News Archive (2012)

18/12/12: New Paper

Xiaoou Yi has just had her paper on in-situ studies of radiation damage in tungsten and tungsten-rhenium published in Philosophical Magazine. The full paper is online here

20/11/12: RaDIATE project

RaDIATE: Radiation Damage In Accelerator Target Environments
- we have just started work on a new project jointly between Oxford Materials, STFC and Fermilab, to study effects of radiation damage (high energy protons) in targets for high-power neutron & neutrino "factories" .
See www-radiate.fnal.gov for more details.

19/10/12: New Papers

The MFFP group have had two new papers on the mechanics of ion implanted materials published in The Journal of Nuclear Materials. The first shows the differences in hardening under ion irradiation between pure tungsten and tungsten 5wt% rhenium. Atom probe tomography and TEM were used to look at the chemical segregation and defect populations produced under implantation from 0.04dpa to 33dpa. The full paper is available here.
The second investigates the effect of ion damage on the changes in hardness of a range of binary iron-chromium alloys. In higher chromium alloys damage was seen to saturate by 2dpa whereas continued hardening was seen in the lower chromium. The full paper is available here.

19/09/12: PhD Open Day at Culham, 15 November 2012

We will be at this event - if you might be interested in doing a doctorate in fusion materials, come and talk to us!
http://www.culhamphd.org.uk/index.html

19/09/12: Oxide-dispersion Strengthened Alloys for Nuclear Application: 24-26 September 2012.

A three-day workshop on oxide-dispersion strengthened alloys for nuclear applications . This low-cost meeting will be centred on about a dozen keynote lectures (of ~ 1 hour) and will give ample time for discussions centred around the lectures and two substantial poster sessions where
"work in progress" will be reported. The final programme is now available. For more details see here.

17/08/12: First irradiated specimen

This week our first neutron-irradiated material arrived in Oxford: a 2.3mm diameter, 200µm thick piece of Fe-5%Cr, irradiated at the Advanced Test Reactor at Idaho National Lab, courtesy of our collaborator Bob Odette at UCSB. Chris Hardie earlier spent a week at CAES, Idaho Falls, cutting many micromechanical test elements into it (see News 26/3/12). Now to test them!

25/7/12: New Paper on ion implantation and micromechanical testing

Ele Grieveson has just had her Part II (4th year undergraduate) project work published in the Journal Of Nuclear Materials. After self-ion implantation in pure iron, both micro-pillar compression and nanoindentation were used to examine the changes in mechanical properties. The implanted pillars have a deformation mode which differs markedly from the unimplanted pillars but show no change in yield-stress. This suggests that the controlling mechanism for deformation is different between nanoindentation and micropillar
compression and that care is needed if using micropillar compression to extract bulk properties of irradiated materials. The full paper is here.

16/7/12: Nuclear Materials Short Course: 3-7 September 2012.

Course Cancelled.

20/4/12: Tungsten Ion Implantation

James Gibson and Dave Armstrong have just returned from the first sucessful tungsten ion and helium ion implantation we have performed at CEA Saclay using the Jannus facility

 

 

12/4/12: New Paper on Tungsten Foils

Xiaoou Yi and Dr David Armstrong have been collaborating with researchers from KIT, Germany, and Plansee, Austria, on characterising thin tungsten foils for use in W/W composites for structural applications in fusion reactor divertors. Their new paper which explains some of the interesting mechanical properties of such thin foils can be found here.

26/03/12: Chris Hardie at UCSB and CAES

Chris spent some days at UCSB, discussing work with Bob Odette and group, before driving (!) to Idaho Falls to start work our first neutron-irradiated materials. He is at CAES, Idaho Falls, this week, making FIB-machined micro-cantilevers in Fe-6%Cr alloys irradiated at INL, and supplied to us by Bob Odette. Image shows Chris' first (and smallest planned!) cantilevers.

14/02/12: Dave Armstrong and Steve Roberts at UCSB

Dave and Steve were at a three-day meeting at the University of California, Santa Barbara, on "Challenges in Tungsten for Fusion Applications". See here for pictures.

17/01/12: ITER news

Collaborative work on oxide-dispersion strengthened steels, involving Sergio Lozano-Perez (Oxford), Vanessa de Castro (UC3M, Spain) and Emmanuelle Marquis (University of Michigan, USA) is featured in "ITER News".

16/01/12: Group photo

After one of our Friday morning meetings, I got everyone (well, nearly everyone) together for a photo.
So we now also have a "Group Photos" page.

06/01/12: Bristol-Oxford Nuclear Research Centre in "Materials World"

An article on the launch event: www.iom3.org/news/fission-future?c=574. For more details about the Centre, see www.nrcuk.net/.