1 / 43

Absolutely pure iron

Absolutely pure iron. Five plates and two rods, National Art Gallery, Washington. Smithsonian: Natural History Museum. Fe-Ni alloy, 0.0021072 mm thick. Smithsonian: Air & Space. Inter-galactic gas. Fe. guess what?. How pure can pure be?. Entropy. P. P / 2. o. m. B. o. m. A.

lmckee
Télécharger la présentation

Absolutely pure iron

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Absolutely pure iron

  2. Five plates and two rods, National Art Gallery, Washington

  3. Smithsonian: Natural History Museum

  4. Fe-Ni alloy, 0.0021072 mm thick Smithsonian: Air & Space

  5. Inter-galactic gas Fe guess what?

  6. How pure can pure be? Entropy P P / 2

  7. o m B o m A Gibbs free energy per mole Incredibly difficult to get extreme purity! A B Concentration x of B

  8. hexagonal close-packed

  9. hexagonal close-packed cubic close-packed

  10. body-centred cubic cubic close-packed

  11. -35 -45 -55 -65 pure iron Cubic-P Diamond cubic Cohesive energy (eV/atom) Hexagonal-P b.c.c c.c.p h.c.p 0.8 1.0 1.2 1.4 1.6 Normalised volume Paxton et al. (1990)

  12. electron has a spin; effectively a current in a loop, creating a little magnet; this is the Bohr magneton

  13. Bundy (1965)

  14. Bhor magnetons Iron atom in ferrite 2.2 Iron atom in thin film 3.1 Iron atom in austenite 2.8 or 0.6

  15. Fe Ru 6d 2s Os Hs

  16. Iron [Ar] + 8 e- b.c.c Ruthenium [Kr] + 8 e- h.c.p Osmium [Xe] + 14f + 8 e- h.c.p Hassium [Rn] + 14f + 8 e- ???

  17. body-centred cubic (ferrite) cubic close-packed (austenite) hexagonal close-packed double hexagonal close-packed trigonal tetragonal magnetic transitions pure iron

  18. DISPLACIVE RECONSTRUCTIVE

  19. The Song

  20. an apple weighs 1 Newton = 1 Pa 1 m

  21. 1 Denier: weight in grams, of 9 km of fibre 10 Denier Scifer is 9 Denier

  22. Scifer, 5.5 GPa with ductility! Kobe Steel

  23. Atom probe image of Scifer, 5.5 GPa steel wire Bhadeshia and Harada, 1993

  24. TRANSPARENT STEEL:the teaching of creative design by Harry Bhadeshia Materials World, March 1995, p. 128

  25. Why is iron opaque? opaque transparent

  26. 1991 Sumio Iijima studied soot, found nanotubes, nested like Russian dolls. Nanotubes grow efficiently from gas with iron as catalyst.

  27. Perception of smell template model spectroscopic model Luca Turin

  28. nickel in cage molecule iron in cage molecule Luca Turin

  29. 180 to 220 °C Cooking temperature?

  30. Pizza steel, cooked at 200 °C for 20 days 2.5 billion apples on one square meter Caballero, Mateo & Bhadeshia

  31. Longest (2 km) single-span bridge, near Kobe, Japan

  32. Rope bridge, Atlantis, Bahamas

  33. www.msm.cam.ac.uk/phase-trans/2001/pureiron.ppt ……/steel3.wav

More Related