Vertical grain and columnar structured Ba(Mg1/3Ta2/3)O3 thermal barrier coating deposited by solution precursor plasma spray

Huidong Hou; Jocelyn Veilleux; François Gitzhofer; Quansheng Wang

doi:10.1016/j.surfcoat.2020.125803

Vertical grain and columnar structured Ba(Mg_1/3Ta_2/3)O₃ thermal barrier coating deposited by solution precursor plasma spray

Huidong Hou, Jocelyn Veilleux^*, François Gitzhofer, Quansheng Wang

^*Corresponding author for this work

School of Material Science and Engineering

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

13 Citations (Scopus)

Abstract

Thermal barrier coatings (TBC) with a lamellar structure are more susceptible to erosion than fully dense ceramics and electron beam physical vapor deposited (EB-PVD) coatings. This paper presents a distinctive structure of Ba(Mg_1/3Ta_2/3)O₃ (BMT) with a columnar-oriented appearance and vertical grain nature, which was deposited by plasma spray rather than EB-PVD. Indeed, a radio frequency solution precursor plasma spray (RF SPPS) process was adopted for the coating deposition. The morphology and elemental composition of the vertical grains are analyzed first. With the assistance of optical emission spectroscopy (OES), the formation mechanism of the vertical grains is discussed in detail. In addition, a new TBC system designed for niobium alloy is proposed in this paper. Owing to its high thermal expansion coefficient and unique vertical grain structure, BMT has been considered as the most promising insulation material candidate in this TBC system.

Original language	English
Article number	125803
Journal	Surface and Coatings Technology
Volume	393
DOIs	https://doi.org/10.1016/j.surfcoat.2020.125803
Publication status	Published - 15 Jul 2020

Keywords

BMT
Columnar structure
RF SPPS
Solution precursor plasma spray
Thermal barrier coatings
Vertical grains

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10.1016/j.surfcoat.2020.125803

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title = "Vertical grain and columnar structured Ba(Mg1/3Ta2/3)O3 thermal barrier coating deposited by solution precursor plasma spray",

abstract = "Thermal barrier coatings (TBC) with a lamellar structure are more susceptible to erosion than fully dense ceramics and electron beam physical vapor deposited (EB-PVD) coatings. This paper presents a distinctive structure of Ba(Mg1/3Ta2/3)O3 (BMT) with a columnar-oriented appearance and vertical grain nature, which was deposited by plasma spray rather than EB-PVD. Indeed, a radio frequency solution precursor plasma spray (RF SPPS) process was adopted for the coating deposition. The morphology and elemental composition of the vertical grains are analyzed first. With the assistance of optical emission spectroscopy (OES), the formation mechanism of the vertical grains is discussed in detail. In addition, a new TBC system designed for niobium alloy is proposed in this paper. Owing to its high thermal expansion coefficient and unique vertical grain structure, BMT has been considered as the most promising insulation material candidate in this TBC system.",

keywords = "BMT, Columnar structure, RF SPPS, Solution precursor plasma spray, Thermal barrier coatings, Vertical grains",

author = "Huidong Hou and Jocelyn Veilleux and Fran{\c c}ois Gitzhofer and Quansheng Wang",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier B.V.",

year = "2020",

month = jul,

day = "15",

doi = "10.1016/j.surfcoat.2020.125803",

language = "English",

volume = "393",

journal = "Surface and Coatings Technology",

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publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Vertical grain and columnar structured Ba(Mg1/3Ta2/3)O3 thermal barrier coating deposited by solution precursor plasma spray

AU - Hou, Huidong

AU - Veilleux, Jocelyn

AU - Gitzhofer, François

AU - Wang, Quansheng

PY - 2020/7/15

Y1 - 2020/7/15

N2 - Thermal barrier coatings (TBC) with a lamellar structure are more susceptible to erosion than fully dense ceramics and electron beam physical vapor deposited (EB-PVD) coatings. This paper presents a distinctive structure of Ba(Mg1/3Ta2/3)O3 (BMT) with a columnar-oriented appearance and vertical grain nature, which was deposited by plasma spray rather than EB-PVD. Indeed, a radio frequency solution precursor plasma spray (RF SPPS) process was adopted for the coating deposition. The morphology and elemental composition of the vertical grains are analyzed first. With the assistance of optical emission spectroscopy (OES), the formation mechanism of the vertical grains is discussed in detail. In addition, a new TBC system designed for niobium alloy is proposed in this paper. Owing to its high thermal expansion coefficient and unique vertical grain structure, BMT has been considered as the most promising insulation material candidate in this TBC system.

AB - Thermal barrier coatings (TBC) with a lamellar structure are more susceptible to erosion than fully dense ceramics and electron beam physical vapor deposited (EB-PVD) coatings. This paper presents a distinctive structure of Ba(Mg1/3Ta2/3)O3 (BMT) with a columnar-oriented appearance and vertical grain nature, which was deposited by plasma spray rather than EB-PVD. Indeed, a radio frequency solution precursor plasma spray (RF SPPS) process was adopted for the coating deposition. The morphology and elemental composition of the vertical grains are analyzed first. With the assistance of optical emission spectroscopy (OES), the formation mechanism of the vertical grains is discussed in detail. In addition, a new TBC system designed for niobium alloy is proposed in this paper. Owing to its high thermal expansion coefficient and unique vertical grain structure, BMT has been considered as the most promising insulation material candidate in this TBC system.

KW - BMT

KW - Columnar structure

KW - RF SPPS

KW - Solution precursor plasma spray

KW - Thermal barrier coatings

KW - Vertical grains

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U2 - 10.1016/j.surfcoat.2020.125803

DO - 10.1016/j.surfcoat.2020.125803

M3 - Article

AN - SCOPUS:85083550602

SN - 0257-8972

VL - 393

JO - Surface and Coatings Technology

JF - Surface and Coatings Technology

M1 - 125803

ER -

Vertical grain and columnar structured Ba(Mg_1/3Ta_2/3)O₃ thermal barrier coating deposited by solution precursor plasma spray

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Keywords

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