COMPOSITE MATERIAL HAVING INTERMEDIATE PHASE AND ITS PRODUCTION

摘要

PURPOSE: To rationally improve the strength and tenacity of a composite material by incorporating fibers relatively high in elastic modulus into a matrix relatively low in elastic modulus and arranging an intermediate phase lower than the matrix in elastic modulus and higher than the matrix in flocculation energy. CONSTITUTION: Fibers 10 comprising a fiber material having a predetermined diameter, apparent elastic modulus Ef, app and apparent flocculation energy Ef, app are added to a matrix 12 having apparent elastic modulus Em, app and apparent flocculation energy Um, app in an incorporated state. An intermediate phase 11 having predetermined thickness, apparent elastic modulus Ei, app and apparent flocculation energy Ui, app is allowed to be present at the position containing the fibers 10. At this time, the relation of Ei, appUm, app is set. By this constitution, the strength and tenacity of a composite material are rationally improved.