Chemical and microstructural changes induced by friction and wear of brakes

Österle, Werner; Griepentrog, Michael; Groß, Th.; Urban, I.

doi:10.1016/s0043-1648(01)00785-2

Cited by 206 publications

(98 citation statements)

References 9 publications

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“…The macroscopic wear behaviour of disc brakes is explained by the mesoscopic contact situation between the pad and disc [21], [22]. Metal fibres in the pad form stable primary plateaus that carry the main part of the load.…”

Section: Discussionmentioning

confidence: 99%

Contact Pressure and Sliding Velocity Maps of the Friction, Wear and Emission from a Low-Metallic/Cast-Iron Disc Brake Contact Pair

et al. 2017

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Section: Discussionmentioning

confidence: 99%

Contact Pressure and Sliding Velocity Maps of the Friction, Wear and Emission from a Low-Metallic/Cast-Iron Disc Brake Contact Pair

et al. 2017

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“…In general it has been argued that due to plowing of the third body CoF increases for a system but it can also decrease if some particles roll and serve as rolling bearings [47]. A third body can consist of all the elements of the friction material and the disc and may also contain their oxides [43,59,38]. Furthermore chemical composition strongly depends on the loading conditions during most recent brake applications [60,43].…”

Section: Tribological Interfacementioning

confidence: 99%

“…In many studies [70,67,59,69,42,73,52,74] CoF was found to be dependent on braking force and velocity. In most of these studies CoF shows decreasing trend with increasing velocity while it shows mixed trend with increasing load.…”

Section: Cof Dependence On Temperature Force and Velocitymentioning

confidence: 99%

Overview of disc brakes and related phenomena - a review

Rashid

2014

IJVNV

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Disc brakes have evolved over time to be a reliable method of decelerating and stopping a vehicle. There have been different designs of disc brake systems for different applications. This review gives a detailed description of different geometries of the components and the materials used in a disc brake system. In spite of all the improvements, there are still many operational issues related to disc brakes that need to be understood in a greater detail and resolved. There has been a lot of research going on about these issues and at the same time different methods are being proposed to eliminate or reduce them. There has also been an intensive fundamental research going on about the evolution of tribological interface of disc-pad system. One major purpose of the present paper is to give a comprehensive overview of all such developments.

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“…PM in vehicle exhaust is dominated by particles < 10 μm, i.e., PM 10 (Kim et al, 2001). In addition to direct combustion derived particles in urban environments vehicles produce other magnetic PM via abrasion/corrosion in particular brake wear (Olson and Skogerboe, 1975;Österle et al, 2001), which also contains particles < 10 μm (McCrone and Delly, 1973;Gillies and Gertler, 2000).…”

Section: Introductionmentioning

confidence: 99%

Magnetic signature of daily sampled urban atmospheric particles

Muxworthy

Matzka

Dávila

et al. 2003

Atmospheric Environment

103

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The magnetic signature of two sets of daily-sampled particulate matter (PM) collected in Munich, Germany, were examined and compared to variations in other pollution data and meteorological data using principal component analysis. The magnetic signature arising from the magnetic minerals in the PM, was examined using a fast and highly sensitive magnetic remanence measurement. The longest data set studied was 160 days, significantly longer than that of similar magnetic PM studies improving the statistical robustness. It was found that the variations in the mass dependent magnetic parameters displayed a complicated relationship governed by both the meteorological conditions and the PM loading rate, whereas mineralogy/grain-size dependent magnetic parameters displayed little variation. A six-fold increase in the number of vehicles passing the sampling locations only doubled the magnetic remanence of the samples, suggesting that the measured magnetic signature is in addition strongly influenced by dispersion rates. At both localities the saturation isothermal remanent magnetisation (SIRM) was found to be strongly correlated with the PM mass, and it is suggested that measuring SIRM as a proxy for PM monitoring is a viable alternative to magnetic susceptibility when the samples are magnetically too weak. The signal was found to be dominated by magnetite-like grains less than 100 nm in diameter which is thought to be derived primarily from vehicles. Such small grains are known to be particularly dangerous to humans. There was also evidence to suggest from magnetic stability parameters that the magnetite-like grains were covered with an oxidised rim. The concentration of magnetic particulate matter was in the range of 0.3-0.5% by mass.

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Chemical and microstructural changes induced by friction and wear of brakes

Cited by 206 publications

References 9 publications

Contact Pressure and Sliding Velocity Maps of the Friction, Wear and Emission from a Low-Metallic/Cast-Iron Disc Brake Contact Pair

Contact Pressure and Sliding Velocity Maps of the Friction, Wear and Emission from a Low-Metallic/Cast-Iron Disc Brake Contact Pair

Overview of disc brakes and related phenomena - a review

Magnetic signature of daily sampled urban atmospheric particles

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