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Details of Grant 

EPSRC Reference: GR/L35737/01
Title: COHERENCY STRAIN AND MICROSTRUCTURE FOR STRONG MATERIALS
Principal Investigator: Kidd, Dr P
Other Investigators:
Dunstan, Professor D Kelly, Professor A
Researcher Co-Investigators:
Project Partners:
Department: Physics
Organisation: Queen Mary University of London
Scheme: Standard Research (Pre-FEC)
Starts: 04 August 1997 Ends: 03 August 2000 Value (£): 112,673
EPSRC Research Topic Classifications:
Materials Characterisation
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Summary on Grant Application Form
We will first construct a high temperature miniature tensometer for direct tensile testing of epitaxial layers at temperatures up to 100c. Then a series of semiconductor strain-balanced superlattices (InGaAs on InP substrates) will be grown by the Sheffield Central Facility. Tensile strength will be measured as a function of layer thickness and layer strains. We expect to find dramatically improved tensile strength together with the possibility of designing the structure for a specific elastic limit.In parallel, the growth of superlattices based on aluminium and alloys available in a III-Growth reactor will be developed by Dr Missous at UMIST. These alloys may include AlBe, AlSi, AlGa or AlIn. When the quality is comparable with that of the semiconductor layers, a similar mechanical testing programme will start. We expect to be able to demonstrate enhanced strength at temperatures above the normal limit for aluminium alloys.
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