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EPSRC Reference: GR/M86743/01
Title: CHARACTERISATION OF OXIDE MULTI-LAYERS ON METAL SUBSTRATES USING A NOVEL COMBINATION OF TECHNIQUES
Principal Investigator: Xiao, Professor P
Other Investigators:
Shemilt, Dr J
Researcher Co-Investigators:
Project Partners:
Alstom Group Rolls-Royce Plc (UK)
Department: Materials Engineering
Organisation: Brunel University London
Scheme: Standard Research (Pre-FEC)
Starts: 01 January 2000 Ends: 31 July 2001 Value (£): 188,702
EPSRC Research Topic Classifications:
Materials Characterisation Surfaces & Interfaces
EPSRC Industrial Sector Classifications:
Aerospace, Defence and Marine Electronics
Energy Transport Systems and Vehicles
Related Grants:
Panel History:  
Summary on Grant Application Form
The measurement of the electrical properties of the oxide layers using AC impedance (ACI) spectroscopy will be combined with characterisation of the oxide layers using electron microscopy and a residual stress measurement facility. The main task here is to investigate how the electrical properties of oxide scales are affected by the level of impurities, grain size, thickness, uniformity, defects and residual stress in the oxide layer, as well as by the temperature and atmosphere under which ACI measurements are carried out. The main objectives of this research is, by using the ACI method, to characterise the microstructural changes of oxide scales and thermal barrier coatings (TBCs) after exposure to high temperature environments.The research programmes are as follows:1. Determining electrical properties of oxide scales.2. Microstructural characterisation and chemical analysis of oxide scales.3. Examining adherence of oxide scales on metal substrates.4. Measurement of growth strain in oxide scales.5. Developing models on electrical property-microstructure-growth strain relationships.6. Determining breakaway oxidation conditions.7. Characterisation of alumina growth in TBCs8. Characterisation of microstructural change of yttria stablised zircona in TBCs9. Developing a scanning ACI microprobe for detecting local defects in oxide layers.
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Organisation Website: http://www.brunel.ac.uk