Spreading and reaction behavior of CMAS-type silicate melts with multiphase Y and Gd aluminate-zirconate T/EBC materials

Eeshani P. Godbole; Nethmi Hewage; David L. Poerschke

doi:10.1016/j.jeurceramsoc.2023.05.046

Spreading and reaction behavior of CMAS-type silicate melts with multiphase Y and Gd aluminate-zirconate T/EBC materials

Eeshani P. Godbole, Nethmi Hewage, David L. Poerschke

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

2 Scopus citations

Abstract

Thermal and environmental barrier coatings must be robust against attack by calcium magnesium aluminosilicate (CMAS, or CMFAS with iron) deposits, and coatings that produce thin, uniform reaction layers are desirable. The reactions of four multiphase coating compositions in the AlO_1.5–REO_1.5–ZrO₂ systems (RE = Gd or Y) with three model CMFAS deposits were studied. Following CMFAS exposure for 1 h at 1400°C, some samples exhibited thin, uniform CMFAS reaction product layers, while others were less uniform with pockets of deep reactions. Coating materials with higher AlO_1.5 content produced uniform reaction layers, while the most SiO₂-rich CMFAS was most likely to produce a non-uniform response. Apatite was formed in all cases, while the Y was more likely than Gd to form aluminosilicate garnet and cuspidine reaction products. The results are discussed in terms of implications for CMFAS-resistant T/EBC design.

Original language	English (US)
Pages (from-to)	6416-6426
Number of pages	11
Journal	Journal of the European Ceramic Society
Volume	43
Issue number	14
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2023.05.046
State	Published - Nov 2023

Bibliographical note

Funding Information:
This research was supported by NASA award number 80NSSC21C0071 monitored by Dr. Cameron Bodenschatz, in collaboration with QuesTek Innovations LLC. N.H. was supported by the NSF REU program under Award Number DMR-1852044 and through the University of Minnesota MRSEC under Award Number DMR-2011401 . Part of this work was carried out in the Characterization Facility at the University of Minnesota, which receives partial support from the NSF through the MRSEC ( DMR-2011401 ) and the NNCI ( ECCS-2025124 ) programs. The sponsors were not involved in the detailed study design, or the data collection, analysis, or interpretation. The authors are grateful to Drs. Noriaki Arai, Pin Lu, and Jiadong Gong (QuesTek Innovations LLC) for the insightful discussions.

Publisher Copyright:
© 2023 Elsevier Ltd

Keywords

Aluminate
CMAS
Garnet
T/EBCs
Zirconate

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title = "Spreading and reaction behavior of CMAS-type silicate melts with multiphase Y and Gd aluminate-zirconate T/EBC materials",

abstract = "Thermal and environmental barrier coatings must be robust against attack by calcium magnesium aluminosilicate (CMAS, or CMFAS with iron) deposits, and coatings that produce thin, uniform reaction layers are desirable. The reactions of four multiphase coating compositions in the AlO1.5–REO1.5–ZrO2 systems (RE = Gd or Y) with three model CMFAS deposits were studied. Following CMFAS exposure for 1 h at 1400°C, some samples exhibited thin, uniform CMFAS reaction product layers, while others were less uniform with pockets of deep reactions. Coating materials with higher AlO1.5 content produced uniform reaction layers, while the most SiO2-rich CMFAS was most likely to produce a non-uniform response. Apatite was formed in all cases, while the Y was more likely than Gd to form aluminosilicate garnet and cuspidine reaction products. The results are discussed in terms of implications for CMFAS-resistant T/EBC design.",

keywords = "Aluminate, CMAS, Garnet, T/EBCs, Zirconate",

author = "Godbole, {Eeshani P.} and Nethmi Hewage and Poerschke, {David L.}",

note = "Funding Information: This research was supported by NASA award number 80NSSC21C0071 monitored by Dr. Cameron Bodenschatz, in collaboration with QuesTek Innovations LLC. N.H. was supported by the NSF REU program under Award Number DMR-1852044 and through the University of Minnesota MRSEC under Award Number DMR-2011401 . Part of this work was carried out in the Characterization Facility at the University of Minnesota, which receives partial support from the NSF through the MRSEC ( DMR-2011401 ) and the NNCI ( ECCS-2025124 ) programs. The sponsors were not involved in the detailed study design, or the data collection, analysis, or interpretation. The authors are grateful to Drs. Noriaki Arai, Pin Lu, and Jiadong Gong (QuesTek Innovations LLC) for the insightful discussions. Publisher Copyright: {\textcopyright} 2023 Elsevier Ltd",

