Graphite as reinforcement phase in metal matrix composite ( MMC)
Graphite as
reinforcement phase in MMC
- Graphite is an allotrope of
carbon which is a most stable form of carbon under standard
condition.
- Graphite can be found in a
flake form of graphite which has crystalline structure and has honeycomb
hexagonal structure when edges are unbroken. Sometimes very fine flake of
graphite is called amorphous.
- Generally, the thermal
properties of graphite are anisotropy in nature.
- Graphite has several layers and
the individual layer of graphite is called graphene sheet and each
graphene sheets are joined together by weak van der Waals by virtue of
which low friction is created between adjacent graphene sheets this
determine self- lubricating properties of graphite.
- Each layer of graphene is
arranged in a honeycomb lattice structure with a bond length of 0.142 nm
and the angle between each bond is 1200.
- Graphite is rarely found in the
form of mono-crystals, and mostly found in the form of flakes or lumps.
Graphite is formed by hexagonally arranged layers of carbon atoms in a
condensed planer ring system.
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