Chris Grovenor has interests in the application of advanced analytical techniques to understanding the relationship between chemistry and microstructure and the properties of functional materials. Current areas of research include:
Oxidation and hydriding mechanisms of Zr nuclear fuel cladding alloys (with Rolls Royce, Westinghouse, EPRI, EDF, CNL, Manchester University and Imperial College)
Synthesis and characterisation of the new superconducting materials (with Prof. Susannah Speller). I am the Director of the £6.5M Centre for Applied Superconductivity funded by the Oxfordshire LEP and working with local companies and research organisations, and with the Clarendon Laboratory, on industrially relevant problems in applied superconductivity.
Leadership of the group using high resolution SIMS analysis to study a variety of industrially relevant problems, including hydrogen (deuterium) pickup mechanisms in zirconium alloys and the mechanisms of degradation of solid state Li-on batteries.
The application of thin film science for improving the performance of solid state batteries.
On the depth resolution of transmission Kikuchi diffraction (TKD) analysis.
In this paper, we have analyzed the depth resolution that can be achieved by on-axis transmission Kikuchi diffraction (TKD) using a Zr-Nb alloy. The results indicate that the signals contributing to detectable Kikuchi bands originate from a depth of approximately the mean free path of thermal diffuse scattering (λTDS) from the bottom surface of a thin foil sample. This existing surface sensitivity can thus lead to the observation of different grain structures when opposite sides of a nano-crystalline foil are facing the incident electron beam. These results also provide a guideline for the ideal sample thickness for TKD analysis of ≤ 6λTDS, or 21 times the elastic scattering mean free path (λMFP) for samples of high crystal symmetry. For samples of lower symmetry, a smaller thickness ≤ 3λTDS, or ≤ 10λMFP is suggested.
A multi-technique study of “barrier layer” nano-porosity in Zr oxides during corrosion and hydrogen pickup using (S)TEM, TKD, APT and NanoSIMS