I saw something in Nature.

[amp]

about ultra-hard ceramics could someone tell me a little about them.

[LURCH]

I know that ceramic fibers are used in sheets to protect the Space Staion from micrometeorites. There is talk of putting these sheets into bullet-proof vests and armor plating.

In industrial work, steel and harder metals are often machined by cutting devices with a ceramic blade, because ceramics are very hard and take a long time to wear out.

Here's a link (http://www.ultrahardmaterials.com/ceramics.htm) with some info on how they're made.