A low to near-zero metal matrix composite material featuring high modulus carbon fibers reinforcing a lightweight metal or semimetal. The fibers have a negative coefficient of thermal expansion in the axial direction. Laminates featuring parallel arrays of fibers may be cross-plied to produce quasi-isotropic...http://www.google.com.tw/patents/US6355340?utm_source=gb-gplus-share專利 US6355340 - Low expansion metal matrix composites
