ArcherWatches, on 25 August 2011 - 03:45 AM, said:
Likely in this thread - discussed at some length what the processes are and the coatings.
Starts with a picture of a watch and ends up with brain-consuming zombies... typical FOOF thread...
To elaborate a bit on the "hardness" of DLC in layman terms.
Whenever DLC is "harder than something" depends on how you define hardness. The "units" DLC made of - amorphous carbon bits - are indeed "hard as diamond", but... there is a "but" of course
- the thickness of the coating is measured in micro/nanometers. This means that coating itself makes little to none contribution to "hardness" of the material watch user would perceive - such as say impact resistance. What I'm saying is, DLC will reduce friction coefficient and make abrasion against polished metal or rough cloth much less likely, however, if you impact the DLC coated surface on something, it is the hardness of the material under DLC layer that will determine the extent of damage - if the metal is soft it will ding, chip and take the coating with it.
Example - high-tec ceramics in bullet-proof vest and DLC coated steel plate. DLC might have similar hardness to ceramic measured on nanoscale, but take a plate of ceramics and DLC coated steel plate and fire AP round at it. It will bounce off ceramic insert and punch though the steel plate. Why? Because it's the bulk of the material that will determine the outcome, not the surface.