第192回構材ゼミ Dr. David L. Poerschke 【開催報告】2026.04.20
2026年4月17日、Dr. David L. Poerschke（University of Minnesota） によるご講演が第192回構材ゼミとして開催されました。
Dr. David L. Poerschke (Back row, 5th from the right)
- 日時
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2026年4月17日（金曜日）13:30-14:30
- 場所
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NIMS千現地区 先進構造材料研究棟5階カンファレンスルーム
- 講演題目
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Materials Design to Protect High Temperature Alloys and Composites
- 講演者
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Prof. David L. Poerschke
Department of Chemical Engineering and Materials Science University of Minnesota, Minneapolis, MN
Abstract:
Thermal and environmental barrier coatings (T/EBCs) are used to protect metal and ceramic composite structural components used in the hot section of turbine engines. Recent advances in the design of alloys and composites with higher temperature capability necessitate new T/EBC materials and architectures to meet inter-related (and often competing) performance criteria. We will first discuss the application of thermo-mechanical analysis to screen candidate architecture and property space to identify viable architectures and priorities for new material development. We will then discuss progress in identifying new composite coating materials that could fill property gaps. Experimental screening shows that some phase assemblages sinter quickly while others yield remarkable high-temperature microstructure stability, and that this behavior can be tuned by controlling the average rare earth cation size in systems based on mixed rare earth oxides. At the same time chemical compatibility between layers is important and must be managed. We will discussing considerations for the durability of coatings based on these materials in complex service environments, and the application of these insights to guide next-generation T/EBC design.