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- PhD Studentship: Saving the Mary Rose: Determining the structural and material properties of a Tudor shipwreck
Department/Faculty: Department of Materials, Faculty of Engineering,
Duration: 42 months to start as soon as possible
Supervisors: Dr Finn Giuliani
Applications are invited for a three and half year PhD studentship which has become available for the project ‘Saving the Mary Rose: Determining the structural and material properties of a Tudor shipwreck’ as part of the joint Centre for Doctoral Training in Advanced Characterisation of Materials at Imperial College London starting as soon as possible.
The Mary Rose was a warship built on the orders of the famous King, Henry VIII, when he came to the throne in 1509. After 34 years of active service, the ships life came to a dramatic end during battle in 1545, where it sank off the south coast of England. The ship was salvaged in 1982; its preservation is largely attributable to the layers of sediment which provided protection from typical degradation processes. Despite the remarkable condition of the ancient wood, some degradation had occurred which threatened its stability upon excavation (https://maryrose.org/about-the-mary-rose/). Therefore, a conservation treatment was devised to ensure that the ship would be stable, which involved consolidation and careful drying. To ensure the authentic nature of the ship, a minimal intervention method has always been adopted which means that some dimensional changes in the timbers was expected. This will affect not only individual elements, but the overall structure as the original connectivity of the ship timbers may be compromised. To aid the development of conservation methods, photogrammetry and laser scans have been completed at key intervals, namely during consolidation and drying. This information is now a unique reference as to the dimensional and structural changes that have occurred throughout the years, and in response to different parts of the conservation process.
This project will focus on understanding the material and structural properties that this shipwreck exhibits post active conservation, with the aim to use this information to explore potential long-term support structures. The material itself is not well understood, and is often incorrectly assumed to behave as wood, whereas it is now a complex mixture of archaeological wood which has undergone degradation, fortified with polyethylene glycol to compensate for this, and additions of other compounds which have migrated in during the burial period. Numerous timbers exist which can be used to determine material properties that would be representative of the shipwreck. Alongside this careful and detailed interrogation of these scans will allow a full picture of the current state of the structure to be determined, highlighting areas which will need further support long-term or additional conservation work to ensure their stability. This is the first time such a study has been possible, enabling the correlation of the conservation to the structure, and the structure to the material properties, giving an unprecedented insight into the conservation of such complex heritage. The outcomes would be beneficial not only for the Mary Rose, but any heritage project seeking to stabilise large wooden structures.
This PhD studentship is funded by the UK's Engineering and Physical Sciences Research Council as part of the joint Centre for Doctoral Training in Advanced Characterisation of Materials with University College London and is open to UK home students or European students who have spent the last three years in the UK. The studentship will cover tuition fees plus the standard maintenance stipend of £16,777 (this year’s rate) per annum.
You will hold, or be expected to achieve, a Master's degree in addition to a Bachelor's degree (or equivalent) at 2:1 level (or above) in a relevant subject (e.g. Materials, Physics, Chemistry, Earth Sciences, Mechanical, Civil, or Chemical Engineering). Students will take taught courses at both universities during a three month period.
To make informal enquires please contact the CDT team on email@example.com
- PhD Studentship: Adhesion strength of environmental barrier coatings on SiC/SiC CMCs for aerospace.
Department/Faculty: Department of Materials, Faculty of Engineering
Campus: South Kensington
Duration: 42 months, starting as soon as possible
Supervisor: Dr. Nasrin Al Nasiri
|Funding for:||UK Students, EU Students|
|Funding amount:||£16,777 per annum|
Closing date: 23rd January 2019
Starting date: ASAP but contact Dr. Nasrin Al Nasiri
This PhD project aims to study the adhesion strength of environmental barrier coatings (EBCs) applied on silicon carbide (SiC) ceramic matrix composites (CMCs) to develop the next generation of gas turbines that are faster, cheaper, lighter, more efficient and less pollutant.
