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Tribometers and wear friction tribology from Scitech

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article image The Nanovea Tribometer features a 20-bit position encoder
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Scitech  introduces the Nanovea Tribometer designed for testing precise and repeatable wear and friction using ISO and ASTM compliant rotative and linear modes.
Featuring a high quality motor and a 20-bit position encoder, the Tribometer provides access to an unmatched range of rotational speeds from 0.01 to 2000 rpm. The high resolution allows the data to be accurately recorded at specified intervals of time or position (>0.006º). An integrated self-tuning system in the motor ensures speed remains calibrated through time. Full and precise control of the motor ensures that a series of step speeds can be run continuously during the tests.
Several testing options are available to closely match real environment conditions. The Tribometer comes standard with an acrylic enclosure and attached valves, which enable inert and other gases to achieve a controlled environment. An optional humidifier and dehumidifier module allows precise control of the humidity levels. For high temperature pin on disk up to 900ºC, an oven allows control to better than 1ºC. A linear heating plate is used for reciprocating test up to 300ºC.
Various cups are available for controlled liquid testing. Tests can either be done under full immersion or using the lubrication system with drop-by-drop or control spray. A liquid heating module is also available to provide controlled liquid heating up to 150ºC.
A full 3D non-contact optical profiler integrated on the Tribometer platform is available to precisely measure wear track volume and quantify wear loss quickly and conveniently without sample removal. The Tribometer software uses this information and the test parameters to calculate a precise wear rate for the specific test. The extended capability profiler can also be used for surface topography measurement including roughness. A flexible mobile imaging option allows zoom-in ability to record the sample surface for playback review
Rotative Mode (ASTM G99)

The pin-on-disk process involves the loading of a flat, pin or ball onto a test sample with a precisely known weight and at a specific position from the centre to create a circular wear track as the bottom plate rotates. The friction coefficient is determined during the test by measuring the deflection of the direct load cell. Wear rates for the pin and the disk are calculated from the volume of material lost during the test.
Linear Mode (ASTM G133)

The linear module reproduces the reciprocating motion typical in many real-world mechanisms. The instrument produces a friction coefficient for both the forward and backward movements of the stroke. This reciprocating technique is very useful for studying the static coefficient of friction over time.
High Temperature (Up to 900ºC) (Rotative only)

Analysis of friction and wear properties of materials at elevated temperatures is becoming increasingly important especially in applications such as the design of advanced fuel efficient combustion engines and power plants. The high temperature removable heating element enables the rotating disk to reach temperatures up to 900ºC, which makes it suitable for use in the study of high temperature ceramics, lubricants, oils, additives and self-lubricating materials.

High Temperature (Up to 300ºC) (Linear only)

This range is available for wear and friction testing of in-situ conditions in a range of deposition technologies, and is also ideal to study polymers just under their melting point.
Lubrication System

An advanced lubrication system makes it possible for drop-by-drop or controlled spray testing on the surface. Specialised cups with spill protection features are available for submerged testing.

Liquid Heating Module (Up to 150°C)

A heating coil is available to control liquid temperature up to 150°C, allowing temperatures near 37°C, which are suitable for bio material studies of wear and friction properties under bodily fluid, such as those found in artificial joint applications.

Humidity Control System

A standard acrylic enclosure makes it possible to use specific salt baths to create various humid atmospheres. A full humidity control system is available for applications requiring a higher level of control. This advanced option includes a dehumidification and humidification apparatus in addition to the automatic humidity controller with sensor.

Electrical Resistance Contact Detector

An electrical rotative connector can be installed at the base of the motor to provide electrical contact to the rotating sample under test, helping to extend the capability of the Tribometer, and enabling measurement of the change in resistance during wear of an insulator coating to a conductive substrate or connecting a device under test to detect the exact moment when the device fails under wear testing. It is also useful in measuring corrosion with wear using a specific corrosion cell, electrodes and potentiostat.

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