The tribological behavior of a commercial brake pad material, wear tested under dry sliding conditions against a cast iron counterface disc with a pin-on-disc apparatus, was investigated. Wear tests were conducted at the following disc temperatures: 25 degrees C, 170 degrees C, 200 degrees C, 250 degrees C, 300 degrees C and 350 degrees C. Above 170 degrees C a transition from mild to severe wear was observed. At 25 degrees C and 170 degrees C, the friction layer on the pin surface consists of primary and compacted secondary plateaus. At 200 degrees C and above, a progressive reduction of the pin surface coverage by the secondary plateaus, that are barely present after the 350 degrees C test, is observed. Wear tracks on the discs derive from wear fragments due to the tribo-oxidation of the disc itself and from the wearing out of the pin material. The observed tribological behavior is very much influenced by the thermal degradation of the phenolic binder of the friction material, confirmed by thermogravimetric analyses, conducted on purpose on the pin material. Raman spectroscopy indicated the presence of carbonaceous products on the high temperature worn out pin surface. Although referring to rather extreme and simplified sliding conditions, the results obtained in this study provide useful indications on the role of the thermal stability of the organic component.

Role of the friction layer in the high-temperature pin-on-disc study of a brake material / Verma, Piyush Chandra; Ciudin, Rodica; Bonfanti, Andrea; Aswath, Pranesh; Straffelini, Giovanni; Gialanella, Stefano. - In: WEAR. - ISSN 0043-1648. - 346-347:(2016), pp. 56-65. [10.1016/j.wear.2015.11.004]

Role of the friction layer in the high-temperature pin-on-disc study of a brake material

Verma, Piyush Chandra;Bonfanti, Andrea;Straffelini, Giovanni;Gialanella, Stefano
2016-01-01

Abstract

The tribological behavior of a commercial brake pad material, wear tested under dry sliding conditions against a cast iron counterface disc with a pin-on-disc apparatus, was investigated. Wear tests were conducted at the following disc temperatures: 25 degrees C, 170 degrees C, 200 degrees C, 250 degrees C, 300 degrees C and 350 degrees C. Above 170 degrees C a transition from mild to severe wear was observed. At 25 degrees C and 170 degrees C, the friction layer on the pin surface consists of primary and compacted secondary plateaus. At 200 degrees C and above, a progressive reduction of the pin surface coverage by the secondary plateaus, that are barely present after the 350 degrees C test, is observed. Wear tracks on the discs derive from wear fragments due to the tribo-oxidation of the disc itself and from the wearing out of the pin material. The observed tribological behavior is very much influenced by the thermal degradation of the phenolic binder of the friction material, confirmed by thermogravimetric analyses, conducted on purpose on the pin material. Raman spectroscopy indicated the presence of carbonaceous products on the high temperature worn out pin surface. Although referring to rather extreme and simplified sliding conditions, the results obtained in this study provide useful indications on the role of the thermal stability of the organic component.
2016
Verma, Piyush Chandra; Ciudin, Rodica; Bonfanti, Andrea; Aswath, Pranesh; Straffelini, Giovanni; Gialanella, Stefano
Role of the friction layer in the high-temperature pin-on-disc study of a brake material / Verma, Piyush Chandra; Ciudin, Rodica; Bonfanti, Andrea; Aswath, Pranesh; Straffelini, Giovanni; Gialanella, Stefano. - In: WEAR. - ISSN 0043-1648. - 346-347:(2016), pp. 56-65. [10.1016/j.wear.2015.11.004]
File in questo prodotto:
File Dimensione Formato  
2016_Role of the friction layer_WEAR_346-347_56-65.pdf

Solo gestori archivio

Tipologia: Versione editoriale (Publisher’s layout)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 3.73 MB
Formato Adobe PDF
3.73 MB Adobe PDF   Visualizza/Apri
HT_Role_friction_layer_manuscript_final_revised.pdf

accesso aperto

Tipologia: Pre-print non referato (Non-refereed preprint)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 1.27 MB
Formato Adobe PDF
1.27 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: https://hdl.handle.net/11572/159805
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 132
  • ???jsp.display-item.citation.isi??? 113
social impact