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· Alloys can be formed by combining
many types of materials, not only metals.
· The components of an alloy are the entities that are combined to make
it. For the copper/nickel system the components are the atoms Cu and Ni. For
the ceramic mullite, the components are the compounds alumina (Al2
O3 ) and silica (Si O2).
· When components are combined to form an alloy, the material
system
that results includes all possible alloy compositions.
· Some systems may contain several phases. A phase is a distinct
region of a material that has a particular chemical composition and physical
condition and is separated from other phases by a definite boundary.
· Binary alloys, systems with only
two components, will be used to explore the different ways that alloys can form
in thermodynamic equilibrium.
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