Projects per year
Materials with multiple length-scale structures are a fascinating yet critical class of material that have characteristic dimensions spanning from nano- to macro-scales. These materials have enormous potential for future use as they can display unique properties such as combinations of strength and toughness at ambient to elevated temperatures. Mechanistic understanding of the failure mechanisms in these materials at operating temperature is vital to assure the integrity of these components, from the safe operation of nuclear reactors to the extended protection of turbine blades in aero jet engines and land-based gas turbines.
My current research focuses on the microstructural characterisation and mechanical testing (strength, damage and fracture including single mode and mixed-mode fracture) on a range of energy materials at multiple length-scales (micro-, meso- and macro-scale), and under extreme conditions such as energetic ions, neutron/proton irradiation and at elevated temperatures above 1000C. The materials of interest include nuclear graphite, ceramic matrix composites, TRISO fuel, MAX-phase ceramics, environmental and thermal barrier coatings, nano-structured steels and GaN-diamond heterogenously integrated materials for high-power RF devices.
Academic visitor, University of Oxford
1 Jul 2018 → 30 Jun 2019
Research Affiliate, Lawrence Berkeley National Laboratory
1 Oct 2015 → 30 Sep 2019
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Investigating the microstructure and mechanical behaviour of simulant "lava-like" fuel containing materials from the Chernobyl reactor unit 4 meltdownParaskevoulakos, H., Forna Kreutzer, J., Hallam, K. R., Jones, C. P., Scott, T. B., Gausse, C., Bailey, D. J., Simpson, C. A., Liu, L., Reinhard, C., Corkhill, C. L. & Mostafavi, M., 1 Mar 2021, In: Materials and Design. 201, 109502.
Research output: Contribution to journal › Article (Academic Journal) › peer-review
Zampetakis, I., Dobah, Y., Liu, D., Woods, B., Bezazi, A., Perriman, A. & Scarpa, F., 24 Dec 2020, In: Bioinspiration and Biomimetics. 16, 2, 12 p., 026004.
Research output: Contribution to journal › Article (Academic Journal) › peer-reviewOpen AccessFile17 Downloads (Pure)
In situ measurement of elastic and total strains during ambient and high temperature deformation of a polygranular graphiteLiu, L., 2020, In: Carbon. 163, p. 308-323
Research output: Contribution to journal › Article (Academic Journal) › peer-reviewOpen AccessFile5 Citations (Scopus)116 Downloads (Pure)
D Liu (Referee)2013
Activity: Publication peer-review and editorial work types › Editorial activity
D Liu (Participant)18 Sep 2012 → 21 Sep 2012
Activity: Participating in or organising an event types › Participation in conference