Why composites? Composites enable a unique combination of properties The property can be made to vary continuously over a range. Composites can sometimes attain a value of a given physical property not attainable by either of the two components alone
Why composites? • Composites enable a unique combination of properties • The property can be made to vary continuously over a range. • Composites can sometimes attain a value of a given physical property not attainable by either of the two components alone
PSZ ZrO, Mullite SiO,(q)ice AlO, Si AIN SiC (C)BN Diamond T0, RBSC BeO C fibre CERAMICS SiO2 GLASS Pyrex (B/si/O) p-imide CORK p-ester POLYMERS epoxy. MICROTHERM FIREBRICK Cu/p-imide BALSA glass CFRP(L) CFRP(II) SiC/BeO CFRP(I) epoxy epoxy epoxy COMPOSITES STILL AIR TI Li Fe Na Cu Pb Ni Au Ag METALS THERMAL CONDUCTIVITY (Close to R.T.) 102 10 (WmK 10 100 1000 Thermal conductivity at room temperature of a variety of materials
Thermal conductivity at room temperature of a variety of materials
Why composites? Composites enable a unique combination of properties The property can be made to vary continuously over a range. Composites can sometimes attain a value of a given physical property not attainable by either of the two components alone
Why composites? • Composites enable a unique combination of properties • The property can be made to vary continuously over a range. • Composites can sometimes attain a value of a given physical property not attainable by either of the two components alone
Other reasons... ·Economic 。Environmenta
Other reasons... • Environmental • Economic
Other reasons... ·Economic Do more with less. ·Environmenta
Other reasons... • Economic Do more with less. • Environmental