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MATERIAL SCIENCE !!!ENRICHMENT WORKSHOP FOR GIFTED
CHILDREN
NO LIMITS TO LEARNING!BELIEVE & YOU CAN ACHIEVE!
Dr Lakshmi Sharmawww.drlakshmisharma.com
What is Science?
Science is ………. Biology Physics
Chemistry
What is Material Science?
Material Science
Material ScienceInvestigation of the relationship among processing, structure, properties and performance of materials.
History of Material ScienceStone Age
People began to make tools from stone Natural materials: stone, wood, clay, skins, etc.Bronze Age
Bronze is an alloy (a metal made up of more than on element), copper + < 25% tin other elements.Iron Age Use of iron and steel, a stronger and cheapermaterial
The Origin of Materials
Game 1 On the table are some items
How would you classify them, what similar properties do they have ????
You have 5 minutes !!!!
Classification of Materials Metals Ceramics: inorganic nonmetallic solid – clay, bricks, pipes Polymers Semiconductors:material with electrical conductivity Semiconductor materials are the foundation of modern electronics, including radio, computers, telephones, and many other devices.
Polymers The most important group of materials Long chain carbon backbone Plastics are a type of polymer Polymers occur naturally and can be synthesised (made)
Polymers
Monomer + reactant Polymer(usually toxic - carcinogen) (usually ok)
Game 2
In front of you are objects which do you think are polymers? You have 2 minutes to decide !
Game 3
Imagine life without polymers !
Discuss what you would miss most !
Structure Structure is the fundamental issue
Decides on the performance of the Material.
DIAMOND OR GRAPHITE ?????
Game 4 You have spaghetti sticks in front of you can you construct the molecular structure on the sheet provided ?????
You have 5 minutes.
Polymers in NatureNature is amazing look at these polymers!!!!
Can you recognise them?
Polymer Research Spider webs as a source of polymer
Bacteria polymer for heart valves
Shells/molluscs for new materials - chitin
Current Material Development Biodegradable materials
Nanomaterials:one billionth of a metre, Human hair: ~10,000 nanometers in diameter, sunscreens coat your skin with a layer of nanoscopic titanium dioxide.
Nano-coatings on scratch-resistant car bumpers, corrosion resistant paints, andwound dressings.
Current Material Development
“Smart” materials:Self-healing materials ability to repair damage due to normal usage, thus expanding the material's lifetime : Shape memory materials maintain fixed shape even after distortion
New Materials Challenge !
Can you think of Future Materials?????
HOPE YOU ENJOYED THIS WORKSHOP ON MATERIAL SCIENCE !!!
NO LIMITS TO LEARNING!BELIEVE & YOU CAN ACHIEVE!
Dr Lakshmi Sharmawww.drlakshmisharma.com
