Class 1. The world of materials and introduction to materials selection Flashcards
1
Q
What is the most used man-made material?
A. Steel
B. Concrete
C. Timber
D. Brick
A
B
2
Q
what are typical properties of metals(7)
A
- Metallic
- High stiffness/YM
- Usually ductile/low Stress
- Generally tough
- Electrically and thermally conductive
- Subject to corrosion
- Dense
3
Q
What are typical properties of ceramics(7)
A
- Inorganic
- Brittle
- Strong
- High MP
- Resistant to oxidation
- Mid to low density
- Insulator
4
Q
what are typical properties of Polymers
A
-Organic
-High Molecular weight
-Can be Ductile or Brittle
-Can be strong
-Low MP
-Resistant to corrosion but not solvents
-Very low density
-Usually insulators
5
Q
What are the 3 main types of polymers
A
Elastomers
Thermoplastics
Thermosets
6
Q
what is an elastomer
A
a type of polymer
elastic materials, resembling rubber, returning to original shape on unloading
7
Q
what is a thermoplastic
A
a type of polymer
soften with heat and harden on cooling
8
Q
what is a thermoset
A
a type of polymer which is harden by heat
