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Published on: October 6, 2023
Combinatorial approach to turbine bond coat discovery
Christopher Jason Metting1, Jonathan Kenneth Bunn, Ellen Underwood
1SmartState Center for Strategic Approaches to the Generation of Electricity, Department of Chemical Engineering, University of South Carolina , Columbia, South Carolina 29208, United States.
ACS Combinatorial Science
|May 24, 2013
Summary
A new, rapid, nondestructive method screens novel bond coat materials. This high-throughput technique identifies optimal compositions for protective aluminum oxide scales, accelerating materials discovery.
Area of Science:
- Materials Science
- Surface Engineering
- High-Throughput Screening
Background:
- Developing advanced bond coat materials is crucial for thermal barrier coatings.
- Identifying materials that form protective alpha-alumina (α-Al2O3) scales is key for coating longevity.
- Current screening methods for bond coat materials can be time-consuming and resource-intensive.
Purpose of the Study:
- To develop a nondestructive, high-throughput method for screening novel bond coat materials.
- To rapidly determine the phase formation and protective capabilities of thermally grown oxides on bond coat compositions.
- To validate the developed methodology using the well-established Nickel-Aluminum (Ni-Al) system.
Main Methods:
- Utilized a suite of characterization techniques including Raman spectroscopy, fluorescence spectroscopy, and X-ray diffraction.
- Applied these techniques to a continuous composition spread sample for rapid analysis.
- Focused on identifying the nucleation of the preferred thermally grown oxide, α-Al2O3.
Main Results:
- Successfully developed a nondestructive method for high-throughput screening of bond coat materials.
- Demonstrated rapid determination of thermally grown oxide phases and their protective capabilities.
- Validated the methodology with the Ni-Al system, confirming its effectiveness.
- Identified specific bond coat composition regions favoring α-Al2O3 nucleation.
Conclusions:
- The developed methodology significantly accelerates the identification of effective bond coat materials.
- This approach substantially reduces the experimental phase space requiring further investigation.
- Enables faster discovery of advanced materials for high-temperature applications.
