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Dinheirow
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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?
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.
Coefficient of friction is a measure of the resistance between two surfaces in contact with each other. It tells us how difficult it is to slide one surface over the other.
The coefficient of friction is important because it helps us understand how much force is needed to overcome the resistance between two surfaces. This is crucial in many applications, such as designing machines or determining the safety of surfaces for walking or driving.
The coefficient of friction is calculated by dividing the force required to move an object over a surface by the weight of the object. It is usually represented by the symbol "μ" and has no unit of measurement.
The coefficient of friction can be affected by various factors, such as surface roughness, material type, temperature, and the presence of lubricants. It can also vary depending on the direction and speed of the movement between the surfaces.
The lowest possible coefficient of friction is 0, which indicates that there is no resistance between the two surfaces and they can move easily without any force. This is only achievable in ideal conditions and is not common in real-world scenarios.