Chapter 1 Flashcards
What are the 3 types of materials?
Metals
Polymers/plastic
Ceramics
Properties of metals
Strong/ductile
High thermal and electrical conductivity
Opaque and reflective
Properties of polymers
Low strength and density, soft and ductile
Low thermal and electrical conductivities
Opaque translucent and transparent
Properties of ceramics
Hard and brittle
Low thermal and electrical conductivity
Opaque,translucent, or transparent
Material property charts/ ashby chart
Chart that relates two different material properties
What are the quantum numbers
S-2
P-6
D-10
F-12
Primary bonds
Ionic
Covalent
Metallic
Secondary bond
Van Der Waals force
What is ionic bonding?
Between - and + ions
Electrons are transferred
Predominant in CERAMICS
Need large diff in electronegativity
What is a covalent bond?
Share electrons
Valence electrons
Directional bind
What is metallic bonding?
Found in metals and alloys
Delocalized electron cloud
They form conduction electrons
What are vanderwaal forces?
Weak in comparison to primary bonds
From attractive forces between dipoles
