【開催報告】2026.08.24 -第197回構材ゼミ- Dr. Sanjay Sampath (Department of Materials Science and Engineering Stony Brook University, New York, USA)
講演後の集合写真
Dr. Sanjay Sampath (後列右から5番目)
- 日時
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2026年8月24日（月曜日）10:30-11:30
- 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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Thermal Spray as an Additive and Layered Manufacturing Technology
- 講演者
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Prof. Sanjay Sampath (Distinguished Professor)
Department of Materials Science and Engineering Stony Brook University, New York, USA
Abstract:(prepared by KAKISAWA)
As an innovative multilayer design for thermal barrier coatings (TBCs) used in gas turbine components, such as blades and vanes exposed to severe thermal cycling, Dense Vertically Cracked (DVC) coatings are proposed. Vertical segmentation cracks are intentionally introduced into dense thermally sprayed ceramic layers to enhance in-plane strain tolerance and relieve thermal stresses. Rather than treating cracks as defects, this approach utilizes controlled crack architecture as a functional microstructural feature. By combining dense, porous, graded, and vertically cracked layers, multiple functions—including thermal insulation, erosion resistance, and strain accommodation—can be integrated into a single TBC system, demonstrating Sampath’s concept of microstructure and defect architecture by design.
Another topic is the expansion of the conventional view of thermal spray from a coating process to a versatile layered manufacturing process. Thermal spray is not limited to depositing protective coatings on existing components; instead, it is regarded as a manufacturing platform capable of building materials, structures, and functions through controlled layer-by-layer deposition. A key advantage of this approach is the ability to control not only geometry, but also material composition, microstructure, and functionality during deposition. By increasing the deposited thickness, thermal spray can be extended from thin coatings to thick deposits, near-net-shape structures, and even free-standing components.