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Mapping of friction, wear and particle emissions from high-speed train brakes

Lyu, Yezhe LU orcid ; Zhang, Qixiang ; Tanzeglock, Leonie ; Tu, Minghui ; Mo, Jiliang ; Okuda, Tomoaki ; Pagels, Joakim LU and Wahlström, Jens LU orcid (2025) In Wear 572-573.
Abstract

This study reports contact pressure-sliding speed maps for friction, wear and particle emissions from high-speed train brakes. Two particle spectrometers measured the airborne wear particles generated with a pin-on-disc tribometer. Particles were characterized with transmission electron microscopy and energy dispersive X-ray fluorescence. The results indicate that both the friction and wear of brake pads and discs gradually decreased as sliding speed increased, which showed less dependence on contact pressure. Particle concentrations gradually increased with increasing sliding speed. Low contact pressure and sliding speed tended to generate particles smaller than 2.5 μm. The train brake emitted particles had higher average geometric... (More)

This study reports contact pressure-sliding speed maps for friction, wear and particle emissions from high-speed train brakes. Two particle spectrometers measured the airborne wear particles generated with a pin-on-disc tribometer. Particles were characterized with transmission electron microscopy and energy dispersive X-ray fluorescence. The results indicate that both the friction and wear of brake pads and discs gradually decreased as sliding speed increased, which showed less dependence on contact pressure. Particle concentrations gradually increased with increasing sliding speed. Low contact pressure and sliding speed tended to generate particles smaller than 2.5 μm. The train brake emitted particles had higher average geometric mean diameters than the car brake emitted particles, which were primarily composed of iron, copper and chromium and were oxidized.

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Please use this url to cite or link to this publication:
author
; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Brake emissions, Copper-based brake pads, Railway, Transmission electron microscopy
in
Wear
volume
572-573
article number
206027
pages
10 pages
publisher
Elsevier
external identifiers
  • scopus:86000762360
ISSN
0043-1648
DOI
10.1016/j.wear.2025.206027
language
English
LU publication?
yes
id
6a6dc042-98f0-4ccf-b436-197b72aa5faf
date added to LUP
2025-03-27 07:12:57
date last changed
2025-04-04 14:26:50
@article{6a6dc042-98f0-4ccf-b436-197b72aa5faf,
  abstract     = {{<p>This study reports contact pressure-sliding speed maps for friction, wear and particle emissions from high-speed train brakes. Two particle spectrometers measured the airborne wear particles generated with a pin-on-disc tribometer. Particles were characterized with transmission electron microscopy and energy dispersive X-ray fluorescence. The results indicate that both the friction and wear of brake pads and discs gradually decreased as sliding speed increased, which showed less dependence on contact pressure. Particle concentrations gradually increased with increasing sliding speed. Low contact pressure and sliding speed tended to generate particles smaller than 2.5 μm. The train brake emitted particles had higher average geometric mean diameters than the car brake emitted particles, which were primarily composed of iron, copper and chromium and were oxidized.</p>}},
  author       = {{Lyu, Yezhe and Zhang, Qixiang and Tanzeglock, Leonie and Tu, Minghui and Mo, Jiliang and Okuda, Tomoaki and Pagels, Joakim and Wahlström, Jens}},
  issn         = {{0043-1648}},
  keywords     = {{Brake emissions; Copper-based brake pads; Railway; Transmission electron microscopy}},
  language     = {{eng}},
  month        = {{07}},
  publisher    = {{Elsevier}},
  series       = {{Wear}},
  title        = {{Mapping of friction, wear and particle emissions from high-speed train brakes}},
  url          = {{http://dx.doi.org/10.1016/j.wear.2025.206027}},
  doi          = {{10.1016/j.wear.2025.206027}},
  volume       = {{572-573}},
  year         = {{2025}},
}