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TECHNICAL PAPERS

Effect of Thermal Property Variation on Surface Grooving

[+] Author and Article Information
Kia-Moh Teo, Khalid Lafdi

NSF-State-Industry, Center for Advanced Friction Studies, Southern Illinois University at Carbondale, Carbondale, IL 62901

J. Tribol 124(2), 274-280 (Apr 17, 2000) (7 pages) doi:10.1115/1.1398550 History: Revised April 17, 2000; Received August 17, 2001
Copyright © 2002 by ASME
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References

Figures

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Friction Assessment Screening Test (FAST) machine
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The thermal expansion of each material as a function of temperature
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Schematic of two different sandwiched samples made up of different thermal diffusivity materials
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Thermal diffusivity mapping result of a layer-structured sample made up of the low and high diffusivity materials over a scanning area of 1.0 cm×0.5 cm×0.5 mm resolution 18
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Surface profilometry of a layer-structured sample before friction test
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Surface images of the sandwiched samples: (a) layer-structure: material A and material C; (b) layer-structure: material A and material B; and (c) woven-structure: material B and material C
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Surface profile of the rotor disk after it was rubbed against a layered sample, which is made up of material A and B
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Surface profile of the rotor disk after it was rubbed against a layered sample, which is made up of material A and C
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Temperature profiles, recorded 2 mm from the friction surface, of the middle layers. The thermocouples were located at the center of the middle layers.
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Surface matching of the layered sample (stator) and the rotor disk
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Bright field image of the friction debris using TEM
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TEM image of the black spot (tubular structures of the friction film). Thick and open graphene tubes (middle right inset is a model of a graphene sheet that can be easily folded at certain angles).
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Surface topography of the rotor disk after it was rubbed against a layered sample. The layers were oriented perpendicular to the rubbing direction.
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Surface topography of the rotor disk after it was rubbed against a woven-structured sample
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High magnification TEM image of the friction film on the disk that was subjected to layer-structured sample with the sliding direction perpendicular to the layer
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An experiment using a laser beam to provide the temperature variation and thermal diffusivity variation across the surface
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Low magnification images of friction surfaces (a) image of the rotor disk; (b) images of 1.27×1.27 cm sample
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Rotor’s surface topography, which was taken across the slit using stylus profilometer

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