High Temperature Oxidation Group

Research Interests

Nickel Alloys

Nickel-base alloys are an area of considerable research within our group.  Currently projects investigate the oxidation behaviour of high strength disc alloys used in area- and land-based gas turbines.  This includes studying existing alloys but also evaluating development alloys.  Much of our work has been published in the open literature and a comprehensive list is given under Publications.

High Cr Steels

Steels are an industrially important group of alloys.  High Cr steels are alloys of choice for a number of critical components in Advanced Gas Reactors (nuclear) including as cladding to house the fuel pellets.  In some reactors significant carbon deposits form on the cladding hindering heat transfer.  Understanding the mechanism leading to the formation of the filamentary carbon deposits has been a significant research programme within the High Temperature Oxidation Group due to the expertise of the late Prof Hugh Evans.  Hugh described the oxidation processes leading to the formation of the catalyst and proposed methods to successfully inhibit the formation or efficacy of the particle.  This research area was supported by EDF.  This work was presented at many conferences and won the poster prize at the 2019 GRC.

Carbon filament with encapsulated Ni catalyst.

High resolution TEM micrograph of a carbon filament. The dark particles at the tip are shown to have lattice parameters consistent with metallic Ni viewed along a fcc (110) axis.


Cross-section through a cooling fin on a high Cr steel heat exchanger showing the formation of an external oxide scale and internal degradation of the alloy.  The composnent is close to end of life.Prediction of depletion of oxidising element from the outer corner of a cooling fin.

Model devised in our group to predict the depletion of the external oxide forming element, in this case Cr, and thus estimate the life time of the cooling fin on the heat exhanger shown above.  Below the same prediction for the base of the cooling fin. Prediction of depletion of oxidising element from the base of a cooling fin.