Professor Sergio Lozano-Perez

George Kelley Senior Research Fellow in Materials

Professor Sergio Lozano-Perez works in the Department of Materials where he holds the George Kelley Fellowship. He is a Senior Research Fellow at St Edmund Hall, and currently also one of the College’s Senior Harassment Officers.

In 1998 Sergio obtained a BsC+MsC in Theoretical Physics from the University of Sevilla (Spain). After a short period working for Siemens in Germany, he moved to Oxford where he obtained his DPhil in 2002. In 2004 he obtained a Postgraduate Diploma in Learning and Teaching in Higher Education (PGDipLaTHE) from the University of Oxford, becoming a fellow of the Higher Education Academy. He is also a member of the Institute of Physics, Royal Microscopical Society, Materials Research Society (USA) and American Nuclear Society (USA).

Sergio leads the NanoAnalysis group in the Department Of Materials, where he supervises over ten DPhil students and two post-docs, and teaches various undergraduate and postgraduate courses ranging from Corrosion to High-resolution analytical electron microscopy. His recent research has put Oxford at the forefront of high resolution microanalysis and characterisation of nuclear reactor materials. Over the years, he has contributed to the understanding of environmental or irradiation-assisted degradation in various components of fission nuclear reactors including the reactor pressure vessel, the heat exchanger, cooling systems or fuel claddings. As a result, he has developed strong links with the nuclear industry, currently collaborating with Kepco (INSS, Japan), Areva (France), EDF (France), Rolls Royce (UK), Westinghouse (UK) and EPRI (USA). His work is also internationally recognised for applying a multi-technique characterisation approach, including (S)TEM, atom-probe tomography and NanoSIMS, to the characterisation of nanoscale features.

Some components of nuclear reactors, such as steam generators, can weigh over 300 tonnes (4m diameter and 20m tall) and are expected to be safely in service for over 20 years. However, it is not unusual that they suffer from environmental degradation and develop cracks that can ultimately force their replacement (which is very costly to the nuclear industry). In this talk, Professor Sergio Lozano-Perez shows how we currently need to characterise materials at atomic level in order to understand their macroscopic behaviour. So, in another words, to explain how a crack propagates in a 300 tonne structure, we need to look at the atoms right ahead of the crack tip.

This is one of a series of Teddy Talks recorded at St Edmund Hall’s Research Expo in 2015. Teddy Talks are short presentations (usually around 12 minutes long) by St Edmund Hall academics and postgraduate students about an aspect of their research, aimed at a non-specialist audience.

Launch Video

Sergio Lozano-Perez - Teddy Talk on the structural integrity of mega structures

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