Final answer:
Pistons made from a composite material containing silicon carbide particles in an aluminum alloy matrix provide hardness, wear resistance, strength, and lightness.
The different properties of the two materials can pose challenges during production.
Step-by-step explanation:
Automotive engine pistons are most frequently made from aluminum alloys, usually with high silicon content to improve stiffness while reducing overall density, and may be cast or forged.
The silicon carbide particles provide hardness and wear resistance to the piston, while the aluminum alloy matrix provides strength and lightness. The combination of these materials in the composite allows for a piston that is both strong and durable.
However, the different properties of the two materials can also cause problems in producing the part. Silicon carbide is a hard material that is difficult to deform, while aluminum is a softer material that is easily deformable. This difference in properties can make it challenging to properly mold and shape the composite during production.