• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

materials for toysTYPES OF MATERIALS

Extracts from this document...

Introduction

TYPES OF MATERIALS Michael.h. Wood is a remarkable natural material. It is strong and relatively stiff and light. Its properties compete well with those of artificial materials. The fastest bomber in World War II, the British De Havilland Mosquito, was made of wood. When German intelligence discovered that the Allies were making aeroplanes out of wood, they thought that it was because supplies of metal had run out-not realizing that wood had been carefully chosen partly because it had excellent properties for this design. Wood remains the preferred material for many applications in the building industry throughout the world, and also for much furniture. Stone is another natural material, once used for making simple tools and weapons, and subsequently almost exclusively for buildings and sculptures. ...read more.

Middle

Iron is alloyed with controlled amounts of carbon and other elements to make steel, which was crucial to the Industrial Revolution, and is still by far the cheapest and most widely used metallic material. Aluminium alloys are widely used where weight-saving or corrosion resistance is more important than material cost-for example, in aeroplanes and to some extent in cars. The whole of modern information and communication technology depends on semiconductors. These may be elements, such as silicon, or compounds, such as gallium arsenide, that have just enough electrical conductivity to make them useful for controlling and amplifying electrical signals. Silicon is universally used for digital switching devices such as those that are used in computers. For more difficult jobs, such as converting electrical signals to light or vice versa, semiconductor compounds are used, and it is possible to tailor the properties of components by growing alternating layers of different materials. ...read more.

Conclusion

Polymer boxes can be made with integral hinges that can be flexed many thousands of times, and polymer roasting bags can survive high temperatures in ovens. Silk is a natural polymer that is stronger than many artificial materials. Polymers are usually electrically insulating, but they can also be made with useful conducting properties, and polymer transistors and light-emitting diodes have been produced. Desirable properties of more than one material can be combined in composites. Glass-fibre-reinforced composites (fibreglass) are widely used to give high strength and stiffness without the fragility usually associated with glass. Many composites use carbon or polymer fibres in an epoxy matrix (the matrix is the material in which fibres or particles are embedded). The artificial material that is used in the greatest tonnage throughout the world is concrete, which is a composite of gravel, sand, and cement. Advanced composites are being developed that consist of ceramic fibres and different ceramic or metal matrix materials. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Resistant Materials section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Resistant Materials essays

  1. TENSILE TESTING OF METALS

    Sample F had a higher yield and tensile strength. The tensile strength of the materials showed that sample F was stronger than A as it had the highest value, which meant a greater force is required to deform the material.

  2. EFFECT OF MOISTURE ON THE MECHANICAL PROPERTIES OF NYLON

    thick part. Molecular mobility is increased through the absorption of water. The increase in spacing between Nylon molecules lowers the secondary forces allowing easier transitional motion. This is the major reason for the change in physical properties discussed above. There is less resistance-applied from the decrease in intermolecular friction.

  1. Discuss about the ways how the number of injuries and deaths can be reduced ...

    Intumescent materials react to heat by expanding more than 29 times their initial thickness and foam is developed as the insulating layer. This foam provides protection for about 20 to 120 minutes depending o the thickness of paint applied. However, this does not provide full protection of life but it plays a major role in safety during fire.

  2. But the proportions of these materials have changed. As you can see from Figure1, ...

    which will be fabricated over by different materials. Composites have a very good surface property, which means it is difficult for it to be wear and tear or corroded. Also as it is not a metal, it is impossible to oxidized, therefore its chemical property is very consistent throughout period that it is used.

  1. Major project Outline: Educational Toys

    Analysis of the Research - You must comment on all you have found out from your research explaining how useful it has been and how you intend to use it. You may want to present this information in the form of graphs, charts, tables or text.

  2. The Effect of Different Types of Insulation on Heat Retention

    * Measure 200 ml of water in 5 different beakers and pour them into the cups simultaneously with the help of a funnel.

  1. Investigation Report - What are the most effective materials that can be used to ...

    samples, folded bed sheet linen, folded 100% cotton towel, wood, ceramic (china), latex rubber, plastic rulers, tissues (serviettes), hard foam (mousemat), packaging foam. Method: 1. Stand at a distance where the receiver can receive signals emitted by a remote control - keep this distance constant.

  2. Polymers. Polymers are now widely used in all aspects of modern life. They contribute, ...

    Addition polymers form when a radical initiator adds to a carbon-carbon double bond to yield a reactive intermediate. This intermediate reacts with another monomer molecule to yield a second intermediate. This process of monomer addition is repeated as shown in Figure l (example = polyethylene).

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work