The document discusses metal matrix composites (MMCs), which can be reinforced with either continuous or discontinuous fibers, or particulates. Particulate-reinforced MMCs contain particles or platelets ranging from 0.5 to 100 micrometers in size, and allow for higher volume fractions than fiber-reinforced MMCs. Dispersion-strengthened MMCs contain nanoparticles that are uniformly distributed to strengthen the metal matrix.

1. Metal composite
Emhenolic or an epoxy. In the pitch infiltration
method, either an isotropic pitch or a mesophase pitch
is infiltrated into the dry carbon fiber preform at
10008C or higher and at pressure ranging from
atmospheric to 207 MPa (30,000 psi). At this
temperature, carbonization occurpty

2. history
• The history of development of metal, ceramic,
and carbon matrix composites is much more
recent than that of the polymer matrix
composites. Initial research on the metal and
ceramic matrix composites was based on
continuous carbon or boron fibers

3. METAL MATRIX COMPOSITES
• Fiber-reinforced MMC containing either continuous or
discontinuous fiber reinforcements; the latter are in
the form of whiskers with approximately 0.10.5 mm in
diameter and have a length-to-diameter ratio up to
200. 2.
• Particulate-reinforced MMC containing either particles
or platelets that range in size from 0.5 to 100 mm. The
particulates can be incorporated into the metal matrix
to higher volume fractions than the whiskers. 3.
Dispersion-strengthened MMC containing particles
that are

4. MMC
• Particulate-reinforced MMC containing either
particles or platelets that range in size from
0.5 to 100 mm. The particulates can be
incorporated into the metal matrix to higher
volume fractions than the whiskers. 3.
Dispersion-strengthened MMC containing
particles that are