共晶界面相, 纤维夹杂, 棒状共晶体, 四相模型

First, four-phase-model method was used to determine the equivalent stress field and recessive expression for flexibility increment tensor of eutectic ceramic rod. Then, an analytical solution for elastic constants of eutectic ceramic rod was gotten by using Taylor series expansion. The eutectic ceramic rod was transverse isotropy and has five independent elastic constants. Finally, assuming the eutectic ceramic rod and matrix particle as transverse isotropy inclusion and isotropy inclusion respectively, the stiffness of eutectic composite ceramics with eutectic interphase was predicted. The results show that the elastic modulus and Poisson’s ratio of eutectic composite ceramics with eutectic interphase are dependent on the diameter of fibers.