Ceramic research reaches new heights

Materials scientists at the University of Wales Aberystwyth (UWA) are taking ceramics to new heights in order to determine the structure and stability of the materials which are used to construct aeroplane engines and the tiles for the space shuttle.

Dr Rudi Winter and colleagues from the Department of Physics at UWA are using a unique combination of techniques to study the materials at extreme temperatures which simulate those experienced when aircraft travel at high speed or when they decelerate rapidly.

“Ceramics have been used as heat shields in spacecraft re-entering into the atmosphere, and in aircraft engines because the burning temperatures are too high for most metals.” says Dr Winter. “At present, ceramic linings are not used for normal civil aircraft, although metal-ceramic composites may be used one day for that purpose if the favourable mechanical properties of metals can be married with the good thermal behaviour of ceramics. That is why it is important to understand the structural response of these materials to mechanical and thermal impact, so that we learn to square the circle.”.

Dr Winter and CASE Student Malcolm Coleman are therefore applying Nuclear Magnetic Resonance (NMR) together with a new non-contact thermometry technique for the very first time in order to study the stability and structure of these ceramics under real conditions, i.e. at very high temperatures up to 2200oC.

The aim of the project is to implement a novel technique for contactless temperature measurement (laser-absorption radiation thermometry – LART), on the ultra-high temperature aerodynamic levitation-based NMR probe – the only one of its kind in the UK – to determine the atomic structure of these ceramics.

“NMR allows us to determine the structure of a material (at an atomic level) around probe atoms in a material in a similar manner to which its close relative, MRI – magnetic resonance imaging – exploits the same physics to probe human “samples” in medicine.” continues Dr Winter.

“The probe is able to heat the samples without needing a container to temperatures up to 2200oC by means of a 125W infrared laser. In order to determine the structural changes, the temperature will be measured and controlled with previously unreached precision using the LART technique which has been developed by our colleagues at the National Physical Laboratory (NPL)”.

For Dr Andrew Levick in the Thermal Metrology Group at NPL, this work is a showcase for their new laser-absorption radiation thermometry (LART) technique which overcomes many of the problems inherent in conventional pyrometry techniques. They hope that Dr Winter will be able to demonstrate its feasibility in practical applications in order for them to be able to market it to the industry in the near future.

The three-year project has been made possible by a grant of £40,000 from the Engineering and Physical Sciences Research Council (EPSRC) and support from National Physical Laboratory.

Media Contact

Arthur Dafis alphagalileo

All latest news from the category: Materials Sciences

Materials management deals with the research, development, manufacturing and processing of raw and industrial materials. Key aspects here are biological and medical issues, which play an increasingly important role in this field.

innovations-report offers in-depth articles related to the development and application of materials and the structure and properties of new materials.

Back to home

Comments (0)

Write a comment

Newest articles

Innovative 3D printed scaffolds offer new hope for bone healing

Researchers at the Institute for Bioengineering of Catalonia have developed novel 3D printed PLA-CaP scaffolds that promote blood vessel formation, ensuring better healing and regeneration of bone tissue. Bone is…

The surprising role of gut infection in Alzheimer’s disease

ASU- and Banner Alzheimer’s Institute-led study implicates link between a common virus and the disease, which travels from the gut to the brain and may be a target for antiviral…

Molecular gardening: New enzymes discovered for protein modification pruning

How deubiquitinases USP53 and USP54 cleave long polyubiquitin chains and how the former is linked to liver disease in children. Deubiquitinases (DUBs) are enzymes used by cells to trim protein…