The role of copper on the friction and wear performance of automotive brake friction materials

Seong Jin Kim, Jae Young Lee, Jai Min Han, Yoon Cheol Kim, Hyun Dal Park, Sang Hun Sung, Jung Ju Lee, Jae Haeng Cha, Joong Ho Jo, Ho Jang

Research output: Contribution to journalConference article

2 Citations (Scopus)

Abstract

Copper has been regarded as one of the indispensable ingredients in the brake friction materials since it provides high thermal diffusivity at the sliding interface. However, the recent regulations against environmentally hazardous ingredients limit the use of copper in the commercial friction material and much effort has been made for the alternatives. In this work, the role of the cuprous ingredients such as copper fiber, copper powder, cupric oxide (CuO), and copper sulfide (CuS) are studied using the friction materials based on commercial formulations. The investigation was performed using a full inertial brake dynamometer and 1/5 scale dynamometer for brake performance and wear test. Results showed that the cuprous ingredients played a crucial role in maintaining the stable friction film at the friction interface, resulting in improved friction stability and reduced aggressiveness against counter disk. In particular, the addition of copper fiber or copper sulfide contributed to improved friction stability during effectiveness test. The test result also showed that the friction material containing 10 wt.% of cupric oxide exhibited better fade resistance without showing an abrupt decrease of friction coefficient during brake performance and wear tests. The addition of copper fiber showed better wear resistance compared to the friction material with cupric oxide, on the other hand, the increase of copper fiber showed an adverse effect in the wear resistance of the friction materials during wear tests up to 400°C.

Original languageEnglish
JournalSAE Technical Papers
DOIs
Publication statusPublished - 2011 Jan 1
EventSAE 2011 Annual Brake Colloquium and Engineering Display, BRAKE 2011 - New Orleans, LA, United States
Duration: 2011 Sep 182011 Sep 21

Fingerprint

Friction materials
Brakes
Wear of materials
Friction
Copper
Fibers
Dynamometers
Oxides
Wear resistance
Copper powder
Thermal diffusivity

ASJC Scopus subject areas

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering

Cite this

The role of copper on the friction and wear performance of automotive brake friction materials. / Kim, Seong Jin; Lee, Jae Young; Han, Jai Min; Kim, Yoon Cheol; Park, Hyun Dal; Sung, Sang Hun; Lee, Jung Ju; Cha, Jae Haeng; Jo, Joong Ho; Jang, Ho.

In: SAE Technical Papers, 01.01.2011.

Research output: Contribution to journalConference article

Kim, Seong Jin ; Lee, Jae Young ; Han, Jai Min ; Kim, Yoon Cheol ; Park, Hyun Dal ; Sung, Sang Hun ; Lee, Jung Ju ; Cha, Jae Haeng ; Jo, Joong Ho ; Jang, Ho. / The role of copper on the friction and wear performance of automotive brake friction materials. In: SAE Technical Papers. 2011.
@article{6d76998e18b247a4af765080d7870ade,
title = "The role of copper on the friction and wear performance of automotive brake friction materials",
abstract = "Copper has been regarded as one of the indispensable ingredients in the brake friction materials since it provides high thermal diffusivity at the sliding interface. However, the recent regulations against environmentally hazardous ingredients limit the use of copper in the commercial friction material and much effort has been made for the alternatives. In this work, the role of the cuprous ingredients such as copper fiber, copper powder, cupric oxide (CuO), and copper sulfide (CuS) are studied using the friction materials based on commercial formulations. The investigation was performed using a full inertial brake dynamometer and 1/5 scale dynamometer for brake performance and wear test. Results showed that the cuprous ingredients played a crucial role in maintaining the stable friction film at the friction interface, resulting in improved friction stability and reduced aggressiveness against counter disk. In particular, the addition of copper fiber or copper sulfide contributed to improved friction stability during effectiveness test. The test result also showed that the friction material containing 10 wt.{\%} of cupric oxide exhibited better fade resistance without showing an abrupt decrease of friction coefficient during brake performance and wear tests. The addition of copper fiber showed better wear resistance compared to the friction material with cupric oxide, on the other hand, the increase of copper fiber showed an adverse effect in the wear resistance of the friction materials during wear tests up to 400°C.",
author = "Kim, {Seong Jin} and Lee, {Jae Young} and Han, {Jai Min} and Kim, {Yoon Cheol} and Park, {Hyun Dal} and Sung, {Sang Hun} and Lee, {Jung Ju} and Cha, {Jae Haeng} and Jo, {Joong Ho} and Ho Jang",
year = "2011",
month = "1",
day = "1",
doi = "10.4271/2011-01-2367",
language = "English",
journal = "SAE Technical Papers",
issn = "0148-7191",
publisher = "SAE International",

