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level: Introduction

Questions and Answers List

metals, polymers, and more

level questions: Introduction

Question	Answer
Type 7 plastic is any plastic that isn't classified as the other six. Like CD's, baby bottles,and headlight lens	O (other)
smashing high energy particles to close gaps and decrease energy state	sintering
deformation under temperature so recovery can happen	hot working
What sedimentary rock is aluminum made from	bauxite
What is the process that addresses relationships between processing materials, structures of materials and properties of materials	material engineering
What is the hardest known material, what element is it made from, and why is it so hard?	Diamond, carbon, has strong IMFs
Carbon in equilibrium is...	graphite
Stone was used in the...	stone age
The ability to modify materials with heat, chemical modifications(alloying), and deformation (cold working) was brought about in the... (3000 BC - 1200 BC)	bronze age
combining metals with other substances to create a new metal with superior properties	alloying
a change in shape due to the application of force	deformation
- strengthening a material without the use of heat - deformation where recovery operations are not effective -no crystal formation -good surface finish -internal stress formation -limited size	cold working
The ability to heat treat at high temps, control micrstructure at different length scale and ability to design specific microstructures for specific properties was brought about in the ... (1200 BC - present)	iron age
the use of polymers and polymers synthesis was brought about in the ...	plastic age
the commercialization of this material led to the information age	silicon age
the art of making metals and alloys in shapes and with characteristics suitable for practical use - cold working -hot working	metallurgy
-deformation under temperature so recovery can happen -above recrystalization temp -formation of new crystals -bad surface finish -no stress formation -no size limit	hot working
-polymers that soften when heated and regain their form when cooled -acrylic, ABS, PLA	thermoplastics
-these plastics can only go through one heating cycle. After said cycle they remain their form permanently -silicon, circuit plastic, computer plastic	thermosets
modulus of elasticity that describes stiffness and is a very important property of solid materials	young's modulus
natural or synthetic material that is suitable for introduction or to living tissue or augmenting tissue - pacemaker, skin graft, hydrogels, sutures	biomaterial
-Inorganic compound of metallic or metalloid elements -The non-oxide version of these are covalent bonded and result in high thermal conductivity and low values of thermal expansion	ceramics
smashing high energy particles to close gaps and decrease energy state	sintering
Type 1 platic that is commonly used in commercially sold water bottles, soft drink bottes, sports drink bottles and condiment bottles	PET (polyethylene terephthalate)
Type 2 plastic that is used is milk and juice bottles, detergent bottles, shampoo bottles, grocery bags, and ceral box liners	PE-HD (polyethylene high density)
Type 3 plastic that can be flexible or rigid, and is used for plumbing pipes, clear food packaging, shrink wrap, platic toys, tablecloths, vinyl flooring, and blister pacts	PVC (polyvinyl chloride)
Type 4 plastic that can be used for dry bags, bread bags, newspaper bags, and paper milk cartons	PE-LD (polyethylene low density)
Type 5 plastic that is used to make yogurt containers, furniture luggage, and winter clothing insulation	PP (polypropylene)
Type 6 (aka styrofoam) and can be used for cups, plates, and packing peanuts	PS (polystyrene)
Type 7 plastic is any plastic that isn't classified as the other six. Like CD's, baby bottles,and headlight lens	O (other)
At this step in ceramic production the item can hold its shape but its weak. It needs to be fired to gain strength properties and its very porous.	green body