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Metal Matrix Composites (MMC) - Structural Composite Components

Light weight, high stiffness, high compression strength, good damping, particle reinforced, pressure infiltration

CPS Technologies’ unique processes can make Net-Shape, structural, metal matrix composite (MMC) parts with either silicon-carbide (SiC) particles or continuous ceramic fibers as the reinforcement. SiC particle reinforced aluminum (AlSiC) has the stiffness of cast iron and the weight of aluminum, and continuous fiber reinforced aluminum has the strength and stiffness of high strength steel at less than half the weight.

Applications range from pushrods for racing engines to attach plates for high speed robots. If your application has demanding requirements for high stiffness or strength, at minimum weight, you should consider MMC. It can be precision cast to near net shape, and can include threaded inserts of aluminum, steel or titanium, for attachments.

Metal Matrix Composites
Metal Matrix Composites are Ideal for Components that Require Stiffness, Strength and Light Weight


MMC Structural Composite Data Sheet

Discontinuously Reinforced Metal Matrix

Aluminum, Reinforced with Particles of SiC is a Lightweight,
High Stiffness, High Thermal Conductivitiy, 
Discontinuously Reinforced Metal Matrix

Metal Matrix Composite

Aluminum, Reinforced with Continuous Ceramic
Fibers, is a High Stiffness, High Strength,
Metal Matrix Composite


Table 1 - Examples of Mechanical Properties for Two Typical Components

  Typical Particle Reinforced Aluminum Typical Fiber Reinforced Aluminum
FTU 0.3 GPa (45 ksi) 1.2 -1.5 GPa (180-220 ksi)
FCU 0.3 GPa (45 ksi) 1.7 -3.4 GPa (250-500 ksi)
E 170 GPa (26 msi) 240 GPa (35 msi)

CPS TECHNOLOGIES CASTING PROCESS PRODUCES NEAR NET-SHAPE COMPONENTS

The process for producing either discontinuous, particle reinforced or continuous fiber reinforced part starts with a preform that has the shape of the final part. The preform is then infiltrated with aluminum to produce a metal matrix composite component. This process is similar to the polymer composite process called resin transfer molding, except the preform is infiltrated with molten aluminum rather than resin.

   

EXAMPLES OF METAL MATRIX COMPOSITE PARTS

CPS Technologies has been the leading producer of metal matrix composites for thermal management of electronics for over twenty years and has produced millions of LIDS, IGBT’s and other specialized components which combine our unique Quickset™ performing capability (Silicon-Carbide particulate performs) with our casting processes. We have now expanded that capability by demonstrating components for mechanical, structural and armor applications. Shown below are a few examples. Our current equipment capabilities allow us to process parts that will fit in an envelope of 17 x 32 inches (80 x 40 cm).

 

This Silicon-Carbide Particle Reinforced Aluminum (AlSiC) Fin Pin Baseplate Shows the Precision Casting Capability of CPS Technologies’ Metal Matrix Composite Processes

 

An End Effector Arm for a High Speed Robot has Been Demonstrated in Both Discontinuous and Continuous Reinforcement

CPS Technologies (CPS) has developed a technology for improving the toughness of ceramic tiles in composite armor systems by selectively reinforcing them with metal and metal matrix composites (MMC) and then packaging them in a hermetic layer of high-pressure cast aluminum. We believe that armor integrators can translate this improvement into more consistent ballistic performance, reduced need for gap-fillers, and improved ballistic performance near tile edges.
 
Monolithic Ceramic Tiles Shatter When Struck with a Projectile
 
Encapsulated, HybridTech Armor® Tiles Limit the Damage from Projectile Impact

For more information, please contact:

Jim Sorensen /x260
Manager of Business and Technical Development - Structural Composites