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Tribology Letters
Erschienen in: Tribology Letters 1/2010

01.04.2010 | Original Paper

Size, Shape, and Elemental Composition of Airborne Wear Particles from Disc Brake Materials

verfasst von: Jens Wahlström, Lars Olander, Ulf Olofsson

Erschienen in: Tribology Letters | Ausgabe 1/2010

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Abstract

During braking, both the rotor and pads experience wear, generating particles that may become airborne. In field tests, it is difficult to distinguish these particles from others in the surrounding environment, so it is preferable to use laboratory test stands to study the amount of airborne wear particles generated. The purpose of this work is to investigate the possibility of separate, capture, and analyze airborne wear particles generated by a disc brake in a disc brake assembly test stand. This test stand used allows the cleanliness of the air surrounding the test specimens to be controlled and thus the airborne portion of the wear particles to be studied separately. One pair each of low-metallic (LM) and non-asbestos organic (NAO) brake pads was tested against grey cast iron rotors. Before testing, the elemental contents of the brake materials were analyzed using glow discharge optical emission spectroscopy (GDOES). The concentration and size of airborne wear particles were measured online during testing. In addition, airborne wear particles were collected on filters during the tests and afterward analyzed using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX). The analyzed wear particles contained elements such as iron, titanium, zinc, barium, manganese, and copper. Both the low-metallic and non-asbestos organic type of brake pads tested display a bimodal size distribution with peaks at 280 and 350 nm. Most of the airborne particles generated have a diameter smaller than 2.5 μm.
Vorheriger Artikel Molecular Deformation Mechanisms in UHMWPE During Tribological Loading in Artificial Joints
Nächster Artikel Influence of Steel Type on the Propensity for Tribochemical Wear in Boundary Lubrication with a Wind Turbine Gear Oil

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Metadaten
Titel
Size, Shape, and Elemental Composition of Airborne Wear Particles from Disc Brake Materials
verfasst von
Jens Wahlström
Lars Olander
Ulf Olofsson
Publikationsdatum
01.04.2010
Verlag
Springer US
Erschienen in
Tribology Letters / Ausgabe 1/2010
Print ISSN: 1023-8883
Elektronische ISSN: 1573-2711
DOI
https://doi.org/10.1007/s11249-009-9564-x

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