Real-time 3D imaging of nuclear structural materials
at high temperature – Dong Liu – 7:30pm, University of Bristol. Joint lecture with Nuclear Institute.

Materials with multiple length-scale structures are a fascinating yet critical class of materials that have characteristic dimensions spanning from nano- to macro-scales. These materials have enormous potential for nuclear and energy applications as they can display unique properties such as combinations of strength and toughness at ambient to elevated temperatures.

Taking nuclear-grade graphite as an example, which is a porous graphite composite used as the moderator and major structural component in UK nuclear power reactors, I will talk about how to obtain its 3D microstructure information and extract its mechanical properties, in real time, at elevated temperatures (e.g., at 1000°C) using a technique called synchrotron X-ray computed micro-tomography (XCT). It was found that at reactor operating temperatures, this material has an unusually higher strength and resistance to crack growth than at ambient temperatures. The mechanisms that are responsible for this behaviour relate to the relaxation of residual stresses. In addition, I will show you other examples of structural materials, such as ceramic-based composites, and how one can capture the in situ damage and fracture development in these materials at temperatures relevant to their service conditions (e.g., at 1200°C and even higher).

Please use the back entrance of the Physics building as the front entrance will be locked after 5.00pm.
The Mott Theatre is on the ground floor, as you enter from the back of the building just turn left and follow the signs to 'Mott Lecture Theatre', it is right there at the left corner of the building.