Classification of materials Flashcards
What are the classifications for materials?
- metals
- wood
- polymers
- papers and boards
- composites
- smart materials
- modern materials
What are the clasifications of metals?
- ferrous
- non-ferrous
- alloy
What is a ferrous metal?
A metal containing mostly iron and carbon.
What is a non-ferrous metal?
A metal that does not contain iron.
What is an alloy?
A metal made of two or more metals, or combining two or more elements, one of which must be a metal
What are the classifications of woods?
- hardwoods
- softwoods
- manufactured boards
What is a hardwood?
A wood from a broad leafed (deciduous trees. The tress are generally slow growing and lose there leaves in autumn
What is a softwood?
A wood from a coniferous (cone bearing) tree
What is a manufactured board?
A man-made wood-baked composites material
What are the classifications for polymers?
- thermoplastic
- thermosetting plastic
- elastomer
What is a thermoplastic?
A material which can be repeatedly reheated and reshaped, allowing it to be recycled after its initial use
What is a thermosetting polymer?
A material which when heated undergoes a chemical change whereby the molecules form rigid cross links. They cannot be reheated or reshaped
What is an elastomer?
A material which at room temperature can be deformed under pressure and then released once pressure is released, they are elastic
What are paper and boards?
They can be described as compliant materials, meaning they can be scored, folded and cut with basic tools
What are composites?
A material comprised of two or more different materials, resulting in a material with enhanced properties
