metallicmatrix

Metallicmatrix is a term used to describe the metallic matrix in metal matrix composites (MMCs). In MMCs, a metallic phase forms the continuous matrix that binds reinforcing materials such as ceramic particles or fibers, transferring load and distributing stresses.

Common metallic matrices include aluminum, magnesium, titanium, copper, and nickel alloys. Reinforcements may be ceramic particles (e.g., silicon carbide, aluminum oxide) or continuous fibers (e.g., carbon, silicon carbide fibers).

Manufacturing techniques include stir casting, powder metallurgy, squeeze casting, and in-situ methods that grow reinforcements within the matrix.

MMC with metallic matrices typically exhibit improved stiffness, strength, wear resistance, and often higher temperature capability, at the cost of higher density and processing complexity. Properties are anisotropic when fiber-reinforced and depend on the matrix-reinforcement interface.

Applications span aerospace, automotive, sports equipment, and thermal management, where weight reduction and performance are critical.

Research on MMCs dates to the mid-20th century; metallicmatrix is not a formal designation but a descriptive term used in some literature and databases to denote the matrix phase.

Key challenges include cost, machinability, adhesion at the matrix-reinforcement interface, residual stresses, and recycling concerns.