Copper-based sintered friction materials are most suitable for heavy-duty off-road vehicles, trains, aircraft, and military applications. This present study aims to investigate the tribological performance, dominating wear mechanism of an existing copper-tin sintered friction material that is being used in armoured fighting vehicle. The brake pad was tested as per IS 2742 using the chase test machine. Especially fade cycle was carried out till 441℃ to analyze the frictional response of the material. Physical, mechanical, and tribological properties were evaluated as per industrial standards. Morphological analysis was carried out using field emission scanning electron microscopy, and wear debris analysis was carried out using scanning electron microscopy–energy dispersive X-ray analysis and X-ray diffraction analysis. The dominating wear mechanisms were found to be delamination and abrasive wear. The investigated results showed a less wear rate of 0.05 cm3/MJ. However, results seem to be better for high-energy applications by exhibiting excellent mechanical properties.
Vineeth Kumar V and Senthil Kumaran S. Friction material composite: Types of brake friction material formulations and effects of various ingredients on brake performance – a review. Mater Res Express 2019; 6: 082005, DOI: 10.1088/2053-1591/ab2404.
2.
ChanDStachowiakGW. Review of automotive brake friction materials. Proc Inst Mech Eng Part D J Automob Eng2004; 218: 953–966.
3.
LiJYinYMaH. Preparation and properties of Fe3Al- based friction materials. Tribol Int2005; 38: 159.
4.
SuLGaoFHanX, et al.Tribological behavior of copper–graphite powder third body on copper-based friction materials. Tribol Lett2015; 60: 30.
5.
VermaPCCiudinRBonfantiA, et al.Role of the friction layer in the high-temperature pin-on-disc study of a brake material. Wear2016; 56: 346.
6.
Sato T, Hirai Y, Fukui T, et al. Effects of dispersed sulfides in bronze under line contact conditions. In: In: Proceedings of Malaysian international tribology conference, 2015, pp.84–85.
7.
RoussetteODesplanquesYDegallaixG. An investigation into friction behaviour of dispersion-strengthened copper under severe railway braking conditions. Tribol Lett2006; 21: 101–105.
8.
JangHKoKKimSJ, et al.The effect of metal fibers on the friction performance of automotive brake friction materials. Wear2004; 256: 406–414.
9.
ŐsterleWPrietzelCKloßH, et al.On the role of copper in brake friction materials. Tribol Int2010; 43: 2317–2326.
10.
ThiyagarajanVKalaichelvanKSrinivasanK, et al.Influence of specific heat capacity on hybrid non-asbestos brake pad formulation. J Balk Tribol Assoc2015; 21: 102–119.
11.
XiaoYZhangZYaoP, et al.Mechanical and tribological behaviors of copper metal matrix composites for brake pads used in high-speed trains. Tribol Int2018; 119: 585–592.
12.
Achtelik-FranczakAMatulaGDobrzanskiLB, et al.Fabrication technologies of the sintered materials including materials for medical and dental application. Powder Metall – Fundam Case Stud. 2017; 2017: 17–52.
13.
ZhanYZangG. Friction and wear behavior of copper matrix composites reinforced with SiC and graphite particles. Tribol Lett2004; 17: 91–98.
14.
ChenBBiQYangJ, et al.Tribological properties of solid lubricants (graphite, h-BN) for Cu-based P/M friction composites. Tribol Int2008; 41: 1145–1152.
15.
SpurrRT. Friction materials for brakes. Tribology1971; 4: 75–81.
16.
Dhanalakshmi S, Sivakumar P, Anil Kumar VN, et al. Development and characterisation of copper based brake pads for armoured fighting vehicles. In: National conference on automotive manufacturing, PSG College of Technology, Coimbatore, 2007.
17.
KatoHTakamaMIwaiY, et al.Wear and mechanical properties of sintered copper-tin composites containing graphite or molybdenum disulfide. Wear2003; 255: 573–578.
18.
PengTYanQZhangX. Stability of metal matrix composite pads during high-speed braking. Tribol Lett2018; 66: 1–13.
19.
Vineeth KumarVSenthil KumaranSDhanalakshmiS, et al.Tribological performance evaluation of fused mullite-reinforced hybrid composite brake pad for defence application. J Brazilian Soc Mech Sci Eng2019; 41: 1–10.
20.
Vijay R, Manoharan S, Singaravelu DL and Kchaou M. Experimental investigation on the tribo-thermal properties of brake friction materials containing various forms of graphite: A comparative study. Arab J Sci Eng 2019; 44: 1459–1473.
21.
Y?lmaz SO, Aksoy M, Ozel C, et al. Effect of FeCr intermetallic on wear resistance of Fe_based composites. In: Pithli H (ed.) Tribology in engineering. Rijeka: InTech, 2013, pp. 3–14.
22.
AkinciASenSSenU. Friction and wear behavior of zirconium oxide reinforced PMMA composites. Compos Part B2014; 56: 42–47.
23.
DomingosYSFelipe RCT dosSFelipeRNB, et al.Evaluation of the environmental aging of the glass fiber-reinforced polymer composite when in contact with the effluent of a treatment plant. J Compos Mater2020; 54: 1385–1402.
24.
TjongSCLauKC. Tribological behaviour of SiC particle-reinforced copper matrix composites. Mater Lett2000; 43: 274.
25.
TuJPMengLLiuMS. Sliding friction and wear behavior of Cu–Fe composites prepared by powder metallurgy. Tribology1999; 19: 209–213.
26.
RigneyDAHirthJP. Plastic deformation and sliding friction of metals. Wear1979; 53: 345.
27.
ThiyagarajanVKalaichelvanKVijayR, et al.Influence of thermal conductivity and thermal stability on the fade and recovery characteristics of non-asbestos semi-metallic disc brake pad. J Brazilian Soc Mech Sci Eng2015; 38: 1207–1219.
28.
PengTYanQLiG, et al.The braking behaviors of Cu-based metallic brake pad for high-speed train under different initial braking speed. Tribol Lett2017; 65: 135.
29.
PeterJBHarryMMI. Characteristics of wear particles produced during friction tests of conventional and unconventional disc brake materials. Wear2003; 255: 1261–1269.
30.
SuLGaoFTaoH, et al.Correlations between third body evolution and tribological performance of copper-matrix friction material under abrasive paper interference conditions. J Eng Tribol2017; 232: 1–11.
31.
GarbarII. Gradation of oxidational wear of metals. Tribol Int2002; 35: 749.
32.
SoHYuDSChuangCY. Formation and wear mechanism of tribo-oxides and the regime of oxidational wear of steel. Wear2002; 253: 1004.
33.
QuinnTSullivanJRowsonM. Origins and development of oxidational wear at low ambient temperatures. Wear1984; 94: 175.
34.
AlemaniMGialanellaSStraffeliniG, et al.Dry sliding of a low steel friction material against cast iron at different loads: Characterization of the friction layer and wear debris. Wear2017; 376–377: 1450–1459.
35.
McneillLSEdwardsM. The importance of temperature in assessing iron pipe corrosion in water distribution systems. Environ Monit Assess2002; 77: 229.
36.
BlauPJ. Elevated-temperature tribology of metallic materials. Tribol Int2010; 43: 1203.
37.
VasconcellosM, et al.Mossbauer spectroscopy characterization of automotive brake disc and polymer matrix composite (PMC) pad surfaces. Wear2010; 268: 715–720.
