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CE332 Test 1 - 02

Material Fundamentals

TermDefinition
Material Science Regarding Chemical Structure
Material Engineering Designing a material to satisfy a purpose. More than just mechanical loads
5 Properties of materials Mechanical - How much can you load? Thermal - Can is resist desired temperature? Electrical - Is it insulating or conductive? Optical - Translucent, transparent, opaque Aesthetic - Designability
5 Arrangement of internal component Subatomic - electrons and nuclei Atomic Microscopic - microns Mesoscopic - naked eye Macroscopic
4 Atomic Bonding Metallic Covalent Ionic Secondary
Covalent bond Strongest - Sharing one electron
Ionic Transfer of electrons
Metallic sea of electrons, everyone is sharing
Secondary bonds Spaghetti noodles. Chains of bonds connected with other chains
What kind of bond to metals have? Metallic
What kind of bonds to ceramics have? Covalent and Ionic
Wat kind of bonds do polymers have? Covalent and secondary bonds
What kind of bond do semiconductors have? Covalent
Atomic Packing Square vs Hexagonal Example affects density and mechanical properties
Crystalline Materials Long range (present in most of the material) repetitive 3D pattern Properties depend on the spatial atomic arrangement -Metals -Ceramics -Some polymers
Amorphous Solid No long range, maybe some short range -Rubber Many polymers -Glass
Flaws Stress concentration at the edges
Flaws Strength-porosity behaviors graph Inverse relationship
Created by: BrendaTovar3223
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