Material grouping - Non-Metals (2)

Question 1

Polymers

Answer 1

Solids that have many non-metallic petroleum-based molecules chemically bonded together in chains and links.

Question 2

Thermoplastics

Answer 2

Linear structures

• Soften and melt with heat
• Solid when cooled
• reheat/remold-able
• Less brittle and soluble

Question 3

Thermosetting plastics

Answer 3

Structural three dimensional link

• Solid and hard with heat, chemical reaction, electron beam
• Not reheat/re-moldable
• More brittle and not soluble

Question 4

Elastomers (rubber)

Answer 4

Can be elastically deformed when a force or strain is applied but revert back to their original shape when the force or strain is removed.

Question 5

Ceramics

Answer 5

Typically Crystalline in nature and are Compounds formed between Metallic and Non-Metallic elements.

• Heavy and dense/lightweight
• Strong and hard yet brittle
• Conductor/insulator
• Some have magnetic properties
• High-temperature resistance

Question 6

Composites

Answer 6

Composed of at least two elements to produce properties that are different than the elements have on their own.

Three groups

• Polymer Matrix Composites
• Metal Matrix Composites
• Ceramic Matrix Composites

Question 7

Matrix

Answer 7

Bulk of Composite material

Question 8

Reinforcement

Answer 8

Non-Bulk material in Composites (fibre form)

Question 9

Laminantes

Answer 9

Strength from layers. Layered in alternating Grain, and glued/bonded together.

• Used in the aircraft industry
• Graphite sheets + honeycomb shaped epoxy