Super Lubricity

[MolaKule]

What value of Coefficient of Friction (COF) defines Super Lubricity?



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[Pontual]

Hydrodinamic film. Stribeck curve end.

 

[Kool1]

A friction coefficient below 0.01

 

[MolaKule]

Originally Posted By: Pontual
Hydrodinamic film. Stribeck curve end.


-1

 

[MolaKule]

Originally Posted By: Kool1
A friction coefficient below 0.01


Lower.

 

[lubricatosaurus]

friction coefficient <0.001

 

[lubricatosaurus]

Kool1 was right according to http://pubs.rsc.org/en/content/articlelanding/2015/ra/c5ra10834a#!divAbstract

 

[skyactiv]

What is .004?

 

[lubricatosaurus]

Kool1 is wrong according to http://www.nature.com/articles/srep07226

 

[MolaKule]

Originally Posted By: lubricatosaurus
friction coefficient div>



Close.

Hint: What is the value at which a COF falls into the Super Lubricity definition?

Hint: <0.xxx

 

[donnyj08]

What is

 

[Carbon12]

When the COF is equal to zero

 

[OneEyeJack]

Isn't superlubricity a frictionless tribological state sometimes occurring at nanoscale level?

I thought a registry index was used instead of a coefficient of friction number.

 

[MolaKule]

Super Lubricity has recently been proven at the macroscale level with nickel on DLC.

So a COF can be defined for the macroscale.

Hint: What is the value at which a COF falls into the Super Lubricity definition?

Hint:

 

[MolaKule]

Good try all.

lubricatosaurus and skyactiv offered values closest to the Super Lubricity value, but no joy.

Super Lubricity or superlubricity is defined as to when two surfaces in contact show a resulting COF of < 0.005.

 

[miro]

It is nice to see how the old an forgotten ¨mechanical watch¨ technology appears now in much bigger size, like car engine.
The language development is also interesting. 150...200years ago the Swiss watch makers used superlative words ¨super very high ultra¨ sparingly.