Support for the UKCP consortium
Lead Research Organisation:
University of Edinburgh
Department Name: Sch of Physics and Astronomy
Abstract
Abstracts are not currently available in GtR for all funded research. This is normally because the abstract was not required at the time of proposal submission, but may be because it included sensitive information such as personal details.
Publications
Husband R
(2013)
Phase transitions in europium at high pressures
in High Pressure Research
Description | Under high pressure, hydrogen adopts very complicated crystal structures. The electronic behaviour goes from being molecular to more atomic, with new crystal phases being observed. We predict that at very high pressures hydrogen will be a metal, even at low temperatures. More practically, we were able to apply the same techniques to look at steels subject to irradiation damage, and introduce new design criteria to make steel more resistant to radiation, which in turn allows power stations with far longer lifetimes to be built. We also carried out calculations to help desing a machinable titanium alloy. This grant allowed us to understand why this happens by providing computer time for the necessary quantum mechanical calculations. |
Exploitation Route | Development of new alloys for nuclear and aerospace usage, in particular titanium alloy and steel. Analysis of Raman spectra of metals, and extraction of Raman data from molecular dynamics. |
Sectors | Aerospace Defence and Marine Energy Transport |
URL | http://www.ph.ed.ac.uk/~gja |
Description | Design of nuclear steels: Molecular dynamics and object kinetic Monte Carlo study of radiation-induced motion of voids and He bubbles in bcc iron and First-principles study of helium, carbon, and nitrogen in austenite, dilute austenitic iron alloys, and nickel gives an improved understanding of how the helium produce in reactor cores causes embrittlement in nuclear steels, particularly in the first wall. The results of the studies on hydrogen have provided new insights into how to interpret the Raman Spectra of high pressure materials, in particular signal from quantum excitations that are neither localised on a single molecule nor delocalised across the whole system. Metallic hydrogen has been proposed as a material for rocket fuel and for high temperature superconduction in the power distribution network. Our work shows such ideas are ridiculous. |
First Year Of Impact | 2015 |
Sector | Energy |
Impact Types | Societal |
Title | Amino acids as highly efficient modulators for single crystals of Zirconium and Hafnium metal-organic frameworks. |
Description | The data comprise experimental synthesis and characterisation of a number of Zr and Hf metal-organic frameworks, specifically using different amino acids as crystallisation promoters. Properties such as stability and porosity are reported. This record also contains links to additional data held in the Cambridge Crystallographic Data Centre. |
Type Of Material | Database/Collection of data |
Year Produced | 2016 |
Provided To Others? | Yes |
Description | HPstar |
Organisation | Beijing High Pressure Science Research Center |
Country | China |
Sector | Public |
PI Contribution | Theory work done with collaborators at HPstar Shanghai. High pressure Raman and X-ray studies |
Collaborator Contribution | Experimental work done by collaborators at HPstar Shanghai. High pressure Raman and X-ray studies |
Impact | Papers on high pressure materials, as designated in researchfish submission with HPstar co-authors |
Start Year | 2013 |
Description | State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiantong University, Xi'an, Shanxi 710049, China |
Organisation | Xi'an Jiaotong University |
Country | China |
Sector | Academic/University |
PI Contribution | Research visits, interatomic potential development, computing time |
Collaborator Contribution | Research visits, interatomic potential development |
Impact | Papers co authors with Hu Zong. See researchfish. |
Start Year | 2018 |
Title | MOLDY |
Description | MOLDY is a parallelised OpenMP short-ranged molecular dynamics program, first written at Harwell Laboratory in the 1980s. The program is rewritten in a modular fashion to allow for easy user modification, in particular the implementation of new interatomic potentials. Using Link Cells and Neighbour Lists, the code fully exploits the short range of the potentials, and the slow diffusion expected for solid systems. The code allows for a wide variety of boundary conditions, including constant pressure, temperature and strain rate. It also incorporates molecular statics via the conjugate gradients minimisation of the enthalpy. The code will enable simulation of millions of atoms using short range potentials. Currently modules for Embedded Atom, Finnis-Sinclair, Lennard Jones and Morse potentials exist. In addition, the "magnetic" potential formalism of Ackland and Wallenius is available for separate compilation. Alloys containing a number of elements can be simulated, subject only to the available potentials. |
Type Of Technology | Software |
Year Produced | 2009 |
Open Source License? | Yes |
Impact | Molecular dynamics calculations by multiple groups worlwide |
URL | http://code.google.com/p/moldy/ |