Development of C/C–SiC Brake Pads for High‐Performance Elevators

El-Hija, Hussam Abu; Krenkel, Walter; Hugel, Stefan

doi:10.1111/j.1744-7402.2005.02012.x

Cited by 68 publications

(18 citation statements)

References 7 publications

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“…Using such a wide operational temperature range, combined with the excellent mechanical properties, C/C-SiC disks have opened up possibilities for their applications in high-speed and heavy-duty brake systems. 14,15 Investigations by the Ceramic Composite Aircraft Brake Consortium of USA indicated that C/C-SiC materials may be feasible as a next-generation aircraft brake material. 16 Nowadays, plenty of works have been performed for developing C/C-SiC aircraft brake disks.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Dynamometer Tests of 3D Needle‐Punched C/C‐SiC Composites for High‐Speed and Heavy‐Duty Brake Systems

Xiao

Zhang

et al. 2016

Int J Applied Ceramic Tech

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Three-dimensional (3D) needle-punched C/C-SiC brake composites were fabricated by chemical vapor infiltration combined with liquid silicon infiltration. The microstructures, properties, and dynamometer tests for different high-speed and heavyduty brake systems had been investigated. The results indicated that the value of flexural strength and compressive strength can reach 182 Mpa and 234 MPa, respectively. Their thermal conductivity remained between 15-21 W/m/K between room temperature and 1100°C. The dynamometer test of 3D needle-punched C/C-SiC brake disk and pads for high-speed trains, according to the procedure of International Union of Railways, showed that the coefficient of friction (l) was about 0.32 and not sensitive to the brake speeds. After four times of emergency stops, the linear wear rate of the C/C-SiC pads was 0.481 cm 3 /MJ. The C/ C-SiC brake pairs of vehicle were tested with inertia dynamometer according to SAE's J2522 testing procedure, and the characteristic values of the C/C-SiC brakes indicated that the hot fade was almost 0. The C/C-SiC pads were matched with C45 steel disk and tested for engineering machineries brake system, and the wear rate of C/C-SiC pads was 4.2 lm/cycle and less than one-sixth of that of the traditional powder metallurgy brake pad. The 3D needle-punched C/C-SiC brake composites have been demonstrated to be the top choice for advanced friction materials of high-speed and heavy-duty brake systems.

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Section: Introductionmentioning

confidence: 99%

Preparation and Dynamometer Tests of 3D Needle‐Punched C/C‐SiC Composites for High‐Speed and Heavy‐Duty Brake Systems

Xiao

Zhang

et al. 2016

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

show abstract

“…For high braking performance, C/SiC brake materials are potential candidates for high-speed trains, automobiles, aircraft, and emergency brakes for elevators and cranes (Vaidyaraman,et al (3); Krenkel and Berndt (10); El-Hija, et al (13)). As a new brake material, C/SiC and conventional brake materials are generally paired in application.…”

Section: Introductionmentioning

confidence: 99%

Effect of Braking Speed on Frictional Properties of Short Fiber C/C-SiC Brake Materials and Grey Cast Iron

Fan

Deng

et al. 2013

Tribology Transactions

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Short fiber C/C-SiC brake materials were prepared by dipping the fibers in resin, chopping, warm pressing, and pyrolyzing, followed by a liquid silicon infiltration process. The effect of braking speed (initial braking speed) on the frictional properties of a pair of short fiber C/C-SiC brake materials and grey cast iron (HT250) (C/C-SiC-HT250) was investigated. The results indicated that the average friction coefficient of the C/CSiC-HT250 increased to the maximum value at 10 m/s and then decreased with an increase in braking speed. The wear rate of the C/C-SiC increased with increasing braking speed when it was lower than 10 m/s and decreased when it was higher than 10 m/s. The wear was the result of the brittle fracture of asperities when the braking speed was lower than 10 m/s and induced granular debris. The wear for the tough cutting by C/C-SiC asperities or hard phase when the braking speed was higher than 10 m/s and resulted in ribbon debris. When the braking speed was higher than 20 m/s, the texture of the friction surface of the HT250 changed, which would affect the tribological properties.

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“…For high braking performance, the C/SiC brake materials are potential candidates for high speed trains, automobiles, aircraft, and emergency brakes for elevators and cranes [1,8,11]. However, the materials of the braking mate are different for different applications.…”

Section: Introductionmentioning

confidence: 99%

Tribological Properties of Short Fiber C/SiC Brake Materials and 30CrSiMoVA Mate

Fan

Zhang

et al. 2011

Tribol Lett

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In this study, the short fiber C/SiC brake materials were prepared by a combined process of the fibers dipped with resin, chopping, warm pressing, pyrolyzing, and the liquid silicon infiltration process. The tribological properties of short fiber C/SiC brake materials and 30CrSiMoVA mate were investigated. The results indicated that the average friction coefficient decreased with the increase of braking speed (initial braking speed), and the friction coefficient tended to be constant when the braking speed was higher than 20 m/s. The braking was stable when the braking speed was 5 m/s, and the braking was unstable when the braking speed was higher than 10 m/s. The wear rate of the C/SiC increased with the increase of braking speed when the braking speed was less than 10 m/s, decreased with the increase of braking speed when the braking speed was less than 20 m/s, and then increased afterward with the increase of braking speed. When the braking speed was higher than 20 m/s, an oxidation-abrasion mechanism could occur. With braking speed increasing, the number of the ribbon debris increased, and the ribbon debris got long and thick, and the number of big granular debris increased.

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Development of C/C–SiC Brake Pads for High‐Performance Elevators

Cited by 68 publications

References 7 publications

Preparation and Dynamometer Tests of 3D Needle‐Punched C/C‐SiC Composites for High‐Speed and Heavy‐Duty Brake Systems

Preparation and Dynamometer Tests of 3D Needle‐Punched C/C‐SiC Composites for High‐Speed and Heavy‐Duty Brake Systems

Effect of Braking Speed on Frictional Properties of Short Fiber C/C-SiC Brake Materials and Grey Cast Iron

Tribological Properties of Short Fiber C/SiC Brake Materials and 30CrSiMoVA Mate

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