Unformatted text preview: axial compositesare formed in ionic solids. The cation We
orking a material.
clusters that using the properties of the constituent materials. : anion
ratio in these clusters is adjusted to maintain
rocess involving the nucleation and
-free grains in a deformed material.
Photomicrograph of the
screw dislocation A dislocation that may be formed by
perature Thetransverse plane of a com-at
posite containing alumina
making a cut in a crystal and displacing the top half of
n occurs within ﬁbers (dark circles) in a masome speciﬁed
the cut region relative to the bottom half in a direction
trix of Al-Li alloy. The pichour.
ture shows the distribution
parallel to the cut. The Burgers vector of a screw
A measure of of ﬁber reactivity of a
the diameters as well
dislocation is parallel to the dislocation line.
r predicting theasseverity between
ﬁbers. (Source: Reprinted
self-diffusion The mechanism by which a species
with permission from A. M.
diffuses in itself.
reaction An electrochemical
semicoherent interface An interface separating two
n a decrease in the concentration of
phases where the differences in the atomic arrangements
of the atoms forming the interface can be accommodated
ding of a light ray as it passes from
semiconductor A class of materials that show an
peed of light in vacuum divided by
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| increase in electrical conductivity as the temperature
a medium; sine of the angle of
the sine of the angle of refraction; a
shear modulus G The slope of the shear stress versus
nt of light reﬂected from a dielectric
shear strain curve in the elastic region. MP v v pg597 [R] factors that affect them, including the inﬂuence of tim
miniature digital computer known as a microprocessor.
G1 interfacial polarization
7-27060 / IRWIN / Schaffer
iq 12.01.98 plm QC2 rps MP1
on phase transformations.
The accumulation of mobile
charge in the regions near grain boundaries or surfaces.
laminate composites Composites made from stackin
several laminae in a predetermined sequence of ﬁber
intermetallics Stoichiometric compounds with
characteristic metal atom ratios such as AlLi, Chapter 14 Composite Materials
Al3 V, AlSb, CuZn, Ti3 Al, and Mg 2 S.
Larsen-Miller parameter A parameter employed in
FIGURE of creep. It may be used at a given stress t
the analysis 14.5–2
interstices The regions between atoms that are deﬁned
Fc = Ff + Fm
Schematic of a
determine how unidirec- the part will last at a given
by at least four atoms or ions. Interstices in crystals are
tional composite loaded by
temperature(a) in to axial
or the determine the maximum allowable
usually tetrahedral or octahedral.
a force F:
direction, for in ﬁxed time duration.
temperatureand (b) a the
interstitial A point defect consisting of an atom or ion
lattice Three-dimensional space-ﬁlling repeatin...
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