As we continue to use the earth's resources, we are sometimes forced to consider .
The ideal substitue satisfies three requirements:
1.
2.
3.
Material
Composition
Characteristics
Possible Uses
Problems
Ceramics
Clay: Si, O, Al with Mg, Na, K, H20
Hardness, rigidity, low chemical reactifity, resitance to wear, might meltihng points, strength at high temps.
Diesel or turbine engines could operate at higher temps thus running with increased efficiency, and reducing fuel use
Brittle, can fracture if exposed to rapid temp changes
Plastics
Complex C-atoms with H
Weigh less and can be designed to be "springy" or resilient in situations where metals might become dented, can also be designed to be hard, rigid and brittle
Plastic bumpers
Made from petroleum, a nonrenewable resource
Optical fibers
SiO2
Flexible, durable. Can be as long as 100 km
50,000 phone conversations or data transmissions can take place at the same time in one glass fiber the thickness of a human hair!
?
Advanced polymer composites
Fiber-reinforced resins
low density, ability to withstand high temperatures, strength and stability
Have replaced metals in items like "Stealth" aircraft, race cars, skis, inline skates, rocket motor cases
Hundreds of $ per pound!
Copper is currently used in:
Could be replaced with:
Motors
Communication equipment
House wiring
Plumbing
Roofing
Jewelry
Pots & pans
List some common metallic items that might be replaced by ceramic or plastic versions:
, ,
If silver became as common and inexpensive as copper, what uses would it most likely replace copper?
Questions? Comments??
Amanda Noland