Feasibility assessment of self-grading metallic bond coat alloys for EBCs/TBCs to protect Si-Based ceramics

M. P. Brady; B. L. Armstrong; H. T. Lin; M. J. Lance; K. L. More; L. R. Walker; F. Huang; M. L. Weaver

doi:10.1016/j.scriptamat.2004.10.024

Feasibility assessment of self-grading metallic bond coat alloys for EBCs/TBCs to protect Si-Based ceramics

M. P. Brady, B. L. Armstrong, H. T. Lin, M. J. Lance, K. L. More, L. R. Walker, F. Huang, M. L. Weaver

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

7 Scopus citations

Abstract

A sputtered γ (TiAl) + Laves TiAlCr coating formed an adherent Al₂O₃ scale on SN 282 Si₃N₄ when oxidized. A Ti-N rich layer was formed at the TiAlCr-Si₃N ₄ interface, which effectively resulted in beneficial local Al enrichment underneath the growing Al₂O₃ scale, rather than detrimental Al loss to the substrate.

Original language	English
Pages (from-to)	393-397
Number of pages	5
Journal	Scripta Materialia
Volume	52
Issue number	5
DOIs	https://doi.org/10.1016/j.scriptamat.2004.10.024
State	Published - Mar 2005

Funding

The authors thank J.A. Haynes, K.N. Lee, E.J. Opilia, B.A. Pint, and J.L. Smialek for many fruitful discussions in the area of EBCs/TBCs, and T.M. Besmann, R.A. Lowden, and P.F. Tortorelli for reviewing this manuscript. This work was funded by the Assistant Secretary for Energy Efficiency and Renewable Energy For Distributed Energy Programs, United States Department of Energy. Oak Ridge National Laboratory is managed by UT-Battelle, LLC for the US DOE under contract DE-AC05-00OR22725.

Funders	Funder number
United States Department of Energy
U.S. Department of Energy	DE-AC05-00OR22725
Office of Energy Efficiency and Renewable Energy
Oak Ridge National Laboratory

Keywords

Coating
Environmental barrier coatings (EBC)
Oxidation
Silicon nitride
Surface alloying
Thermal barrier coatings (TBC)

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10.1016/j.scriptamat.2004.10.024

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title = "Feasibility assessment of self-grading metallic bond coat alloys for EBCs/TBCs to protect Si-Based ceramics",

abstract = "A sputtered γ (TiAl) + Laves TiAlCr coating formed an adherent Al2O3 scale on SN 282 Si3N4 when oxidized. A Ti-N rich layer was formed at the TiAlCr-Si3N 4 interface, which effectively resulted in beneficial local Al enrichment underneath the growing Al2O3 scale, rather than detrimental Al loss to the substrate.",

keywords = "Coating, Environmental barrier coatings (EBC), Oxidation, Silicon nitride, Surface alloying, Thermal barrier coatings (TBC)",

author = "Brady, {M. P.} and Armstrong, {B. L.} and Lin, {H. T.} and Lance, {M. J.} and More, {K. L.} and Walker, {L. R.} and F. Huang and Weaver, {M. L.}",

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AU - Brady, M. P.

AU - Armstrong, B. L.

AU - Lin, H. T.

AU - Lance, M. J.

AU - More, K. L.

AU - Walker, L. R.

AU - Huang, F.

AU - Weaver, M. L.

PY - 2005/3

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N2 - A sputtered γ (TiAl) + Laves TiAlCr coating formed an adherent Al2O3 scale on SN 282 Si3N4 when oxidized. A Ti-N rich layer was formed at the TiAlCr-Si3N 4 interface, which effectively resulted in beneficial local Al enrichment underneath the growing Al2O3 scale, rather than detrimental Al loss to the substrate.

AB - A sputtered γ (TiAl) + Laves TiAlCr coating formed an adherent Al2O3 scale on SN 282 Si3N4 when oxidized. A Ti-N rich layer was formed at the TiAlCr-Si3N 4 interface, which effectively resulted in beneficial local Al enrichment underneath the growing Al2O3 scale, rather than detrimental Al loss to the substrate.

KW - Coating

KW - Environmental barrier coatings (EBC)

KW - Oxidation

KW - Silicon nitride

KW - Surface alloying

KW - Thermal barrier coatings (TBC)

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DO - 10.1016/j.scriptamat.2004.10.024

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JO - Scripta Materialia

JF - Scripta Materialia

IS - 5

ER -

Feasibility assessment of self-grading metallic bond coat alloys for EBCs/TBCs to protect Si-Based ceramics

Abstract

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Keywords

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