Composites Flashcards
Define a composite
A combination of two or more chemically distinct and insoluble phases with a recognisable interface where the properties are superior to the parent materials
What is the job of the matrix?
Hold the fillers together
Transfers stress to thee filler phase
Protects filler from environment
What is the job of the filler?
Carries the load
Enhances properties
In a metal matrix composite (MMC) what properties does the filler enhance?
Yield stress
Tensile strength
Creep resistance
In a ceramic matrix composite (CMC) what properties does the filler enhance?
Fracture toughness
In a plastic matrix composite (PMC) what properties does the filler enhance?
Young’s modulus
Yield stress
Tensile strength
Creep resistance
What are the three classifications of composite materials.
Particle filled
Fibre reinforced
Structural
What are the three sub classifications of a fibre reinforced composite?
Discontinuous (short)
Continuous Unidirectional
Woven (fabric)
What are the three sub classifications of a structural composite?
Laminates
Sandwich panels
Hybrid laminate
Give three examples of a particle reinforced composite
Spherodite steel: matrix=ferrite(a) particles=Cementite (Fe3C).
WC/Co cemented carbide: matrix=cobalt particles=WC
Automobile tire rubber: matrix=rubber particles=carbon
