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Ultra high resolution SRAS

Faculty of Engineering

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Prof M Clark No more applications being accepted Competition Funded PhD Project (European/UK Students Only)

About the Project

Applications are invited for a research studentship in the field of development of advanced non-destructive evaluation (NDE) techniques leading to the award of an Engineering Doctorate (EngD) degree.

Advanced engineering alloys are used in many high value, high performance industries. The design of alloys with specific properties and processing routes to obtain the ‘right’ microstructure for the part is incredibly important for increasing the capabilities of materials to meet the emerging needs of industry. One method for mapping the microstructure is spatially resolved acoustic spectroscopy (SRAS); this technique maps the variations in surface acoustic wave velocity to obtain the crystallographic orientation. The resolution of SRAS microscopy is currently limited by two factors to around 1/25th of optical resolution (practically) and 1/10th of the optical resolution (theoretically).

In this project we will explore two techniques that can address these factors with the aim of developing an alternative strategy and instrumentation design that will allow SRAS to access the full optical resolution (<1um). The first is to switch the instrumentation away from the current pump-CW detection systems we use to pump-probe. This will raise the instrumentation defined limit of the maximum frequency we can use from around 300MHz to (effectively unlimited) 100GHz. The second is to attempt to perform the measurement using high frequency axial propagating bulk waves rather than the surface waves we currently use - this can only be performed at very high frequencies in the 20-100GHz range.

The student will be based at the Optics and Photonics Group at the University of Nottingham and during the course of studies will have two 3-month placements with IHI in Japan.

Funding Notes

The post is supported by a bursary and fees (UK/EU student rate) provided by EPSRC, together with a generous top up by the sponsor company in excess of £20,000pa, tax free. The student will also be allocated an annual budget for consumables and travel expenses.

You will have at least an upper 2nd class honours degree in Electronic / Mechanical engineering, physics or a related subject.

Contact details for informal enquiries:
[Email Address Removed]
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