Process Development for the Ceramic Injection Molding of Oxide Short Fiber Reinforced CMCs
In this study,we developed a recipe by looking into the effects of surfactant and filling degree,and the process chain for ceramic injection molding of alumina short fiber reinforced oxide ceramic matrix composite.Following that we investigated the effects of feedstock preparations,formulations and processing parameters on the sintered density & porosity.The results demonstrate the porosity varies through increase in fiber content and sintering temperature,in which the fiber orientation plays a significant role to define uniaxial shrinkage behavior.While the temperature was increasing the density,the increasing fiber content caused a drop of the relative densities from lower fiber content to higher fiber content at the same sintering temperature.The reason is that the fiber cannot be oriented completely and multiplying the amount of fibers increases unequal shrinkage in all directions,because the fibers cannot follow the shrinkage path of the matrix and cause higher porosities or gaps bigger than pores which can lead the crack propagation easier and hinder to potential of ductilization of the CMC.
Tülümen Metin Hanemann Thomas Piotter Volker
Karlsruhe Institute of Technology,Institute of Applied Materials(IAM-WK)D-76344 Eggenstein-Leopolds Karlsruhe Institute of Technology,Institute of Applied Materials(IAM-WK)D-76344 Eggenstein-Leopolds
国际会议
北京
英文
725-731
2018-09-16（万方平台首次上网日期，不代表论文的发表时间）