Please wait a minute...

Frontiers of Mechanical Engineering

Front. Mech. Eng.
RESEARCH ARTICLE
Effect of TGO on the tensile failure behavior of thermal barrier coatings
Le WANG1,2, Yuelan DI2(), Ying LIU1(), Haidou WANG2, Haoxing YOU3, Tao LIU1
1. School of Mechatronics Engineering, Nanchang University, Nanchang 330031, China
2. National Key Laboratory for Remanufacturing, Academy of Army Armored Forces, Beijing 100072, China
3. State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China
Download: PDF(2523 KB)   HTML
Export: BibTeX | EndNote | Reference Manager | ProCite | RefWorks
Abstract

Thermally grown oxide (TGO) may be generated in thermal barrier coatings (TBCs) after high-temperature oxidation. TGO increases the internal stress of the coatings, leading to the spalling of the coatings. Scanning electron microscopy and energy-dispersive spectroscopy were used to investigate the growth characteristics, microstructure, and composition of TGO after high-temperature oxidation for 0, 10, 30, and 50 h, and the results were systematically compared. Acoustic emission (AE) signals and the strain on the coating surface under static load were measured with AE technology and digital image correlation. Results showed that TGO gradually grew and thickened with the increase in oxidation time. The thickened TGO had preferential multi-cracks at the interface of TGO and the bond layer and delayed the strain on the surface of the coating under tensile load. TGO growth resulted in the generation of pores at the interface between the TGO and bond layer. The pores produced by TGO under tensile load delayed the generation of surface cracks and thus prolonged the failure time of TBCs.

