New Materials Flashcards
Materials
What is Glulam?
Gluam stands for Glued Laminated Timber.
A material that uses several pieces of timber that are glued together to create strong components for use in buildings, bridges, etc.
Why is Glulam stronger than timber?
-careful choice of laminates.
-the natural defects found in timber, like knots and shakes are eliminated.
5 advantages of using glulam in construction
-good strength-to-weight ratio, 3x stronger than steel
-fire resistant
-have strength in both directions as grain usually goes different ways.
-sustainable resource.
-easy to work with and can be bent.
What is Kevlar?
A synthetic fibre that is strong, lightweight and heat resistant. Has good tensile strength.
Used in bullet-proof vests, puncture resistant tyres, textiles, ropes, etc.
How is Kevlar added to materials?
Its woven into a variety of materials that are strong and light.
What is Precious Metal Clay (PMC)?
A malleable material used to create jewellery, beads and sculptures.
Made from finely ground metal (silver, gold, bronze, copper) particles mixed with water and an organic binder.
How is Precious Metal Clay (PMC) shaped?
- Shaped using hands/tools
- Allowed to completely dry and then sanded.
- Fired in a kiln, which removes the binder and water, leaving pure metal.
- Polished.
What are Nanomaterials?
A material made by nanotechnology. Created by using particles in size range of 1 to 100 nanometers.
What are 3 uses of Nanomaterials?
Suncream and cosmetics- they coat materials and products.
Energy applications- exploration of using graphene-coated anodes to extend battery life.
Medical applications- carbon nanotubes (layers of rolled up graphene) can deliver drugs as they are hollow and thin.
How has manufacturing changed because of new materials?
-Only a small number of highly skilled technicians are needed to design, build and program devices.
Monitoring can be done by semi-skilled operators.
-CAM, robotics, etc. are now used, replacing workmen.
What is Electrohydraulic Forming?
The way to form complex metal parts in one stage. The action of a shockwave is generated by an electrical spark in a tank of water.
This causes a high-velocity impact between the metal and the die, forming the piece into the die’s shape.
What are some pros of Electrohydraulic Forming?
-does need a two-sided former like the conventional press.
-produce complex and fine detailed shapes.
-deal with a range of materials/thicknesses.
-single stage process.
-very fast
-evenly distributed material (avoids weak points).
How are 3D printed metal products made?
By using a Direct Metal Laser Sinter (DMLS).
A laser is used to sinter (fuse) metal particles layer by layer to build the shape.
Products are lightweight, strong and have complex internal features that casting and machining cant produce.
What is fibre injection moulding?
A variant of injection moulding, but uses an air stream. Uses pellets of nylon.
Popular in automotive industry- glass fibre parts.
Medical equipment and toilet seats (medical equipent).
