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MTL 200 EXAM 2 QUESTIONS AND 100% CORRECT ANSWERS

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MTL 200 EXAM 2 QUESTIONS AND 100% CORRECT ANSWERS

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MTL 200 EXAM 2 QUESTIONS AND
100% CORRECT ANSWERS!!
What are silicates primarily made of

Silicon + Oxygen

What are the three subdivisions

Silica
Silica glass
Silcates

Silica info

Si02
Neutral charge
low density
high melting temp

Silca glass info

lots of randomness
inorganic
lower melting point
low viscosity

Silicates info

Simple and layered silicates
layered ones are covalent bond

, Types of Carbon Ceramics

Diamond - Very stable
Graphite - very weak

Diamond - bonding and structure?

Sp3 tetrahedral
strong covalent bonding
Diamond Cubic structure

Graphite - bonding and strucutre?

Sp2 bonds
Van derwal forces
Hexagon layers

Types of imperfections?

Vacancies and interstitial sites

Vacancy rules

Hume-rothery rules
Atomic size - factor less than 15% difference
Crystal structure - same structure Electronegativity- bigger
electro difference leads to higher chance Valences


Interstitial impurity less than 10%

intersitial sites are filled by what?

impurity atoms amongst host atoms

What is Frenkel Defect

Cation vacancy and cation interstitial pair


this is when a cation leaves its normal position and moves into interstitial site

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