Keywords thermally grown oxides      thermal barrier coatings      acoustic emission technology      digital image correlation      pores     
Corresponding Authors: Yuelan DI,Ying LIU   
Just Accepted Date: 17 May 2019   Online First Date: 25 June 2019   
 Cite this article:   
Le WANG,Yuelan DI,Ying LIU, et al. Effect of TGO on the tensile failure behavior of thermal barrier coatings[J]. Front. Mech. Eng., 25 June 2019. [Epub ahead of print] doi: 10.1007/s11465-019-0541-2.
 URL:  
http://journal.hep.com.cn/fme/EN/10.1007/s11465-019-0541-2
http://journal.hep.com.cn/fme/EN/Y/V/I/0
Specimen Plasma gas/(L?min1) Plasma gas pressure/MPa Linear velocity/(m?min1) Current/A Voltage/V Spray distance/mm Single spraying thickness/mm Carrier gas/(L?min1) Powder feed rate/(g?min1)
NiCrAlY Ar 200, H2 12.9 Ar 0.7, H2 0.5 45 400 150 100 0.02 10 40
8YSZ Ar 40, H2 3 Ar 0.7, H2 0.5 45 450 140 100 0.01 10 40
Tab.1  Spraying parameters of NiCrAlY and 8YSZ
Fig.1  TGO thickness measurement area
Fig.2  Thickness variation of TGO
Fig.3  SEM images and line sweep energy spectra of TGO at different oxidation times: (a, b) before oxidation, (c, d) at 10 h, (e, f) at 30 h, and (g, h) at 50 h
Fig.4  Variation in the surface strain of TBCs under uniform tensile load. (a) Cloud surface strain change with time; (b) strain curves of the coating surface with time
Fig.5  Corresponding relationship between stress and strain of the substrate and AE signals as they change with time under tensile load. (a) 0 h; (b) 10 h; (c) 30 h; (d) 50 h
Fig.6  Schematic of the influence of pores at the interface of TGO and the bonding layer on TBCs under tensile load
1 A G Evans, D R Mumm, J W Hutchinson, et al.Mechanisms controlling the durability of thermal barrier coatings. Progress in Materials Science, 2001, 46(5): 505–553
https://doi.org/10.1016/S0079-6425(00)00020-7
2 Q Zhang, C J Li, Y Li, et al.Thermal failure of nanostructured thermal barrier coatings with cold-sprayed nanostructured NiCrAlY bond coat. Journal of Thermal Spray Technology, 2008, 17(5–6): 838–845
https://doi.org/10.1007/s11666-008-9223-z
3 N P Padture, M Gell, E H Jordan. Thermal barrier coatings for gas-turbine engine applications. Science, 2002, 296(5566): 280–284
https://doi.org/10.1126/science.1068609
4 J Toscano, D Naumenko, A Gil, et al.Parameters affecting TGO growth rate and the lifetime of TBC systems with MCrAlY-bondcoats. Materials and Corrosion, 2008, 59(6): 501–507
https://doi.org/10.1002/maco.200804134
5 K Torkashvand, E Poursaeidi. Effect of temperature and ceramic bonding on BC oxidation behavior in plasma-sprayed thermal barrier coatings. Surface and Coatings Technology, 2018, 349: 177–185
https://doi.org/10.1016/j.surfcoat.2018.05.069
6 C Che, G Q Wu, H Y Qi, et al.Uneven growth of thermally grown oxide and stress distribution in plasma-sprayed thermal barrier coatings. Surface and Coatings Technology, 2009, 203(20–21): 3088–3091
https://doi.org/10.1016/j.surfcoat.2009.03.031
7 Y Z Liu, S J Zheng, Y L Zhu, et al.Microstructural evolution at interfaces of thermal barrier coatings during isothermal oxidation. Journal of the European Ceramic Society, 2016, 36(7): 1765–1774
https://doi.org/10.1016/j.jeurceramsoc.2016.02.011
8 Y Hu, C Y Cai, Y G Wang, et al.YSZ/NiCrAlY interface oxidation of APS thermal barrier coatings. Corrosion Science, 2018, 142: 22–30
https://doi.org/10.1016/j.corsci.2018.06.035
9 Y Li, C J Li, Q Zhang, et al.Effect of chemical compositions and surface morphologies of MCrAlY coating on its isothermal oxidation behavior. Journal of Thermal Spray Technology, 2011, 20(1–2): 121–131
https://doi.org/10.1007/s11666-010-9590-0
10 S F Zhou, Z Xiong, J B Lei, et al.Influence of milling time on the microstructure evolution and oxidation behavior of NiCrAlY coatings by laser induction hybrid cladding. Corrosion Science, 2016, 103: 105–116
https://doi.org/10.1016/j.corsci.2015.11.011
11 S Tailor, A Modi, S C Modi. Effect of controlled segmentation on the thermal cycling behavior of plasma sprayed YSZ thick coatings. Ceramics International, 2018, 44(6): 6762–6768
https://doi.org/10.1016/j.ceramint.2018.01.094
12 H E Evans. Oxidation failure of TBC systems: An assessment of mechanisms. Surface and Coatings Technology, 2011, 206(7): 1512–1521
https://doi.org/10.1016/j.surfcoat.2011.05.053
13 Q M Yu, L Cen, Y Wang. Numerical study of residual stress and crack nucleation in thermal barrier coating system with plane model. Ceramics International, 2018, 44(5): 5116–5123
