Microstructure and tribological characteristics of needled C/C–SiC brake composites fabricated by simultaneous infiltration of molten Si and Cu

Microstructures and tribological behaviors of Cf/C‐SiC composites tailored by Cu and Fe‐Si matrices

“…[16][17][18][19][20] To tailor the frictional characteristics of C f /C-SiC composites, matrix modification is considered as a practical solution. [20][21][22][23][24][25][26][27][28][29][30] The matrix used for modification generally includes alloy and non-metal. As alloys introduced, friction and wear properties of C f /C-SiC, as a consequence, will be changed.…”

“…19,[21][22][23][24][25] In addition, copper-alloy as matrix seems to be beneficial to enhance the stability of COF and the wear resistance of C f /C-SiC composites. 20,26,28,29 However, the low COF of the copper-alloy modified composites at high speed braking is still unsolved. By introducing non-metals as matrices can also optimize the friction and wear properties of C f /C-SiC composites.…”

“…To tailor the frictional characteristics of C f /C‐SiC composites, matrix modification is considered as a practical solution 20‐30 . The matrix used for modification generally includes alloy and non‐metal.…”

“…For instance, the wear rate of C f /C‐SiC composites was effectively reduced by introducing Fe‐Si alloy into the matrix, but low stability of COF under high‐speed braking condition remained 19,21‐25 . In addition, copper‐alloy as matrix seems to be beneficial to enhance the stability of COF and the wear resistance of C f /C‐SiC composites 20,26,28,29 . However, the low COF of the copper‐alloy modified composites at high speed braking is still unsolved.…”

Fabrication of C/C‐SiC composites using high‐char‐yield resin

“…Thirdly, many additives can be added into the matrix, such as ZrC, 5 BN, 4 diamond, 6 carbon black, 16 carbon black mixed with silicon, 17 and graphite 6 . Also, although silicon powders are most commonly used for the infiltration process, silicon mixed with Al powders, 10,18 polymer‐Si slurry, 19 Si‐Zr alloy, 20 Si‐Cu alloy, 21 or Si‐Fe alloy 15 was used to make C/C‐SiC composites. These changes enriched the fabrication process of C/C‐SiC composites, and most of them aimed to increase the mechanical properties of the C/C‐SiC composites or decrease the cost of the fabrication process.…”