Unformatted text preview: o gases are chemically reacted to pro
coating of the reaction product, a solid
close-packed direction A crystallog
a crystal along which atoms touch.
close-packed plane A crystallograph
crystal on which each atom contacts si
close-packed structures A crystal o
type in which the spherical atoms are p
possible, giving a coordination number
of 0.74. HCP and FCC are close-packe
coefﬁcient of thermal expansion t h
through the equation t h
t h T , wh
coefﬁcient of thermal expansion is the
relates thermal strain to changes in tem
coherent interface An interface sep
where there is a one-to-one match of l
across the boundary.
cold working Plastic deformation of
at a temperature where dislocations are
than they are annihilated.
component A chemical substance (e
compound) used to specify the compos
composites Materials formed by com
more basic materials in which one mat
reinforcing phase, is in the form of ﬁbe
particles embedded in another material
compression molding A process by
material is shaped by heating and sque
desired shape between two platens tha
concentration polarization A mech
the corrosion rate is reduced due to low
rates within the electrolyte.
concrete A mixture (or aggregate co
containing small sand particles and gra pg040 [V] G2 7-27060 / IRWIN / Schaffer 40 Part I pgm 1-19-98 plm 3-21-98 MP Fundamentals Slope at xo for material A
A Slope at xo for material B
B chaffer rps 01-20-98 rps MP
x Glossary t of energy required to move
nite separation distance. It is
e bond-energy well.
nergy well) The curve that
ted with a pair of atoms or
tance between the two atoms
rve that describes the
al force between two atoms
distance between the two
equivalent to the derivative
ium separation distance
It can be estimated from
e (the point where the energy
force curve (the point where
equation of X-ray
cementite comparison iron bond-force curves for two hypothetical materials, A and B.
An of the carbide phase, Fe3 C.
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