Experimental and mathematical modelling of corrosion behaviour of CMAS coated oxide/oxide CMCs

Karthik Ramachandran; Brace Chaffey; Carmine Zuccarini; Joseph C. Bear; Doni Daniel Jayaseelan

doi:10.1016/j.ceramint.2022.09.294

Experimental and mathematical modelling of corrosion behaviour of CMAS coated oxide/oxide CMCs

Karthik Ramachandran, Brace Chaffey, Carmine Zuccarini, Joseph C. Bear, Doni Daniel Jayaseelan

Kingston University

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

4 Citations (Scopus)

81 Downloads (Pure)

Abstract

CMAS corrosion of turbine blades is a crucial failure in turbine engines and their components. In this study, oxide/oxide CMCs (AS-N610), which are candidates for gas turbine (GT) applications, are investigated for its corrosion behaviour at different temperatures and time in presence of CMAS. The corrosion studies using CMAS coating of the CMCs reveal that CMCs had a weight gain of ∼6% owing to formation of α-Al ₂O ₃ at 1000 °C. The SE image indicated the penetration of CMAS into the porous CMC. At 1000 °C, CMAS degraded to form a black glassy substance (Calcium alumino silicate) with traces of Mg which led to corrosion of the matrix. Indentation fracture toughness of the oxide/oxide CMCs was 7.78 ± 0.5 MPa m ^0.5 which degraded by ∼12% at 1000 °C after 10 h in the presence of CMAS. A mathematical model derived through diffusion equation indicated weight gain of ∼0.3 g which was closer to experimental data.

Original language	English
Pages (from-to)	4213-4221
Number of pages	9
Journal	Ceramics International
Volume	49
Issue number	3
Early online date	26 Sept 2022
DOIs	https://doi.org/10.1016/j.ceramint.2022.09.294
Publication status	Published - 1 Feb 2023
Externally published	Yes

Bibliographical note

Keywords

Oxide-oxide CMCs
Corrosion behaviour
CMAS
Fracture toughness and discussion model

Access to Document

10.1016/j.ceramint.2022.09.294Licence: CC BY-NC-ND

PublishedFinal published version, 7.07 MBLicence: CC BY-NC-ND
1-s2.0-S0272884222034939-mainFinal published version, 6.73 MBLicence: CC BY-NC-ND

Cite this

@article{5260ab56e6d543a79efdad6176156b60,

title = "Experimental and mathematical modelling of corrosion behaviour of CMAS coated oxide/oxide CMCs",

abstract = "CMAS corrosion of turbine blades is a crucial failure in turbine engines and their components. In this study, oxide/oxide CMCs (AS-N610), which are candidates for gas turbine (GT) applications, are investigated for its corrosion behaviour at different temperatures and time in presence of CMAS. The corrosion studies using CMAS coating of the CMCs reveal that CMCs had a weight gain of ∼6% owing to formation of α-Al 2O 3 at 1000 °C. The SE image indicated the penetration of CMAS into the porous CMC. At 1000 °C, CMAS degraded to form a black glassy substance (Calcium alumino silicate) with traces of Mg which led to corrosion of the matrix. Indentation fracture toughness of the oxide/oxide CMCs was 7.78 ± 0.5 MPa m 0.5 which degraded by ∼12% at 1000 °C after 10 h in the presence of CMAS. A mathematical model derived through diffusion equation indicated weight gain of ∼0.3 g which was closer to experimental data.",

keywords = "Oxide-oxide CMCs, Corrosion behaviour, CMAS, Fracture toughness and discussion model",

author = "Karthik Ramachandran and Brace Chaffey and Carmine Zuccarini and Bear, {Joseph C.} and Jayaseelan, {Doni Daniel}",

note = "{\textcopyright} 2022 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/bync-nd/4.0/). ",

year = "2023",

month = feb,

day = "1",

doi = "10.1016/j.ceramint.2022.09.294",

language = "English",

volume = "49",

pages = "4213--4221",

journal = "Ceramics International",

issn = "0272-8842",

publisher = "Elsevier",

number = "3",

}

TY - JOUR

T1 - Experimental and mathematical modelling of corrosion behaviour of CMAS coated oxide/oxide CMCs

AU - Ramachandran, Karthik

AU - Chaffey, Brace

AU - Zuccarini, Carmine

AU - Bear, Joseph C.

AU - Jayaseelan, Doni Daniel

PY - 2023/2/1

Y1 - 2023/2/1

N2 - CMAS corrosion of turbine blades is a crucial failure in turbine engines and their components. In this study, oxide/oxide CMCs (AS-N610), which are candidates for gas turbine (GT) applications, are investigated for its corrosion behaviour at different temperatures and time in presence of CMAS. The corrosion studies using CMAS coating of the CMCs reveal that CMCs had a weight gain of ∼6% owing to formation of α-Al 2O 3 at 1000 °C. The SE image indicated the penetration of CMAS into the porous CMC. At 1000 °C, CMAS degraded to form a black glassy substance (Calcium alumino silicate) with traces of Mg which led to corrosion of the matrix. Indentation fracture toughness of the oxide/oxide CMCs was 7.78 ± 0.5 MPa m 0.5 which degraded by ∼12% at 1000 °C after 10 h in the presence of CMAS. A mathematical model derived through diffusion equation indicated weight gain of ∼0.3 g which was closer to experimental data.

AB - CMAS corrosion of turbine blades is a crucial failure in turbine engines and their components. In this study, oxide/oxide CMCs (AS-N610), which are candidates for gas turbine (GT) applications, are investigated for its corrosion behaviour at different temperatures and time in presence of CMAS. The corrosion studies using CMAS coating of the CMCs reveal that CMCs had a weight gain of ∼6% owing to formation of α-Al 2O 3 at 1000 °C. The SE image indicated the penetration of CMAS into the porous CMC. At 1000 °C, CMAS degraded to form a black glassy substance (Calcium alumino silicate) with traces of Mg which led to corrosion of the matrix. Indentation fracture toughness of the oxide/oxide CMCs was 7.78 ± 0.5 MPa m 0.5 which degraded by ∼12% at 1000 °C after 10 h in the presence of CMAS. A mathematical model derived through diffusion equation indicated weight gain of ∼0.3 g which was closer to experimental data.

KW - Oxide-oxide CMCs

KW - Corrosion behaviour

KW - CMAS

KW - Fracture toughness and discussion model

UR - http://www.scopus.com/inward/record.url?scp=85139024598&partnerID=8YFLogxK

U2 - 10.1016/j.ceramint.2022.09.294

DO - 10.1016/j.ceramint.2022.09.294

M3 - Article

SN - 0272-8842

VL - 49

SP - 4213

EP - 4221

JO - Ceramics International

JF - Ceramics International

IS - 3

ER -

Experimental and mathematical modelling of corrosion behaviour of CMAS coated oxide/oxide CMCs

Abstract

Bibliographical note

Keywords

Access to Document

Other files and links

Fingerprint

Cite this