Effect of graphite content on the tribological behavior of a Cu-Fe-C based friction material sliding against FC30 cast iron

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Abstract

Focus of the study has been placed on the effect of graphite content on tribological behavior of a Cu-Fe-C based friction material sliding against FC30 cast iron. Experimental results indicated that, after sintering in air, the densities of Cu-Fe-C specimens decreased, oxygen contents increased, and essentially all original metallic constituents turned into oxides. As graphite content increased, the amounts of Fe2O3, Cu2O and Cu-Sn decreased, while CuO and FeSn2 contents increased. The friction coefficient profiles of Cu-10%Steel wool-10%Al-10%Al2O3-10%Sn (vol%) material (C0) and Cu-10%Steel wool-10%C-10%Al-10%Al2O3-10%Sn (vol%) material (C10) are almost identical. After sliding for a few minutes, their friction coefficients start to decay. The friction coefficient of Cu-10%Steel wool-20%C-10%Al-10%Al2O3- 10%Sn (vol%) material (C20) maintained to be high and stable throughout tests. The mass loss of C20 was larger than that of C0 or C10. The mass loss of FC30 sliding against C20 was smaller than that of FC30 sliding against C0 or C10. While both particulate and film types of debris were observed on each Cu-Fe-C specimen, more particulate debris was observed on C0 and C10 than on C20 surface. Chemical analysis of worn surfaces indicated that Fe was dominant on C0 and C10 surfaces, while large amounts of Fe and Cu were detected on the worn surfaces of both C20 and FC30.

Original languageEnglish
Pages (from-to)1225-1230
Number of pages6
JournalMaterials Transactions
Volume44
Issue number6
DOIs
Publication statusPublished - 2003 Jan 1

Fingerprint

Friction materials
Graphite
Cast iron
wool
sliding
casts
Steel
friction
graphite
Wool
coefficient of friction
iron
steels
Friction
debris
Debris
particulates
chemical analysis
Oxides
sintering

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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title = "Effect of graphite content on the tribological behavior of a Cu-Fe-C based friction material sliding against FC30 cast iron",
abstract = "Focus of the study has been placed on the effect of graphite content on tribological behavior of a Cu-Fe-C based friction material sliding against FC30 cast iron. Experimental results indicated that, after sintering in air, the densities of Cu-Fe-C specimens decreased, oxygen contents increased, and essentially all original metallic constituents turned into oxides. As graphite content increased, the amounts of Fe2O3, Cu2O and Cu-Sn decreased, while CuO and FeSn2 contents increased. The friction coefficient profiles of Cu-10{\%}Steel wool-10{\%}Al-10{\%}Al2O3-10{\%}Sn (vol{\%}) material (C0) and Cu-10{\%}Steel wool-10{\%}C-10{\%}Al-10{\%}Al2O3-10{\%}Sn (vol{\%}) material (C10) are almost identical. After sliding for a few minutes, their friction coefficients start to decay. The friction coefficient of Cu-10{\%}Steel wool-20{\%}C-10{\%}Al-10{\%}Al2O3- 10{\%}Sn (vol{\%}) material (C20) maintained to be high and stable throughout tests. The mass loss of C20 was larger than that of C0 or C10. The mass loss of FC30 sliding against C20 was smaller than that of FC30 sliding against C0 or C10. While both particulate and film types of debris were observed on each Cu-Fe-C specimen, more particulate debris was observed on C0 and C10 than on C20 surface. Chemical analysis of worn surfaces indicated that Fe was dominant on C0 and C10 surfaces, while large amounts of Fe and Cu were detected on the worn surfaces of both C20 and FC30.",
author = "Chen, {Sun Zen} and Jiin-Huey Chern and Chien-Ping Ju",
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AU - Chen, Sun Zen

AU - Chern, Jiin-Huey

AU - Ju, Chien-Ping

PY - 2003/1/1

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N2 - Focus of the study has been placed on the effect of graphite content on tribological behavior of a Cu-Fe-C based friction material sliding against FC30 cast iron. Experimental results indicated that, after sintering in air, the densities of Cu-Fe-C specimens decreased, oxygen contents increased, and essentially all original metallic constituents turned into oxides. As graphite content increased, the amounts of Fe2O3, Cu2O and Cu-Sn decreased, while CuO and FeSn2 contents increased. The friction coefficient profiles of Cu-10%Steel wool-10%Al-10%Al2O3-10%Sn (vol%) material (C0) and Cu-10%Steel wool-10%C-10%Al-10%Al2O3-10%Sn (vol%) material (C10) are almost identical. After sliding for a few minutes, their friction coefficients start to decay. The friction coefficient of Cu-10%Steel wool-20%C-10%Al-10%Al2O3- 10%Sn (vol%) material (C20) maintained to be high and stable throughout tests. The mass loss of C20 was larger than that of C0 or C10. The mass loss of FC30 sliding against C20 was smaller than that of FC30 sliding against C0 or C10. While both particulate and film types of debris were observed on each Cu-Fe-C specimen, more particulate debris was observed on C0 and C10 than on C20 surface. Chemical analysis of worn surfaces indicated that Fe was dominant on C0 and C10 surfaces, while large amounts of Fe and Cu were detected on the worn surfaces of both C20 and FC30.

AB - Focus of the study has been placed on the effect of graphite content on tribological behavior of a Cu-Fe-C based friction material sliding against FC30 cast iron. Experimental results indicated that, after sintering in air, the densities of Cu-Fe-C specimens decreased, oxygen contents increased, and essentially all original metallic constituents turned into oxides. As graphite content increased, the amounts of Fe2O3, Cu2O and Cu-Sn decreased, while CuO and FeSn2 contents increased. The friction coefficient profiles of Cu-10%Steel wool-10%Al-10%Al2O3-10%Sn (vol%) material (C0) and Cu-10%Steel wool-10%C-10%Al-10%Al2O3-10%Sn (vol%) material (C10) are almost identical. After sliding for a few minutes, their friction coefficients start to decay. The friction coefficient of Cu-10%Steel wool-20%C-10%Al-10%Al2O3- 10%Sn (vol%) material (C20) maintained to be high and stable throughout tests. The mass loss of C20 was larger than that of C0 or C10. The mass loss of FC30 sliding against C20 was smaller than that of FC30 sliding against C0 or C10. While both particulate and film types of debris were observed on each Cu-Fe-C specimen, more particulate debris was observed on C0 and C10 than on C20 surface. Chemical analysis of worn surfaces indicated that Fe was dominant on C0 and C10 surfaces, while large amounts of Fe and Cu were detected on the worn surfaces of both C20 and FC30.

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