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

Abstract

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.

Review on the friction and wear of brake materials

“…45 In addition, more asperities will be deformed, shorn, and fractured to form friction films, which add the actual contact area and results in an increment of friction coefficient. 46 However, with a further increase in initial braking speed, the surface temperature may be high enough for the surface material to be thermally decomposed, which will then result in the rapid decrease in friction coefficient and an obvious increase in wear rate. The influence of temperature on the tribological properties of powder metallurgy friction materials is extremely different from that of organic friction materials.…”

Tribological characterization on friction brake in continuous braking

“…Saffar and Shojaei, (2012) discussed the influence of the composition of phenolic resins and rubber on the average friction coefficient and wear rate under different sliding speeds and temperatures. Fan et al (2008, 2011) discussed the influence of initial braking velocity on the average friction coefficient and analyzed the changing rules of surface micro-topography and the tribological properties of C/SiC composite friction material during braking. Kumar et al (2011) discussed the influence of metal filler on the distribution of the maximum surface temperature in braking.…”

Effect of different-condition parameters on frictional properties of non-asbestos phenolic resin-based friction material

“…14 The showing performances have a strong uncertainty. 15 The physical and chemical parameters [16][17][18][19] of the material are strongly coupled with the working conditions and the environmental medium during the friction process, such as the properties of the material itself 20 (chemical, physical, and mechanical), the experimental conditions [21][22][23][24][25] (contact pressure, sliding velocity, temperature, and medium environment), and the friction contact form. [26][27][28][29][30][31] The braking materials' test 32,33 mainly involves the large equipment braking including automobile, train, 34 airplane, and generator unit.…”