A significant fraction of the non-exhaust particulate matter emissions from vehicular traffic comprises fine particles from the wear debris of brake pads and discs. Recent studies have shown that these emissions can be consistently reduced by using wear resistant disc coatings. This study thoroughly analyses the debris produced by a low-met brake pad, which is dyno-bench tested against both cast iron and WC-CoCr-coated brake discs. To achieve this, particles in the size range of 2.5 µm to 30 nm were collected and characterized. The results showed a consistent reduction in the particle emission as well as in the concentration of iron oxides, which are mainly released from the disc tribo-oxidation in the coated disc. Furthermore, a few tungsten carbides, released from the coating, were also observed in the wear fragments. The results of this study can be useful for improving the protective coating and consequently help in reducing particulate matter emission further.

Characterization of airborne wear debris produced by brake pads pressed against HVOF-coated discs / Menapace, C.; Mancini, A.; Federici, M.; Straffelini, G.; Gialanella, S.. - In: FRICTION. - ISSN 2223-7690. - 8:2(2020), pp. 421-432. [10.1007/s40544-019-0284-4]

Characterization of airborne wear debris produced by brake pads pressed against HVOF-coated discs

Menapace C.;Straffelini G.;Gialanella S.
2020

Abstract

A significant fraction of the non-exhaust particulate matter emissions from vehicular traffic comprises fine particles from the wear debris of brake pads and discs. Recent studies have shown that these emissions can be consistently reduced by using wear resistant disc coatings. This study thoroughly analyses the debris produced by a low-met brake pad, which is dyno-bench tested against both cast iron and WC-CoCr-coated brake discs. To achieve this, particles in the size range of 2.5 µm to 30 nm were collected and characterized. The results showed a consistent reduction in the particle emission as well as in the concentration of iron oxides, which are mainly released from the disc tribo-oxidation in the coated disc. Furthermore, a few tungsten carbides, released from the coating, were also observed in the wear fragments. The results of this study can be useful for improving the protective coating and consequently help in reducing particulate matter emission further.
2
Menapace, C.; Mancini, A.; Federici, M.; Straffelini, G.; Gialanella, S.
Characterization of airborne wear debris produced by brake pads pressed against HVOF-coated discs / Menapace, C.; Mancini, A.; Federici, M.; Straffelini, G.; Gialanella, S.. - In: FRICTION. - ISSN 2223-7690. - 8:2(2020), pp. 421-432. [10.1007/s40544-019-0284-4]
File in questo prodotto:
File Dimensione Formato  
FRICTION_paper_published.pdf

accesso aperto

Tipologia: Versione editoriale (Publisher’s layout)
Licenza: Creative commons
Dimensione 2.67 MB
Formato Adobe PDF
2.67 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11572/260392
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 20
  • ???jsp.display-item.citation.isi??? 19
social impact