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Unformatted text preview: u | v v M | e-Text Main Menu | Textbook Table of Contents Glossary
pg582 [V] G2 7-27060 / IRWIN / Schaffer iq 12.01.98 plm QC2 rps MP v v crystalline material A material tha
conformation The arrangement of the rotatable bonds
and repeating atomic or molecular arr
within a molecule.
long-range order is established within
congruent melting The equilibrium melting reaction
Part III Properties
Curie temperature The temperatu
that occurs when a solid phase transforms to a liquid
ferromagnetic material exhibits param
phase having identical composition.
Since F and l are constant, the lightest arm will be from a material with the highest u value.
What changes if we require ﬁxed stiffness? If the stiffnessof S, then,
coordination number The number
Czochralski method A process by
neighbors that surround an atom or ion.
crystal of Si of a predetermined orien
core band A band of electron energy levels that is
Solving this expression for d yields:
from a melt of Si.
(usually) completely ﬁlled and is located closer to the
deep drawing A process by which
nucleus 2thanE either the valence or conduction bands.
of metal is shaped into a cup by mech
core this value into Those electrons that
Substitutingelectrons the equation for mass gives: are contained
degree of polymerization The num
within the ﬁlled inner shells of an atom.
2l S 0.5 0.5
to form a polymer; the molecular wei
coring Variation in the solute distribution of a single
divided by the molecular weight of th
The phase arm with a speciﬁed stiffness is one with the highest Coring occurs customary,
lightest due to nonequilibrium solidiﬁcation. value of E
. It is
however, to provide the data in the form of E , as in Figure 14.2–4.
degrees of freedom The number of
because the composition of the solid and the liquid are
variables necessary to specify equilibr
not the same at a speciﬁc temperature.
14.3 GENERAL CONCEPTS
dendrite A treelike structure in a s
corrosion fatigue A degradation mechanism in which
formed due to the pattern of latent he
corrosion and mechanical fatigue occur simultaneously
In this section we consider the features of reinforcement and matrix materials, and the
properties of the interface between them, which are more serious than for the uncollectively responsible
and their synergistic effects are much
usual characteristics of composites. Before discussing these features, however, it is useful
would be predicted from their separate effects.
devitriﬁcation A high-temperature
to consider the mechanics of ﬁber strengthening in composites.
certain oxide glasses to convert the st
coulombic force Name given to the electrostatic force
14.3.1 Strengthening by Fiber Reinforcement
that develops between charged species. The magnitude of
In most force is proportional to the charges ofﬁbers two species
unidirectional ﬁber-reinforced composites, the the do not run co...
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