Effect of Distribution and Mechanical Properties of Aluminum Composite Reinforced with Nonmetallic Particles Fabricated by CGG Process

In producing metal matrix composites(MMCs) in the liquid metal process, how to add nonmetallic particles to the molten metal is important as well as how to mix the liquid/particles. In this study, composite gas generator(CGG) process which was developed as a new addition method of nonmetallic particles to the molten metal was used, more particularly, composite gas(inert gas + particles) is produced by feeding nonmetallic particles into a pressurized inert gas tank, in which upper rotor and lower fan are mounted, blowing and dispersing particles around the inside of pressure tank by rotating upper and lower blades. Composite gas with well dispersed particles was supplied into the molten metal of aluminum alloy by mechanical stirring impeller.Aluminum composite reinforced with nonmetallic particles were evaluated with mechanical properties and micro structures.