Cermet vs Ceramic

[kilyung]

Elliott (mask1196) brought to my attention the use of Cermet by AP in the Jarno Trulli edition ROO.

Originally Posted by mask1196

Forged Carbon Case ROO's are so comfortable on the wrist. JT is even lighter than the Bee for some reasons. Wearing the JT literally feels like not wearing anything at all, so light.

Whatever you choose man, you can't lose. These are such fantastic watches.

What's fascinating are the subtle differences in Cermet and Ceramic. Both have a Vickers hardness of 1450. However Cermet is lighter than Ceramic and has better deformation and shock resistance properties than Ceramic - I'm guessing that means less susceptible to cracking vs chipping. It's most used application is the space shuttle heat shields and carbide tipped tools. Ceramic is heavier but also resists staining better than Cermet. It's also characterized by a deep black vs Cermet's metallic grey. Today, AP uses Cermet exclusively for the JT edition. Just though you'd find this interesting. Elliott is absolutely right... Both are fantastic watches!