High-Temperature Oxidation Resistance Mechanism and Thermal Shock Performance of CoCrTaAlY/YSZ Thermal Barrier Coatings Fabricated Using Plasma Spraying and Laser Cladding

被引：0
作者：
Gu Z. [1 ]
Lei J. [1 ]
Dou J. [1 ]
Guo J. [1 ]
机构：
[1] Laser Technology Institute, Tianjin Polytechnic University, Tianjin
来源：
Zhongguo Jiguang/Chinese Journal of Lasers | 2019年 / 46卷 / 08期
关键词：
High temperature oxidation; Laser cladding; Laser technology; Microstructure; Thermal barrier coatings; Thermal shock performance;
D O I：
10.3788/CJL201946.0802007
中图分类号：
学科分类号：
摘要：
CoCrTaAlY/YSZ thermal barrier coatings (TBCs) are fabricated by diode laser cladding and plasma spraying on a 1Cr13 steel substrate. The morphologies of coatings are observed by the scanning electronic microscopy, the composition distribution is analyzed through energy dispersive spectroscopy, and the phase composition is characterized by X-ray diffractometer. The results demonstrate that the phase composition of a YSZ coating comprises cubic ZrO2 (c-ZrO2), tetragonal ZrO2 (t-ZrO2), and a small amount of monoclinic ZrO2 (m-ZrO2). The bonding layer has typical rapid melting microstructure characteristics and metallurgical bonds with the substrate. The thermal shock performance and high-temperature oxidation resistance mechanism of TBCs as well as their failure behavior are investigated. The results show that the formation of Al2O3 oxide film can prevent the diffusion of oxygen. Consequently, the high-temperature oxidation resistance of TBCs is about 4.1 times that of the substrate (the cumulative oxidation weight gain of the YSZ coating is only 0.08 g•cm-2). The YSZ coating appears to crack for the first time after it undergoes 20 thermal shocks at 900℃. The cracks gradually become larger as the number of thermal shocks increases, and the coating breaks completely after 30 thermal shocks. © 2019, Chinese Lasers Press. All right reserved.
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共 16 条
[1]  
Zhou F.F., Wang Y., Wang L., Et al., High temperature oxidation and insulation behavior of plasma-sprayed nanostructured thermal barrier coatings, Journal of Alloys and Compounds, 704, pp. 614-623, (2017)
[2]  
Wang Y.Z., Li J.L., Liu H.Z., Et al., Study on thermal resistance performance of 8YSZ thermal barrier coatings, International Journal of Thermal Sciences, 122, pp. 12-25, (2017)
[3]  
Han M., Zhou G.D., Huang J.H., Et al., Optimization selection of the thermal conductivity of the top ceramic layer in the double-ceramic-layer thermal barrier coatings based on the finite element analysis of thermal insulation, Surface and Coatings Technology, 240, pp. 320-326, (2014)
[4]  
Bernard B., Quet A., Bianchi L., Et al., Thermal insulation properties of YSZ coatings: suspension plasma spraying (SPS) versus electron beam physical vapor deposition (EB-PVD) and atmospheric plasma spraying (APS), Surface and Coatings Technology, 318, pp. 122-128, (2017)
[5]  
Zhou S.F., Liu J., Xiong Z., Et al., Research progress on improving the high-temperature oxidation resistance of MCrAlY coatings, Laser & Optoelectronics Progress, 52, 12, (2015)
[6]  
Bakan E., Mack D.E., Mauer G., Et al., Gadolinium zirconate/YSZ thermal barrier coatings: plasma spraying, microstructure, and thermal cycling behavior, Journal of the American Ceramic Society, 97, 12, pp. 4045-4051, (2014)
[7]  
Xu Z.H., He L.M., Mu R.D., Et al., Double-ceramic-layer thermal barrier coatings based on La<sub>2</sub>(Zr<sub>0.7</sub>Ce<sub>0.3</sub>)<sub>2</sub>O<sub>7</sub>/La<sub>2</sub>Ce<sub>2</sub>O<sub>7</sub> deposited by electron beam-physical vapor deposition, Applied Surface Science, 256, 11, pp. 3661-3668, (2010)
[8]  
Pereira J.C., Zambrano J.C., Rayon E., Et al., Mechanical and microstructural characterization of MCrAlY coatings produced by laser cladding: the influence of the Ni, Co and Al content, Surface and Coatings Technology, 338, pp. 22-31, (2018)
[9]  
Zhou S.F., Dai X.Q., Xiong Z., Et al., Functionally graded YSZ/NiCrAlY coating prepared by laser induction hybrid rapid cladding, Chinese Journal of Lasers, 40, 4, (2013)
[10]  
Rezanka S., Somsen C., Eggeler G., Et al., A TEM investigation of columnar-structured thermal barrier coatings deposited by plasma spray-physical vapor deposition (PS-PVD), Plasma Chemistry and Plasma Processing, 38, 4, pp. 791-802, (2018)
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