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The University of Southampton
nC2 An Enterprise Consultancy Unit

Sliding Wear

Sliding wear is a form of wear involving two surfaces in relative motion, which often results in the removal of material in form of debris and ploughing of one or both surfaces.

At nC2 we have 2 test rigs to measure sliding wear, the TE77 and pin-on-disc tribometers.

Image of TE77 sliding wear rig used for evaluation of lubricants, materials, coatings and surface treatments.
The TE77 High Frequency Friction Machine is a versatile linear reciprocating tribometer typically used for evaluation of lubricants, materials, coatings and surface treatments.
The TE77 meets the requirements of ASTM G 133 and ASTM G 181
The test rig/method meets the requirements for ASTM G 133 which addresses the dry and lubricated wear of ceramics, metals and ceramic composites and also for ASTM G 181
Different types of test geometries and computerised control allows measurements of friction, linear wear and electrical contact resistance (ECR).
Different types of test geometries can be employed, including pin-on-plate (point contact), cylinder-on-plate (line contact), and flaton-plate (area contact). Computerised testing allows control of the load (>5 N - 1000 N), temperature (≤ 600°C), while measuring friction, linear wear and ECR
The Pin on disk conforms to ASTM G99 and is used for both dry and lubricated conditions
the pin-on-disc test rig employs a unidirectional motion in which a stationary pin is held under load against a rotating disc. The rig can be used for both dry and lubricated tests and complies with the ASTM G99 standard test method.
Slideshow image
The pin on disk measure various tribological parameters such as friction, linear wear, electrostatic/tribo-charging measurement and acoustic emission. Typical sliding velocity and normal load range that are possible on the pin-on-disc are ~0.5 – 6 m/s and 5 – 250 N respectively.

TE77

The TE77 High Frequency Friction Machine is a versatile linear reciprocating tribometer typically used for evaluation of lubricants, materials, coatings and surface treatments. The test rig/method meets the requirements for ASTM G 133 "Standard Test Method for Linearly Reciprocating Ball on Flat Sliding Wear", which addresses the dry and lubricated wear of ceramics, metals and ceramic composites and also for ASTM G 181 "Standard Practice for Conducting Friction Tests of Piston Ring and Cylinder Liner Materials Under Lubricated Conditions".

Different types of test geometries can be employed on the TE77, which include pin-on-plate (point contact), cylinder-on-plate (line contact), and flaton-plate (area contact). Computerised testing allows control of the load (>5 N - 1000 N), temperature (≤ 600°C), while measuring friction, linear wear and electrical contact resistance (ECR). Tests can be performed under both dry and lubricated conditions. The maximum stroke length on this machine is 25 mm.

Pin on Disk

the pin-on-disc test rig employs a unidirectional motion in which a stationary pin is held under load against a rotating disc. The rig can be used for both dry and lubricated tests and complies with the ASTM G99 standard test method. The type of pin-on-disc currently housed in nCATS/nC2 laboratory is highly instrumented to measure various tribological parameters such as friction, linear wear, electrostatic/tribo-charging measurement and acoustic emission. Typical sliding velocity and normal load range that are possible on the pin-on-disc are ~0.5 – 6 m/s and 5 – 250 N respectively. Various coated and uncoated bulk materials can be studied using the pin-on-disc.

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