What is Al MMC?
Aluminium matrix composites (AMCs) are potential materials for various applications due to their good physical and mechanical properties.
Why Aluminium is used in MMC?
This process is much finer and typically Nano-sized. Aluminum MMCs give a customer the advantage of Aluminum’s lightweight characteristics and stability, and the enhanced wear resistance of ceramic.
What is Aluminium metal matrix composites?
Aluminium metal matrix composites (AlMMCs) are a class of materials that have proven successful in meeting most of the rigorous specifications in applications where light-weight, high stiffness and moderate strength are the requisite properties.
What is the reason of the increased strength in the MMC?
Al MMC strength enhancement is primarily related to the extremely low CTE of the SiC particles and how they strain the atomic lattice of the aluminum matrix, resulting in a dramatic increase in dislocation density.
How are MMC manufactured?
MMCs are made by dispersing a reinforcing material into a metal matrix. The reinforcement surface can be coated to prevent a chemical reaction with the matrix. To prevent this reaction, the carbon fibers are coated with nickel or titanium boride.
What is matrix in composite?
The matrix is basically a homogeneous and monolithic material in which a fiber system of a composite is embedded. It is completely continuous. The matrix provides a medium for binding and holding reinforcements together into a solid.
What is reinforcement in MMC?
The reinforcement and metallic matrix are required to be chemically distinct to call as metal matrix composite (MMC). The reinforcement particles are mechanically bonded to the metallic matrix in which they are embedded. If MMCs are produced using liquid metallurgy routes such as stir casting, squeeze casting etc.
What are cermets used for?
Cermets are used in the manufacture of resistors (especially potentiometers), capacitors, and other electronic components which may experience high temperature. Cermets are used instead of tungsten carbide in saws and other brazed tools due to their superior wear and corrosion properties.
What is the primary role of ceramic reinforcements?
The reinforcements used in ceramic matrix composites (CMC) serve to enhance the fracture toughness of the combined material system while still taking advantage of the inherent high strength and Young’s modulus of the ceramic matrix.