Effect of vacuum pre-oxidation treatment on oxidation behavior of thermal barrier coating

Zhong Du; Quan Sheng Wang; Yan Bo Liu; Yun Kai Li

doi:10.11868/j.issn.1005-5053.2015.5.005

Effect of vacuum pre-oxidation treatment on oxidation behavior of thermal barrier coating

Zhong Du, Quan Sheng Wang^*, Yan Bo Liu, Yun Kai Li

^*Corresponding author for this work

School of Material Science and Engineering

Beijing Institute of Technology

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

NiCoCrAlY bond coating was prepared by high velocity oxy-fuel (HVOF) spray and top coating was prepared by plasma spray. Pre-oxidation was conducted before the high temperature isothermal oxidation. Effect of vacuum pre-oxidation on the oxidation behavior of thermal barrier coatings was studied by high temperature static oxidation experiment. The results show that a dense and continuous α-Al₂O₃ film is formed after the pre-oxidation treatment. After oxidation for 800 h at 1050℃, a TGO, composed of α-Al₂O₃ and a large amout of spinel-type oxides, was formed in as-sprayed coating. On the contrary, a TGO, mainly composed of α-Al₂O₃, is formed in the coating after pre-oxidation treatment. Pre-oxidation treatment can postpone the formation of spinel oxide effectively and then slow down the growth rate of thermally grown oxide (TGO).

Original language	English
Pages (from-to)	27-31
Number of pages	5
Journal	Hangkong Cailiao Xuebao/Journal of Aeronautical Materials
Volume	35
Issue number	5
DOIs	https://doi.org/10.11868/j.issn.1005-5053.2015.5.005
Publication status	Published - 1 Oct 2015

Keywords

High temperature oxidation
Thermal barrier coating
Thermally grown oxide
Vacuum pre-oxidation

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Du, Z., Wang, Q. S., Liu, Y. B., & Li, Y. K. (2015). Effect of vacuum pre-oxidation treatment on oxidation behavior of thermal barrier coating. Hangkong Cailiao Xuebao/Journal of Aeronautical Materials, 35(5), 27-31. https://doi.org/10.11868/j.issn.1005-5053.2015.5.005

@article{c6178754ae95430c94bb8e63d9a24482,

title = "Effect of vacuum pre-oxidation treatment on oxidation behavior of thermal barrier coating",

abstract = "NiCoCrAlY bond coating was prepared by high velocity oxy-fuel (HVOF) spray and top coating was prepared by plasma spray. Pre-oxidation was conducted before the high temperature isothermal oxidation. Effect of vacuum pre-oxidation on the oxidation behavior of thermal barrier coatings was studied by high temperature static oxidation experiment. The results show that a dense and continuous α-Al2O3 film is formed after the pre-oxidation treatment. After oxidation for 800 h at 1050℃, a TGO, composed of α-Al2O3 and a large amout of spinel-type oxides, was formed in as-sprayed coating. On the contrary, a TGO, mainly composed of α-Al2O3, is formed in the coating after pre-oxidation treatment. Pre-oxidation treatment can postpone the formation of spinel oxide effectively and then slow down the growth rate of thermally grown oxide (TGO).",

keywords = "High temperature oxidation, Thermal barrier coating, Thermally grown oxide, Vacuum pre-oxidation",

author = "Zhong Du and Wang, {Quan Sheng} and Liu, {Yan Bo} and Li, {Yun Kai}",

year = "2015",

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doi = "10.11868/j.issn.1005-5053.2015.5.005",

language = "English",

volume = "35",

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TY - JOUR

T1 - Effect of vacuum pre-oxidation treatment on oxidation behavior of thermal barrier coating

AU - Du, Zhong

AU - Wang, Quan Sheng

AU - Liu, Yan Bo

AU - Li, Yun Kai

PY - 2015/10/1

Y1 - 2015/10/1

N2 - NiCoCrAlY bond coating was prepared by high velocity oxy-fuel (HVOF) spray and top coating was prepared by plasma spray. Pre-oxidation was conducted before the high temperature isothermal oxidation. Effect of vacuum pre-oxidation on the oxidation behavior of thermal barrier coatings was studied by high temperature static oxidation experiment. The results show that a dense and continuous α-Al2O3 film is formed after the pre-oxidation treatment. After oxidation for 800 h at 1050℃, a TGO, composed of α-Al2O3 and a large amout of spinel-type oxides, was formed in as-sprayed coating. On the contrary, a TGO, mainly composed of α-Al2O3, is formed in the coating after pre-oxidation treatment. Pre-oxidation treatment can postpone the formation of spinel oxide effectively and then slow down the growth rate of thermally grown oxide (TGO).

AB - NiCoCrAlY bond coating was prepared by high velocity oxy-fuel (HVOF) spray and top coating was prepared by plasma spray. Pre-oxidation was conducted before the high temperature isothermal oxidation. Effect of vacuum pre-oxidation on the oxidation behavior of thermal barrier coatings was studied by high temperature static oxidation experiment. The results show that a dense and continuous α-Al2O3 film is formed after the pre-oxidation treatment. After oxidation for 800 h at 1050℃, a TGO, composed of α-Al2O3 and a large amout of spinel-type oxides, was formed in as-sprayed coating. On the contrary, a TGO, mainly composed of α-Al2O3, is formed in the coating after pre-oxidation treatment. Pre-oxidation treatment can postpone the formation of spinel oxide effectively and then slow down the growth rate of thermally grown oxide (TGO).

KW - High temperature oxidation

KW - Thermal barrier coating

KW - Thermally grown oxide

KW - Vacuum pre-oxidation

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U2 - 10.11868/j.issn.1005-5053.2015.5.005

DO - 10.11868/j.issn.1005-5053.2015.5.005

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SN - 1005-5053

VL - 35

SP - 27

EP - 31

JO - Hangkong Cailiao Xuebao/Journal of Aeronautical Materials

JF - Hangkong Cailiao Xuebao/Journal of Aeronautical Materials

IS - 5

ER -

Effect of vacuum pre-oxidation treatment on oxidation behavior of thermal barrier coating

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Keywords

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