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Engineering Material

Test 1 Short Answer

Explain why metals make good conductors of heat and electricity When they bond, the electrons in the bonding are shared among one another, forming a "sea" of electrons.
What are the 4 classes of materials? Polymers Metals Ceramics Composites
What three things are essential for diffusion to occur? Space Time Energy
Name 5 Hidden costs in the cost of a product (there are PLENTY of answers to this not listed in the answer) Labor Materials Transportation Taxes Inspections (Safety)
Why does interstitial diffusion happen faster than vacancy diffusion? The bonding of interstitials to the surrounding atoms is normally weaker and there are many more interstitial sites than vacancy sites to jump to
Sketch and Label the relationship between the 4 components of the material selection process. Processing -> Structure -> Properties -> Performance
What is a stable electron configuration and how does it influence the reactivity of an element? When all the electron orbitals are full, a stable electron configuration has been created. Examples include the Noble gases (inert as a product of there stable configurations)...because they don't seek interaction, they aren't reactive.
Draw and completely label the Energy trough. (not a drawing, but answer listed is important) Labels on diagrams: Force F Attraction w/arr. Repulsion w/arr. Attractive Force, F_A Net Force, F_N Repulsive Force, F_R r_0 interatomic separation r Potential Energy E Rep. Energy, E_R Net Energy, E_N Attr. En., E_A Bond. En., E_0
Created by: jjardor
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