Annoyed about coefficient of friction -- What is lowest possible?

[Dinheirow]

Just wondering, what would be the lowest coefficient of friction value we know nowadays? From what material is it? Does the temperature between two surfaces interferes on the friction coefficient value?

 

[paisiello2]

Steel on ice = 3%

Coefficient can go up with temperature.

 

[CWatters]

Think I've managed to google up a claim of 0.4%...

http://www.sciencedirect.com/science/article/pii/S0043164812002736

In a ball-on-disc wear test, an alumina ceramic body sliding against a silicon nitride ceramic body in water achieved an ultra-low friction coefficient (ULFC) of 0.004.

 

[Dinheirow]

Cool, thanks

 

[paisiello2]

I can one up you even more:
synovial joints in humans =0.3%

http://hypertextbook.com/facts/2007/ConnieQiu.shtml