1.2 - Performance characteristics of materials - Modern Materials

Question 1

What are modern materials?

Answer 1

modern materials are materials that are developed through the invention of new or improved processes

Question 2

Examples of modern materials (4)

Answer 2

• Kevlar
• precious metal clay (PMC)
• high density modelling foam
• polymorph

Question 3

features of kevlar

Answer 3

Aramid fibres with high cut and heat resistant properties

Question 4

uses of kevlar (5)

Answer 4

• body armour
• cut-proof gloves and aprons
• aerospace applications
• surfboard components
• puncture-resistant bicyle tyres

Question 5

features of precious metal clay (pmc) (3)

Answer 5

• clay consistency material made up of fine metal particles
• works like ceramic clay, easily mouldable, easy to shape and form, sets hard once fired with a kiln or butane torch
• inexpensive compared to solid metals such as silver

Question 6

Uses of precious metal clay (PMC) (4)

Answer 6

• Jewellery
• decorative items
• small sculptures
• fobs

Question 7

Features of high density modelling foam (2)

Answer 7

• Polyurethane closed cell foam blocks or sheets
• Lightweight, easy to work using traditional woodworking tools, CNC miller/router, sands easily to allow intricate shaoes and forms to be created

Question 8

Uses of high density modelling foam (2)

Answer 8

• 3D Modelling
• Prototypes

Question 9

Features of polymorph (3)

Answer 9

• Granules which become mouldable at about 60c
• Can be heated in water or with a hair dryer - solidifies at room temp
• Also available in liquid form - liquid at room temp and solidifies at 2c

Question 10

Uses of polymorph (3)

Answer 10

• modelling
• shaping ergonomic handles
• prototype mechanical parts