Microstructural and interfacial characterization for protective thin films in extreme environments
The development and optimization of coatings towards their application are of major importance especially when the components they protect are exposed to aggressive media. Extreme environments impose strong constraints on the design of the film and its interface with the substrate. Moreover, various degradation mechanisms such as the ones we study (corrosion, high-temperature oxidation, abrasive wear and irradiation mainly) can have very different and local effects. As a result, refined coating solutions are under development and need to be characterized. Indeed, fine, accurate and multi-scale characterizations prior to and after ageing tests constitute the major comprehension and analysis tool. The coatings concerned are nanostructured films, high-entropy alloys, MAX-phase, metallic oxides and nanometric multilayers. Because they all include nanometer-scale characteristics (particles, layers or simply interface), they require high-resolution analyzes which is possible with Transmission Electron Microscopy (TEM). This internship will be dedicated to the TEM analysis of coated samples before and after their degradation in extreme environments.
School of Materials Science & Engineering
50 Nanyang Avenue, Singapore 639798
NTU: Dong ZHILI, ZLDong@ntu.edu.sg