**5.1. Metal matrix nanocomposites**

Various processes are used to manufacture MMCs which are described here. These processes are classified on the basis of temperature of the metallic matrix during processing. Accordingly, the processes can be classified into five categories: (1) liquid-phase processes, (2) solid–liquid processes, (3) two- phase (solid–liquid) processes and (4) in situ processes. (5) deposition techniques [39-40].
