That is cool!
My company has an electron microscope in the local metals lab - it is a Hitachi unit. When I hit the lotto, I'll have one!!
The cool thing (to me ) is that you can put a piece of metal in the scope, then focus in on a spot, and with the software the scope will show you the base elements of the material and the percentages etc - for a knife nut, that is just too much for words!
Thanks for the link - I hope some of the folks on here send some samples in (not sure how you would send a sample of a knife in - but I am sure someone will figure that out)
Now - back to that web site to browse the images -