Design of high performance CMC brake discs

被引：51

作者：

Krenkel, W ^{[1
]}

Henke, T ^{[1
]}

机构：

[1] DLR, German Aerosp Ctr, D-70569 Stuttgart, Germany

来源：

HIGH TEMPERATURE CERAMIC MATRIX COMPOSITES III | 1999年 / 164-1卷

关键词：

ceramic matrix composites; brake disc; C/C-SiC; thermal analysis;

D O I：

10.4028/www.scientific.net/KEM.164-165.421

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Ceramic matrix composite (CMC) materials based on 2D-carbon fibre preforms show high heat-absorption capacities and good tribological as well as thermomechanical properties. To take advantage of the full lightweight potential of these new materials in high performance automotive brake discs, the thermal conductivity transverse to the friction surface has to be high in order to reduce the surface temperature. Experimental tests showed, that lower surface temperatures pi event overheating of the brake's periphery and stabilizes the friction behaviour. In this study different design approaches with improved transverse heat conductivity have been investigated by finite element analysis. C/C-SiC bolts as well as SiC coatings and combinations of them have been investigated and compared with an orthotropic brake disc, showing a reduction of temperature of up to 50 %. Original sized brake discs with C/C-SiC have been manufactured and tested under real conditions which verified the calculations. Using only low-cost CMC materials and avoiding any additional processing steps, the potential of C/C-SiC brake discs are very attractive under tribological as well as under economical aspects.

引用

页码：421 / 424

页数：4