Metal Matrix Composite Interface Control With Alumina Nanoparticles

"Metal matrix composites represent an increasingly important class of materials for high performance applications. The fracture resistance and high tensile strength properties of metal matrix composites are directly related to the mechanical and chemicalbonding between the reinforcing material and metal matrix. This project will focus on controlling the interfacial interactions between the matrix and reinforcing phase of a metal matrix composite. Specifically, the interface between an aluminum metalmatrix and silicon carbide fibers and whiskers will be tailored through controlled electrostatic deposition of alumina nanoparticles onto the silicon carbide. The ability to control the properties of the interface will lead to improved composites. The technology to be developed under this program will be a process for producing lightweight, reinforced aluminum metal matrix composites. The performance of these materials will be optimized by tailoring the interface between whiskers or fibers andmatrix material with alumina nanoparticles. These materials will find applications in space, military, and commercial vehicle and building materials."