Oxidation and Hot Corrosion of Superalloys скачать в хорошем качестве

Oxidation and Hot Corrosion of Superalloys

Talk by Dr. Stella Padrazzini*, Imperial College Atom probe tomography (APT) is a high-resolution characterisation technique, which provides unparalleled spatial and chemical resolution on the nanoscale. It is a form of 3D quasi-atomic scale mass spectroscopy, which gives invaluable insight in the mechanisms of oxidation and corrosion of metals. Information on oxide scale formation and growth can be gained, including atomic segregation at grain boundaries and dislocations, which can then be used to inform oxide scale growth models and mechanisms. This type of analysis can be performed on corroded crack tips as well, allowing in-depth understanding of the failure mechanisms. This kind of information would normally require correlative microscopy using multiple high-resolution techniques, though it can be obtained through atom probe tomography. *Stella Pedrazzini is a Lecturer in Engineering Alloys, EPSRC Early Career Fellow and RAEng Associate Research Fellow at Imperial College London. She works on the environmental degradation of engineering alloys, with a particular interest in oxidation and hot corrosion of nickel and cobalt-based superalloys, aqueous corrosion of steel as well as advanced characterisation techniques such as transmission electron microscopy (TEM) and atom probe tomography (APT). She got her DPhil in Materials Science from the University of Oxford in 2015, then spent 3 years as a post doc in the Oxford atom probe group. She then worked as a post-doc in the Rolls-Royce UTC at the University of Cambridge, before coming to Imperial College as a Lecturer in October 2018. In 2019 she was awarded both an EPSRC Early Career Fellowship and an RAEng Associate Research Fellowship.