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Explore the significance of material properties in decision-making for various applications, from bridges to teapots. Learn how factors like flexibility, conductivity, and density influence material selection. Discover the critical traits such as strength, hardness, and melting point that determine the suitability of materials for different purposes. Unravel the distinction between natural and synthetic materials through practical examples and the importance of these distinctions in everyday design and engineering.
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Materials Scientists Making the right choices
How do we decide what material to use for what job? • How do the properties of a material determine its’ use?
Lets start withlooking at why we don’t choose certain materials
Why would we not make… • a rubber bridge • chocolate teapot • a lead parachute • a wooden light-bulb • a glass tyre • a concrete lifebelt Try to use the following words in your explanation: FlexibleConductor BrittleMelting point Density These are physical properties of materials
What would we use to make • a bridge • teapot • a parachute • a light-bulb • a tyre • a lifebelt Try to use the following words in your explanation: FlexibleConductor BrittleMelting point Density
Material Properties • Strength • How much force is needed to break it • Hardness • How difficult it is to scratch • Conductivity (heat and/or electricity) • How well it lets the energy flow through it • Stiffness • How flexible it is • Melting point • The temperature at which it turns from solid to liquid • Density • How much mass it has for a given size
Some of these materials occur naturally • An increasing number are man-made (synthetic) Natural Synthetic
Draw a car and labelwith the material used foreach part and why