Friction and surface fracture of a silicon carbide ceramic brake disc tested against a steel pad

Bian, Guangyu; Wu, Houzheng

doi:10.1016/j.jeurceramsoc.2015.07.009

Cited by 22 publications

(9 citation statements)

References 24 publications

(32 reference statements)

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“…As the vertical force increases this difference reduces and, at 600N, the friction coefficient for fine and coarse samples is similar and approximately equal to 0.58. This result is similar to the results obtained by Bian and Wu (2015), for a clutch friction test on Silica Carbide (SiC), the same material used in the manufacture of this sandpaper. Their results show a variation from approximately 1 to around 0.58 to 0.62 after a large number of cycles.…”

Section: Effect Of Cyclic Shearingsupporting

confidence: 88%

Effect of cyclic shearing on contact surfaces of geo-materials under constant normal force

2021

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A large amount of research has been done on conforming surfaces in rock joints as well as on the contact between individual grains, however, not much exist in nonconforming contact surfaces subjected to friction, such as flat contacts between ballast particles, stone columns or riprap; applications that involve the use of coarse gravel subjected to low vertical stresses. Therefore, this article aims to study changes in contact properties between non-conforming flat contacts between large geomaterial particles that have been subjected to cyclic shearing under a constant low vertical force, using a direct shear apparatus. Two different silica carbide sandpapers that do not loose particles were used, to simulate different morphologies, a nominally fine and a coarse surface texture. The results show a passivation of the shear strength where a constant value of friction coefficient is reached after around 15 to 17 cycles for all tests, except the tests at the lowest vertical force. For the tests at the highest vertical force similar friction coefficients were determined for the coarse and fine surfaces. The mass broken during the 10 th and 20 th cycles was collected at the end of the tests and seem to show a linear relationship with the vertical force used in the test. Particle analysis, determined via microscopy, show that the grading is dependent on the initial topography of the surfaces. Despite being subjected to 10 and 20 cycles of shearing, the broken particles look similar in shape with sharp, jagged edges and having different shapes and roundness values with a large variation, indicating that the breakage was not enough to fill in the space between the particles.

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Section: Effect Of Cyclic Shearingsupporting

confidence: 88%

Effect of cyclic shearing on contact surfaces of geo-materials under constant normal force

2021

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“…67,68 Also, carbon materials, that is carbon fibre reinforced silicon carbide (SiC) composites (C/SiC and C/C–SiC), are often used today, and they are increasingly used by the largest vehicle manufacturers, but also on an aircraft. 69 Thus, according to Bian and Wu, 70 a ceramic brake disc made of SiC with metal brake pads showed good tribological characteristics in application. Carbon-based friction materials are interesting for use in brake friction materials due to their attractive thermal properties together with tribological properties.…”

Section: Applied Materials In Brake Friction Pairsmentioning

confidence: 97%

The analysis of the influential parameters that cause particles formation during the braking process: A review

Vasiljević

Glišović

Stojаnović

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part J:

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The braking system is one of the important systems from the aspect of vehicle safety, but it is also one of the systems that has a significant impact on the environment. Brakes are considered to be a source of non-exhaust particles, that is sources that create particles by the wear of the elements that are in contact with each other, and in this case, the brake friction elements (brake pads and rotating disc). Such particles often contain heavy metals that are part of the friction elements. There are a number of influencing factors that can affect the wear of the friction elements and increase the concentration of the formed particles. Laboratory methods of testing wear and particle formation, road tests and various simulations of brake wear are most often used for testing. In this paper, a review of methodologies for testing the formation of particles from the braking system, the materials used in the composition of the friction elements of the brake, as well as factors affecting the wear rate and concentration of particles of different sizes, based on the conclusions of other authors is presented. Based on this review, it can be concluded which quantities and factors need special attention during further research in the mechanism of formation of non-exhaust particles whose source is the vehicle braking system.

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“…This surface fracture was further evidenced in a SiC ceramic disc when it was tested against a mild steel pad on a laboratory-scale dynamometer. 31 Therefore, surface fracture should be the primary reason that why not all SiC regions are shown on the friction surface. Later in this section , 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 …”

Section: Overviewmentioning

confidence: 99%

Friction surface structure of a Cf/C–SiC composite brake disc after bedding testing on a full-scale dynamometer

Bian

2016

Tribology International

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Citation: BIAN, G. and WU, H., 2016. Friction surface structure of a Cf/CSiC composite brake disc after bedding testing on a full-scale dynamometer. AbstractWe have examined friction surface structure of a carbon ceramic brake disc tested on a full-scale dynamometer with microscopy techniques. The bedded friction surface is composed of two types of regions: transferred materials (TM) and SiC. The TM regions were formed through the deposition of wear debris into surface voids, followed by compaction and crystallite refinement during braking. A thin friction layer (FL) was developed on top of TM and SiC regions with nano-sized copper/iron oxide crystallites as the primary constituent.Analysis shows that debris generated from pad is the main source of TM and FL. No evidence shows chemical diffusion bonding between TM and composite constituent. On silicon carbide surface, dislocations were activated as the sources of surface fracture.

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Friction and surface fracture of a silicon carbide ceramic brake disc tested against a steel pad

Cited by 22 publications

References 24 publications

Effect of cyclic shearing on contact surfaces of geo-materials under constant normal force

Effect of cyclic shearing on contact surfaces of geo-materials under constant normal force

The analysis of the influential parameters that cause particles formation during the braking process: A review

Friction surface structure of a Cf/C–SiC composite brake disc after bedding testing on a full-scale dynamometer

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