Tailoring Fiber/Matrix Interfaces Through Kirkendall Defects

In a proposed method of tailoring some of the mechanical properties of metal-matrix, oxide-matrix, and ceramic-matrix composite materials, Kirkendall defects (microscopic pores as described below) would be introduced into thin interfacial layers between the fibers and the matrices. This method could be used in addition or as an alternative to an older method in which one seeks to tailor the mechanical properties of a composite by coating its fibers one or more layer(s) of material(s) distinct from the matrix and fiber materials.