year = "2023",

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doi = "10.1016/j.jeurceramsoc.2023.05.046",

language = "English (US)",

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AU - Godbole, Eeshani P.

AU - Hewage, Nethmi

AU - Poerschke, David L.

N1 - Funding Information: This research was supported by NASA award number 80NSSC21C0071 monitored by Dr. Cameron Bodenschatz, in collaboration with QuesTek Innovations LLC. N.H. was supported by the NSF REU program under Award Number DMR-1852044 and through the University of Minnesota MRSEC under Award Number DMR-2011401 . Part of this work was carried out in the Characterization Facility at the University of Minnesota, which receives partial support from the NSF through the MRSEC ( DMR-2011401 ) and the NNCI ( ECCS-2025124 ) programs. The sponsors were not involved in the detailed study design, or the data collection, analysis, or interpretation. The authors are grateful to Drs. Noriaki Arai, Pin Lu, and Jiadong Gong (QuesTek Innovations LLC) for the insightful discussions. Publisher Copyright: © 2023 Elsevier Ltd

PY - 2023/11

Y1 - 2023/11

N2 - Thermal and environmental barrier coatings must be robust against attack by calcium magnesium aluminosilicate (CMAS, or CMFAS with iron) deposits, and coatings that produce thin, uniform reaction layers are desirable. The reactions of four multiphase coating compositions in the AlO1.5–REO1.5–ZrO2 systems (RE = Gd or Y) with three model CMFAS deposits were studied. Following CMFAS exposure for 1 h at 1400°C, some samples exhibited thin, uniform CMFAS reaction product layers, while others were less uniform with pockets of deep reactions. Coating materials with higher AlO1.5 content produced uniform reaction layers, while the most SiO2-rich CMFAS was most likely to produce a non-uniform response. Apatite was formed in all cases, while the Y was more likely than Gd to form aluminosilicate garnet and cuspidine reaction products. The results are discussed in terms of implications for CMFAS-resistant T/EBC design.

AB - Thermal and environmental barrier coatings must be robust against attack by calcium magnesium aluminosilicate (CMAS, or CMFAS with iron) deposits, and coatings that produce thin, uniform reaction layers are desirable. The reactions of four multiphase coating compositions in the AlO1.5–REO1.5–ZrO2 systems (RE = Gd or Y) with three model CMFAS deposits were studied. Following CMFAS exposure for 1 h at 1400°C, some samples exhibited thin, uniform CMFAS reaction product layers, while others were less uniform with pockets of deep reactions. Coating materials with higher AlO1.5 content produced uniform reaction layers, while the most SiO2-rich CMFAS was most likely to produce a non-uniform response. Apatite was formed in all cases, while the Y was more likely than Gd to form aluminosilicate garnet and cuspidine reaction products. The results are discussed in terms of implications for CMFAS-resistant T/EBC design.

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KW - Garnet

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KW - Zirconate

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ER -

Spreading and reaction behavior of CMAS-type silicate melts with multiphase Y and Gd aluminate-zirconate T/EBC materials

Abstract

Bibliographical note

Keywords

MRSEC Support

Publisher link

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University of Minnesota Materials Research Science and Engineering Center (DMR-2011401)

REU Site: Science and Engineering in Nanomaterials

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Spreading and reaction behavior of CMAS-type silicate melts with multiphase Y and Gd aluminate-zirconate T/EBC materials

Abstract

Bibliographical note

Keywords

MRSEC Support

Publisher link

Find It

Other files and links

Fingerprint

Projects

University of Minnesota Materials Research Science and Engineering Center (DMR-2011401)

REU Site: Science and Engineering in Nanomaterials

Cite this