lesson 1 Flashcards
(34 cards)
involves
the investigation of the
relationship between the
structure and properties of
materials
Materials science
WHY STUDY MATERIALS SCIENCE
AND ENGINEERING?
in-service conditions must be characterized,
deterioration of material properties
economics:
deals
with the modification of
structure to produce desired
set of properties.
Materials engineering
Material Structure and Properties
Structure
Property
of a material usually
relates to the arrangement of its
internal components
Structure
is a material trait in terms
of the kind and magnitude of
response to a specific imposed
stimulus.
Property
Properties of Materials
Mechanical
Electrical
Thermal
Magnetic
Optical
Deteriorative
hardness, tensile
strength, malleability
Mechanical
electric conductivity
Electrical
thermal conductivity
Thermal
paramagnetism,
diamagnetism
Magnetic
refraction, absorption,
reflection
Optical
corrosion
resistance
Deteriorative
FOUR COMPONENTS OF Mat Sci and Eng’g
PROCESSING
STRUCTURE
PROPERTY
PERFORMANCE
Classification of Materials
METALS
CERAMICS
POLYMERS
COMPOSITES
Materials in this group
are composed of one or
more metallic elements
and often also
non-metallic elements
in relatively
small amounts.
Metals
are compounds between metallic and non-metallic elements; they are most
frequently oxides, nitrides, and carbides.
Ceramics
common ceramic materials include
aluminium oxide
silicon dioxide
silicon carbide
silicon nitride
include the familiar plastic and rubber materials. Many of them are organic
compounds that are chemically based on carbon, hydrogen, and other nonmetallic elements
Polymers
ceramic materials are relatively
_____ and _____—stiffness and strengths are comparable to those of the metals.
they are typically very hard and are highly susceptible to _____
1.stiff and strong to fracture
mechanical characteristics are generally dissimilar to the metallic and ceramic materials—they
are not as stiff nor as strong as these other material types
polymers
is composed of two (or more) individual materials, which come
from the categories previously discussed—metals, ceramics, and polymers.
Composite
fiberglass is
stiff, strong, flexible and low
density
These materials typically have low densities
Polymers