Comparison of hot corrosion behavior of nanostructured ScYSZ and YSZ thermal barrier coatings

M. R. Loghman-Estarki; R. Shoja Razavi; H. Edris; S. R. Bakhshi; M. Nejati; H. Jamali

doi:10.1016/j.ceramint.2016.01.147

Comparison of hot corrosion behavior of nanostructured ScYSZ and YSZ thermal barrier coatings

M. R. Loghman-Estarki, R. Shoja Razavi, H. Edris, S. R. Bakhshi, M. Nejati, H. Jamali

Research output: Journal Publication › Article › peer-review

82 Citations (Scopus)

Abstract

Hot corrosion behavior of nanostructured scandia (3.6 mol%) and yttria (0.4 mol%) stabilized zirconia (4ScYSZ) and yttria stabilized zirconia (4YSZ) were investigated. Thus, duplex TBCs (thermal barrier coatings), composed of a bond coat (NiCrAlY) and a top coat (4ScYSZ or 4YSZ), were deposited on the IN738LC Ni-based supperalloy by atmospheric plasma spraying (APS). Hot corrosion studies of plasma sprayed TBCs were conducted in 45 wt% Na₂SO₄+55 wt% V₂O₅ molten salt at 910 °C for different times. Based on the results, it was revealed that ScYSZ coating has more hot corrosion resistance than YSZ coatings. Moreover, the mechanisms of degradation of both TBCs under corrosion salt were suggested.

Original language	English
Pages (from-to)	7432-7439
Number of pages	8
Journal	Ceramics International
Volume	42
Issue number	6
DOIs	https://doi.org/10.1016/j.ceramint.2016.01.147
Publication status	Published - 1 May 2016
Externally published	Yes

Keywords

Atmospheric plasma spray
Hot corrosion
Nanostructured Thermal barrier coating
ScYSZ
YSZ

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Process Chemistry and Technology
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/j.ceramint.2016.01.147

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title = "Comparison of hot corrosion behavior of nanostructured ScYSZ and YSZ thermal barrier coatings",

abstract = "Hot corrosion behavior of nanostructured scandia (3.6 mol\%) and yttria (0.4 mol\%) stabilized zirconia (4ScYSZ) and yttria stabilized zirconia (4YSZ) were investigated. Thus, duplex TBCs (thermal barrier coatings), composed of a bond coat (NiCrAlY) and a top coat (4ScYSZ or 4YSZ), were deposited on the IN738LC Ni-based supperalloy by atmospheric plasma spraying (APS). Hot corrosion studies of plasma sprayed TBCs were conducted in 45 wt\% Na2SO4+55 wt\% V2O5 molten salt at 910 °C for different times. Based on the results, it was revealed that ScYSZ coating has more hot corrosion resistance than YSZ coatings. Moreover, the mechanisms of degradation of both TBCs under corrosion salt were suggested.",

keywords = "Atmospheric plasma spray, Hot corrosion, Nanostructured Thermal barrier coating, ScYSZ, YSZ",

author = "Loghman-Estarki, \{M. R.\} and \{Shoja Razavi\}, R. and H. Edris and Bakhshi, \{S. R.\} and M. Nejati and H. Jamali",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier Ltd and Techna Group S.r.l.",

year = "2016",

month = may,

day = "1",

doi = "10.1016/j.ceramint.2016.01.147",

language = "English",

volume = "42",

pages = "7432--7439",

journal = "Ceramics International",

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T1 - Comparison of hot corrosion behavior of nanostructured ScYSZ and YSZ thermal barrier coatings

AU - Loghman-Estarki, M. R.

AU - Shoja Razavi, R.

AU - Edris, H.

AU - Bakhshi, S. R.

AU - Nejati, M.

AU - Jamali, H.

PY - 2016/5/1

Y1 - 2016/5/1

N2 - Hot corrosion behavior of nanostructured scandia (3.6 mol%) and yttria (0.4 mol%) stabilized zirconia (4ScYSZ) and yttria stabilized zirconia (4YSZ) were investigated. Thus, duplex TBCs (thermal barrier coatings), composed of a bond coat (NiCrAlY) and a top coat (4ScYSZ or 4YSZ), were deposited on the IN738LC Ni-based supperalloy by atmospheric plasma spraying (APS). Hot corrosion studies of plasma sprayed TBCs were conducted in 45 wt% Na2SO4+55 wt% V2O5 molten salt at 910 °C for different times. Based on the results, it was revealed that ScYSZ coating has more hot corrosion resistance than YSZ coatings. Moreover, the mechanisms of degradation of both TBCs under corrosion salt were suggested.

AB - Hot corrosion behavior of nanostructured scandia (3.6 mol%) and yttria (0.4 mol%) stabilized zirconia (4ScYSZ) and yttria stabilized zirconia (4YSZ) were investigated. Thus, duplex TBCs (thermal barrier coatings), composed of a bond coat (NiCrAlY) and a top coat (4ScYSZ or 4YSZ), were deposited on the IN738LC Ni-based supperalloy by atmospheric plasma spraying (APS). Hot corrosion studies of plasma sprayed TBCs were conducted in 45 wt% Na2SO4+55 wt% V2O5 molten salt at 910 °C for different times. Based on the results, it was revealed that ScYSZ coating has more hot corrosion resistance than YSZ coatings. Moreover, the mechanisms of degradation of both TBCs under corrosion salt were suggested.

KW - Atmospheric plasma spray

KW - Hot corrosion

KW - Nanostructured Thermal barrier coating

KW - ScYSZ

KW - YSZ

UR - https://www.scopus.com/pages/publications/84959911275

U2 - 10.1016/j.ceramint.2016.01.147

DO - 10.1016/j.ceramint.2016.01.147

M3 - Article

AN - SCOPUS:84959911275

SN - 0272-8842

VL - 42

SP - 7432

EP - 7439

JO - Ceramics International

JF - Ceramics International

IS - 6

ER -

Comparison of hot corrosion behavior of nanostructured ScYSZ and YSZ thermal barrier coatings

Abstract

Keywords

ASJC Scopus subject areas

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