https://doi.org/10.1016/j.ceramint.2017.12.112
14 Q Shen, L Yang, Y C Zhou, et al.Effects of growth stress in finite-deformation thermally grown oxide on failure mechanism of thermal barrier coatings. Mechanics of Materials, 2017, 114: 228–242
https://doi.org/10.1016/j.mechmat.2017.08.011
15 L Yang, T T Yang, Y C Zhou, et al.Acoustic emission monitoring and damage mode discrimination of APS thermal barrier coatings under high temperature CMAS corrosion. Surface and Coatings Technology, 2016, 304: 272–282
https://doi.org/10.1016/j.surfcoat.2016.06.080
16 L Yang, Z C Zhong, J You, et al.Acoustic emission evaluation of fracture characteristics in thermal barrier coatings under bending. Surface and Coatings Technology, 2013, 232(10): 710–718
https://doi.org/10.1016/j.surfcoat.2013.06.085
17 L Wang, J X Ni, F Shao, et al.Failure behavior of plasma-sprayed yttria-stabilized zirconia thermal barrier coatings under three-point bending test via acoustic emission technique. Journal of Thermal Spray Technology, 2017, 26(1–2): 116–131
https://doi.org/10.1007/s11666-016-0497-2
18 W B Yao, C Y Dai, W G Mao, et al.Acoustic emission analysis on tensile failure of air plasma-sprayed thermal barrier coatings. Surface and Coatings Technology, 2012, 206(18): 3803–3807
https://doi.org/10.1016/j.surfcoat.2012.03.050
19 Q Shen, L Yang, Y C Zhou, et al.Models for predicting TGO growth to rough interface in TBCs. Surface and Coatings Technology, 2017, 325: 219–228
https://doi.org/10.1016/j.surfcoat.2017.06.001
20 S Gürgen, S F Diltemiz, M C Kushan. Oxidation and thermal shock behavior of thermal barrier coated 18/10CrNi alloy with coating modifications. Journal of Mechanical Science and Technology, 2017, 31(1): 149–155
https://doi.org/10.1007/s12206-016-1214-2
21 T Baskaran, S B Arya. Role of thermally grown oxide and oxidation resistance of samarium strontium aluminate based air plasma sprayed ceramic thermal barrier coatings. Surface and Coatings Technology, 2017, 326: 299–309
https://doi.org/10.1016/j.surfcoat.2017.07.049
22 K K Ma, X C Tang, J M Schoenung. Mechanistic investigation into the role of aluminum diffusion in the oxidation behavior of cryomilled NiCrAlY bond coat. Journal of Wuhan University of Technology-Materials Science Edition, 2016, 31(1): 35–43
https://doi.org/10.1007/s11595-016-1326-7
23 X J Liu, T Wang, C C Li, et al.Microstructural evolution and growth kinetics of thermally grown oxides in plasma sprayed thermal barrier coatings. Progress in Natural Science-Materials International, 2016, 26(1): 103–111
https://doi.org/10.1016/j.pnsc.2016.01.004
24 A Keyvani, M Bahamirian. Oxidation resistance of Al2O3-nanostructured/CSZ composite compared to conventional CSZ and YSZ thermal barrier coatings. Materials Research Express, 2016, 3(10): 105047
https://doi.org/10.1088/2053-1591/3/10/105047
25 G Y Liang, C Zhu, X Y Wu, et al.The formation model of Ni-Cr oxides on NiCoCrAlY-sprayed coating. Applied Surface Science, 2011, 257(15): 6468–6473
https://doi.org/10.1016/j.apsusc.2011.02.044
26 Z Suo, D V Kubair, A G Evans, et al.Stresses induced in alloys by selective oxidation. Acta Materialia, 2003, 51(4): 959–974
https://doi.org/10.1016/S1359-6454(02)00499-8
27 S Pal, D V Kubair. Finite element simulations of microvoid growth due to selective oxidation in binary alloys. Modelling and Simulation in Materials Science and Engineering, 2006, 14(7): 1211–1223
https://doi.org/10.1088/0965-0393/14/7/009
28 Q M Yu, L Cen. Residual stress distribution along interfaces in thermal barrier coating system under thermal cycles. Ceramics International, 2017, 43(3): 3089–3100
https://doi.org/10.1016/j.ceramint.2016.11.119
29 S Wei, G Wang, J Yu, et al.Competitive failure analysis on tensile fracture of laser-deposited material for martensitic stainless steel. Materials & Design, 2017, 118: 1–10
https://doi.org/10.1016/j.matdes.2017.01.014
Related articles from Frontiers Journals
[1] Pengwan CHEN, Zhongbin ZHOU, Shaopeng MA, Qinwei MA, Fenglei HUANG. Measurement of dynamic fracture toughness and failure behavior for explosive mock materials[J]. Front Mech Eng, 2011, 6(3): 292-295.
[2] Kirsten BOBZIN, Lidong ZHAO, Thomas SCHLAEFER, Thomas WARDA. Preparation and characterization of nanocrystalline ZrO2-7%Y2O3 powders for thermal barrier coatings by high-energy ball milling[J]. Front Mech Eng, 2011, 6(2): 176-181.
Viewed
Full text


Abstract

Cited

  Shared   0
  Discussed