A major breakthrough in gas turbine’s performance (cycle efficiency, reduce noise and emissions) requires a new generation of structural materials having an operative temperature higher than the alloys currently used. Ceramic matric composites (CMCs) exhibit superior high temperature strength and durability that will revolutionize the new generation of engines. In addition, the low density of CMCs allows weight savings of up to 30% compared to Ni-based alloys thus leading to simple and compact design. CMCs have reached the degree of maturity that allows them to be used for the next generation of gas turbines. Si-based ceramics have excellent oxidation resistance due to formation of a protective silica layer on reacting with dry air. However, the same silica layer will react with water vapour to form gaseous silicon hydroxide, leading to high recession and component failure. To avoid this behaviour, a prophylactic environmental barrier coating (EBC) is required. A variety of EBCs have been developed in the past consisting of a minimum of 4 layers requiring a costly application method such as plasma spraying. Dr. Al Nasiri’s group has developed a reliable single layer of EBC using a low cost applying method.
Understanding the adhesion strength at the interface of the coating-substrate and study the failure mechanisms under different loading conditions and environments is essential to predict accurately the service life of the coating and ensure they survive their design conditions.
- The objectives of this project are: To develop mechanical testing methodologies that will enable an accurate and reliable characterization of the adhesion strength at the coating/CMC interface using the single layer approach.
- To combine systematic mechanical testing and structural characterization in order to develop a deep understanding of the parameters that control adhesion, delamination, spallation and the models needed to support the design of new materials.
The qualified candidates will join a dynamic research team with a research focus on ceramics fabrication and performance in the Center for Advanced Structural Ceramics ath department of Materials at Imperial College London. Applicants should have knowledge in one or more of: ceramics microstructures, electron microscopy or mechanical testing. Good teamwork and communication skills are essential. In addition, the candidates should have (or be expecting to obtain) a first degree (1st class or upper second class) in materials, mechanical engineering or a relevant subject.
This 3.5-year studentship will provide full ‘home rate’ fees plus the standard maintenance stipend to UK and EU students who meet the residency criteria (currently a stipend of £16,553).
Applications will be processed as received. For questions or further details regarding the project, please contact Dr. Nasrin Al Nasiri (firstname.lastname@example.org).
For questions regarding the admissions process, please contact Materials student office (email@example.com).
Formal applications can be completed online: http://www3.imperial.ac.uk/materials/research/phdopportunities while information about the Department can be found at http://www3.imperial.ac.uk/materials.
PhD studentship in mechanical properties of nacre-like ceramics
Duration: 36 months
Supervisors: Dr Florian Bouville
Ceramics are stiff and potentially strong materials uniquely capable of resisting to extreme environments: heat, corrosion, radiation. This resistance put them as prime candidate for tomorrow’s critical device in transportation, aeronautic, and biomedical applications. The only thing holding them back is their intrinsic brittleness that make them very sensitive to defects and prone to catastrophic failure.
Natural materials have found ways around this problem by adapting their microstructure at multiple length scales. This architecturation provides failure mechanisms that increase their damage tolerance by orders of magnitude compare to the pure ceramic they are based upon.
Starting from seashell’s structure blueprint, nacre-like ceramics and composites have been recently developed and can now get properties on par with some of the state-of-the-art composites used in aeronautic applications. With efforts and insights on these materials, we could be able to push even further their performances.
The role of the PhD candidate will be to design new nacre-like ceramics to work at high temperature, to study in depth their micromechanical behavior, and to provide in the end potential materials candidates to replace ceramic used in today’s systems.
The candidate will learn during her/his stay colloids science, ceramic processing, sintering techniques, structural characterizations, and fracture mechanics along with strong skills in scientific methods, problem solving, and scientific results communications.
We are seeking applications from excellent, motivated and curious UK (or EU with UK residency proof) candidates with a minimum 2:1 (or equivalent) first degree in Materials Science, Chemistry or Applied Physics for a three-year PhD studentship. The project will be based in the Centre for Advanced Structural Ceramics (http://www3.imperial.ac.uk/structuralceramics) and the Department of Materials at Imperial College London. This three-year studentship will provide full ‘home rate’ fees plus the standard maintenance stipend to UK and EU students who meet the residency criteria (currently a stipend of £16,553).
Applications will be processed as received. For questions or further details regarding the project, please contact Dr Florian Bouville, firstname.lastname@example.org.
Closing Date: 9th December 2018
For questions regarding the admissions process, please contact Materials student office . Formal applications can be completed online but only after informal enquiries: http://www3.imperial.ac.uk/materials/research/phdopportunities while information about the Department can be found at http://www3.imperial.ac.uk/materials.
- We currently aren't looking for any Research Associates.