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level: Introduction

Questions and Answers List

metals, polymers, and more

level questions: Introduction

QuestionAnswer
Type 7 plastic is any plastic that isn't classified as the other six. Like CD's, baby bottles,and headlight lensO (other)
smashing high energy particles to close gaps and decrease energy statesintering
deformation under temperature so recovery can happenhot working
What sedimentary rock is aluminum made frombauxite
What is the process that addresses relationships between processing materials, structures of materials and properties of materialsmaterial 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 propertiesalloying
a change in shape due to the application of forcedeformation
- 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 sizecold 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 agesilicon age
the art of making metals and alloys in shapes and with characteristics suitable for practical use - cold working -hot workingmetallurgy
-deformation under temperature so recovery can happen -above recrystalization temp -formation of new crystals -bad surface finish -no stress formation -no size limithot working
-polymers that soften when heated and regain their form when cooled -acrylic, ABS, PLAthermoplastics
-these plastics can only go through one heating cycle. After said cycle they remain their form permanently -silicon, circuit plastic, computer plasticthermosets
modulus of elasticity that describes stiffness and is a very important property of solid materialsyoung's modulus
natural or synthetic material that is suitable for introduction or to living tissue or augmenting tissue - pacemaker, skin graft, hydrogels, suturesbiomaterial
-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 expansionceramics
smashing high energy particles to close gaps and decrease energy statesintering
Type 1 platic that is commonly used in commercially sold water bottles, soft drink bottes, sports drink bottles and condiment bottlesPET (polyethylene terephthalate)
Type 2 plastic that is used is milk and juice bottles, detergent bottles, shampoo bottles, grocery bags, and ceral box linersPE-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 pactsPVC (polyvinyl chloride)
Type 4 plastic that can be used for dry bags, bread bags, newspaper bags, and paper milk cartonsPE-LD (polyethylene low density)
Type 5 plastic that is used to make yogurt containers, furniture luggage, and winter clothing insulationPP (polypropylene)
Type 6 (aka styrofoam) and can be used for cups, plates, and packing peanutsPS (polystyrene)
Type 7 plastic is any plastic that isn't classified as the other six. Like CD's, baby bottles,and headlight lensO (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