Details of Grant 

EPSRC Reference:	GR/R09367/01
Title:	Experimental-Theoretical Study of Alloying Behavior of High Temperature Metal Silicides
Principal Investigator:	Tsakiropoulos, Professor P
Other Investigators:	Shao, Professor G Watts, Professor J
Researcher Co-Investigators:
Project Partners:
Department:	Engineering and Physical Sciences
Organisation:	University of Surrey
Scheme:	Standard Research (Pre-FEC)
Starts:	01 October 2001	Ends:	30 November 2004	Value (£):	182,262
EPSRC Research Topic Classifications:	Materials Characterisation
EPSRC Industrial Sector Classifications:	Aerospace, Defence and Marine Energy
Related Grants:	GR/R08018/01
Panel History:
Summary on Grant Application Form
High temperature materials are key to developing the next generation aerospace propulsion and power systems successfully. Intermetallic compounds are candidates because of their strength, high elastic moduli and creep. Currently alloys are designed either empirically or using experimental and calculated phase equilibrium data. The CALPHAD method is fundamentally phenomenological in nature and cannot produce data on lattice stabilities for metastable phases. This data, which is the product of ab inition calculations, has to be incorporated in CALPHAD. The latter can say very little about the nature of alloying behaviour, which can be studied either experimentally using electron spectroscopy or via ab initio calculations. Experiments measure the Auger parameter of elements and its variation over a wide composition range, thus providing a means of testing some of the predictions of ab initio calculations. This research links experiments and ab initio calculations to understand the inter-relationships between electronic structure - bonding - crystal structure - microstructure - properties in silicides. Electron spectroscopy, electronic structure calculations, thermodynamic calculations and microstructural characterisation will be used as tools to probe the electronic and structural changes that take place as a result of substituting Si and transition metal in transition metal silicides and to relate such changes to the oxidation behaviour and toughness of (Mo1-zCrz)(Si1-xAlx)2. The research address Technology Foresight priorities that are relevant to the development of materials, which have the potential to meet foreseeable market needs and enable wealth creation in the UK, underpins the exploitation of materials to the benefit of UK industry and will foster core competencies of the Metallurgical, materials Science and Metal physics communities of the UK.
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Organisation Website:	http://www.surrey.ac.uk