Chapters 1, 2, 3 (intro, atomic structure and bonding, crystal structure)
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What is a property?
the response of a material to an external effect
Examples of properties
Mechanical, electrical, deteriorative, optical, magnetic, thermal
what are the classes of materials
Metals, ceramics, polymers
what is a metal
inorganic metallic elements
name 2 properties of metals
• Thermal and electrical conductors 2. Strong and ductile
why are metals good conductors
because they have free electrons
what is an alloy
a combination of 2 or more metals and non-metals
What is a ceramic
a compound of metals and non-metals
name 5 properties of ceramics
• Hard and strong 2. Brittle 3. Resist high temps 4. Low density 5. electrical insulators
common example of a polymer
plastic
what is a polymer
a long chain molecule and network usually based on carbon
name 3 properties of polymers
• electrical insulators. 2. low density 3. low operating temperatures
what are composites
a mixture of 2 or more materials
what is unique about semi conductors
they share properties of both insulators and conductors
what types of materials are used in “Bio-Materials”
all
order of density of materials
metals ceramics polymers & composites
order of stifness
metals and ceramics composites polymers
order of strength
metals composites ceramics polymers
order of electrical conductivity
metals semi conductors ceramics and polymers
what do properties of materials depend on
bonds between atoms atomic packing
what is an atom comprised of
Proton + neutron + electron
where is the mass of the atom located
nucleus
where is the volume of the atom located
electron cloud
what does the atomic # dictate
of protons