COMPOSITE MATERIALS OF CONTROLLED THERMALEXPANSION

摘要

Properly designed composite materials can produce thermal expansion coefficientslying well outside the range shown by homogeneous materials both in a single direction and in aplane. Much lower negative values may be produced compared with homogeneous materials as wellas larger positive values. Such extreme values may be coupled with a choice of other mechanicalproperties, e.g. Young’s modulus or breaking strength or toughness. In this paper we demonstratehow to obtain large negative values of the expansivity.