Advanced Composites
What other factors contribute to the mechanical performance of composite?

Fiber-matrix interface determines how well the matrix transfers the load to the fibers and is a function of the bond between them. This bond may be mechanical, chemical, or reactive.

Frequently, processes are employed to increase the strength of the bond between the fiber and the matrix. Fibers may be naturally rough or etched to improve the mechanical bond. Coupling agents may be applied to increase adhesion to the matrix. If the matrix has a higher thermal expansion than the fiber and the composite is processed at an elevated temperature, the matrix will shrink radially around the fiber and exert compressive force on the fiber, improving the mechanical bond.

In reaction bonding, atoms or molecules from the fiber and matrix diffuse into one another at the interface.

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