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Introduction
Intro into material science
23
Mechanical Engineering
Undergraduate 3
05/07/2014

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Cards

Term
Types of metals
Definition
1. Metals
2.Ceramics & Glasses
3. Polymers
4. Composites
5. Semiconductors
Term
Metallic Properties
Definition
-Strong (stiffness)
-Extensive, permanent deformability(ductility)
-A freshly cut steel surface has a metallic luster
-A good conductor of electrical current (conductivity)
Term
Define :strong
Definition
stiffness
Term
Define: Extensice, permanent deformability
Definition
ductility
Term
A freshly cut steel surface has a
Definition
metallic luster
Term
Define: A good conductor of electrical current
Definition
Conductiity
Term
Traditional ceramics
Definition
-heat treated clay
-sand
Term
Modern ceramics
Definition
-automotive
-industrial
-magnetic
-optical
-nuclear
Term
Majority of commercially important cermaics
Definition
compounds of metallic and nonmetallic elements (C,N,O,P or S)
Term
Atomic structure
Definition
can be crystalline or noncrystalline
Term
Metals are always what atomic structure
Definition
crystalline
Term
Glasses(silicates) are always what atomic structure
Definition
noncrystalline, brittle
Term
Glass-ceramics are are always what atomic structure
Definition
: crystalline glass, resistant to thermal shock (cookware)
Term
Define Polymer
Definition
-light weight
-low-cost structural material
-lower strength
-low melting point
-higher chemical reactivity
-substantial progress made for better stiffness, strength
Term
Define compoosites
Definition
combination of metals, ceramics, and polymers
Term
Examples of composites
Definition
-wood
-concrete
Term
define semiconductors
Definition
material that are neither good electrical conductors nor good electrical insulators
Term
Metals are...
Definition
luster
conductivity
ductility
rigidity
long life
heavy reactive to the environment
Term
Ceramics are...
Definition
Compressive
heat resistance
electric insulation
non corrosive
chemical resistance
not flexible
not ductile
brittle
Term
Glasses are...
Definition
Amorphous
Mostly transparent to light
Insulators
Non corrosive
Low strength
Brittle
Term
Polymers are...
Definition
Light weight
Low cost
Flexible
Organic chemistry
Low strength
Low heat rest
High chemical reactivity
Term
Composites are...
Definition
Ductile
Combination of metals ceramics glasses and polymers
May be expensive
Term
Semi-cond are...
Definition
Partial electrical cond
Ability to change the electrical cond by chemical modification
Voltage threshold
May be expensive
Sensitive to temperature
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