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Author Topic: What is the crystal structure of super bainite?  (Read 2598 times)

Offline thedoc

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What is the crystal structure of super bainite?
« on: 10/07/2012 15:34:19 »
What is the crystal structure of super bainite?
Asked by Peter Jemley, via Twitter


                                        Visit the webpage for the podcast in which this question is answered.

 

« Last Edit: 10/07/2012 15:34:19 by _system »


 

Offline thedoc

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What is the crystal structure of super bainite?
« Reply #1 on: 10/07/2012 15:34:19 »
We answered this question on the show...



Harry -   There's actually two kinds of crystals.  One in which the atoms are arranged at the corners of a cube with a single atom in the centre of the cube, so we call that body-centred cubic and the other one where you still have the atoms at the corners of a cube, but also at the centres of their faces, and thatís a face-centred cubic crystal structure.
Ben -   So that would be like looking at a die where every surface just has a one.  So itís impossible to roll a 6 because they're all just ones.
Harry -   Correct.
Ben -   And what is it about those structures that give them their properties?
Harry -   The body-centred one is very strong, but is not as tough as the face-centred cubic.  So if you combine them, then you have the ability to absorb energy as well as be strong.
Ben -   And so, what is it that actually causes these structures to form when youíve got it in your pizza oven for however long?
Harry -   First, we go to 1,000 degrees centigrade where everything is face-centred cubic and at 200 degrees centigrade, the body-centred cubic form is favoured so it grows inside the face-centred cubic form.
« Last Edit: 10/07/2012 15:34:19 by _system »
 

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What is the crystal structure of super bainite?
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