Posts Tagged ‘cvd

29
May
13

brand new all metal composite material

wwIt’s not often you can say that you are part of a team that has developed a brand new material, but so far as I am aware we have done just that, in partnership with the Max Planck Institute for Plasma Physics (IPP) at Garching near Munich. The new material in question is a tungsten fibre reinforced tungsten metal. What is so wonderful about that? Well if you carefully tailor the interface between the fibres and the matrix, you can turn an brittle material into a material with considerable toughness. This is particularly useful in high temperature environments where high thermal stresses cause solid tungsten to crack up. An example being a fusion power plant such as ITER currently under construction on Caderache in France.

The tungsten fibre is the same as that you find in old fashioned filament light bulbs and the matrix material is deposited using ATL’s specialism chemical vapour infiltration or CVI for short.

You can read more about it here: http://phys.org/news/2013-05-brittle-material-toughened-tungsten-fibre-reinforced-tungsten.html

07
Mar
13

A bit more rocket science

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So the 6-month Pathfinder Project has wound up. The work done, the reports written, the grant money paid: Thank you very much Astrium/UKSA!

And the results?

Well, like most research, as many new questions asked as old ones answered. Here is the summary of the public report:

The project made significant steps in coating iridium onto C103 niobium alloy to provide a high temperature thruster material.

Initial coating trials with a refractory metal interlayer were successful, but coatings of iridium onto the substrate were problematic. However, the experiments and analysis showed that a duplex layer of refractory metal and iridium could be deposited on a modified substrate. Due to the scientific potential of the material combination and its commercial interest, work will continue on the coatings under the ESA HTAE project until May 2013.

Summary of the summary: There are a few problems, but some results are promising and as the prize is big, we continue to work towards it.

If you want to know more, please get in contact.

18
Aug
11

Some Rocket Science

We have just started a new project. It’s for the European Space Agency and we are part of a group designing a new engine for missions to Mars and exciting stuff like that. Interesting stuff.

Our particular brief is to look at high-temperature materials an amazing number of which are made by CVD or CVI: For instance, W, Re, Ir, Nb, Ta, SiC, HfC & TaC




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