. 61–82.
48.
NaumenkoD, ShemetV, SingheiserL, Failure mechanisms of thermal barrier coatings on MCrAlY-type bondcoats associated with the formation of the thermally grown oxide. J Mater Sci. 2009;44:1687–1703.