}

TY - JOUR

T1 - The role of copper on the friction and wear performance of automotive brake friction materials

AU - Kim, Seong Jin

AU - Lee, Jae Young

AU - Han, Jai Min

AU - Kim, Yoon Cheol

AU - Park, Hyun Dal

AU - Sung, Sang Hun

AU - Lee, Jung Ju

AU - Cha, Jae Haeng

AU - Jo, Joong Ho

AU - Jang, Ho

PY - 2011/1/1

Y1 - 2011/1/1

N2 - Copper has been regarded as one of the indispensable ingredients in the brake friction materials since it provides high thermal diffusivity at the sliding interface. However, the recent regulations against environmentally hazardous ingredients limit the use of copper in the commercial friction material and much effort has been made for the alternatives. In this work, the role of the cuprous ingredients such as copper fiber, copper powder, cupric oxide (CuO), and copper sulfide (CuS) are studied using the friction materials based on commercial formulations. The investigation was performed using a full inertial brake dynamometer and 1/5 scale dynamometer for brake performance and wear test. Results showed that the cuprous ingredients played a crucial role in maintaining the stable friction film at the friction interface, resulting in improved friction stability and reduced aggressiveness against counter disk. In particular, the addition of copper fiber or copper sulfide contributed to improved friction stability during effectiveness test. The test result also showed that the friction material containing 10 wt.% of cupric oxide exhibited better fade resistance without showing an abrupt decrease of friction coefficient during brake performance and wear tests. The addition of copper fiber showed better wear resistance compared to the friction material with cupric oxide, on the other hand, the increase of copper fiber showed an adverse effect in the wear resistance of the friction materials during wear tests up to 400°C.

AB - Copper has been regarded as one of the indispensable ingredients in the brake friction materials since it provides high thermal diffusivity at the sliding interface. However, the recent regulations against environmentally hazardous ingredients limit the use of copper in the commercial friction material and much effort has been made for the alternatives. In this work, the role of the cuprous ingredients such as copper fiber, copper powder, cupric oxide (CuO), and copper sulfide (CuS) are studied using the friction materials based on commercial formulations. The investigation was performed using a full inertial brake dynamometer and 1/5 scale dynamometer for brake performance and wear test. Results showed that the cuprous ingredients played a crucial role in maintaining the stable friction film at the friction interface, resulting in improved friction stability and reduced aggressiveness against counter disk. In particular, the addition of copper fiber or copper sulfide contributed to improved friction stability during effectiveness test. The test result also showed that the friction material containing 10 wt.% of cupric oxide exhibited better fade resistance without showing an abrupt decrease of friction coefficient during brake performance and wear tests. The addition of copper fiber showed better wear resistance compared to the friction material with cupric oxide, on the other hand, the increase of copper fiber showed an adverse effect in the wear resistance of the friction materials during wear tests up to 400°C.

UR - http://www.scopus.com/inward/record.url?scp=85072364981&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85072364981&partnerID=8YFLogxK

U2 - 10.4271/2011-01-2367

DO - 10.4271/2011-01-2367

M3 - Conference article

AN - SCOPUS:85072364981

JO - SAE Technical Papers

JF - SAE Technical Papers

SN - 0148-7191

ER -