w.Krenkel, F Berndt Materials Science and Engineering A 412(2005)177-181 0.7 D C/C-SiC disk 80 v=23.7ms 言04a=068ms2 03 EE市 iron 0.0 Fig 1. Influence of the pad material on the frictional behaviour of 2D reinforced Fig. 2. Wear rates of C/C-SiC brake disks in combination with commercial C/C-SiC brake disks ining materials(materials composition see Fig. 1). was adapted with six pistons and the brake pads include an insu- and several companies are currently producing C/C-SiC brake lating ceramic back side to prevent the metallic and polymer disks and pads under series conditions brake parts from the high temperature. Additionally, Porsche The Porsche company offers internally ventilated ceramic offers a highly wear resistant dual disk clutch for the Carrera composite brakes(Fig 3)for different car models with a diam- GT model(Fig 3). The clutch plate is made of titanium with eter of 350 mm gaining weight savings of about 50% compared a lining of C/C-SiC, transmitting a maximum torque of more with conventional brake systems. The ceramic brake disk is than 1000 Nm. The small clutch diameter of 169mm leads to ounted on a metallic hub and can resist a maximum applica- a lower gearbox mounting and the reduced mass improves the ion temperature of about 800oC. The aluminium brake calliper motor dynamic Fig. 3. Left: Porsche ceramic composite brake(PCCB); right: Porsche ceramic clutch PCCC (left), in comparison with the conventional clutch 21] Energy per brake of different transportation systems Transportation system Train Aircraft Automotive Elevator(emergency) Crane(emergency) CE I Boeing 777 Porsche GT2 Schindler 700 Mayr roba-stop Max speed (m/s 88.9 Mass[103H Deceleration [m/ Brake energy [M] 1850 1.7 No of brake di Energy per brake disk [M] 5b/ 1.7 a 75% of brake c Emergency180 W. Krenkel, F. Berndt / Materials Science and Engineering A 412 (2005) 177–181 Fig. 1. Influence of the pad material on the frictional behaviour of 2D reinforced C/C–SiC brake disks. and several companies are currently producing C/C–SiC brake disks and pads under series conditions. The Porsche company offers internally ventilated ceramic composite brakes (Fig. 3) for different car models with a diam￾eter of 350 mm gaining weight savings of about 50% compared with conventional brake systems. The ceramic brake disk is mounted on a metallic hub and can resist a maximum applica￾tion temperature of about 800 ◦C. The aluminium brake calliper Fig. 2. Wear rates of C/C–SiC brake disks in combination with commercial lining materials (material’s composition see Fig. 1). was adapted with six pistons and the brake pads include an insu￾lating ceramic back side to prevent the metallic and polymer brake parts from the high temperature. Additionally, Porsche offers a highly wear resistant dual disk clutch for the Carrera GT model (Fig. 3). The clutch plate is made of titanium with a lining of C/C–SiC, transmitting a maximum torque of more than 1000 Nm. The small clutch diameter of 169 mm leads to a lower gearbox mounting and the reduced mass improves the motor dynamic. Fig. 3. Left: Porsche ceramic composite brake (PCCB); right: Porsche ceramic clutch PCCC (left), in comparison with the conventional clutch [21]. Table 3 Energy per brake of different transportation systems Transportation system Train Aircraft Automotive Elevator (emergency) Crane (emergency) ICE 1 Boeing 777 Porsche GT2 Schindler 700 Mayr roba-stop Max. speed [m/s] 91.7 72.2 88.9 13.8 30 Mass [103 kg] 440 208 1.7 18 3.1 Deceleration [m/s2] 1.3 2.4 14.5 Brake energy [MJ] 1850 542 6.7 1.7 1.4 No. of brake disks 192 48 4 8 1 Energy per brake disk [MJ] 7.2a 4.5b/20c 1.7 0.21 1.4 a 75% of brake energy. b 40% of brake energy. c Emergency (RTO)