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diffusion, Phase diagram, Fick's law - Coggle Diagram
diffusion
interstitial diffusion
case hardening
smaller atoms
more rapid
vacancy diffusion
big atoms
number of vacancies
activation energy
Direct exchange vs Vacancy exchange
Vacancy more efficient
net movement of a substance
inter-diffusion
self-diffusion
Phase diagram
solubility limit
maximum concentration for which only a single phase solution exists
설탕물
temperature
composition
Binary phase diagram
T & C
present phase
composition of each phase
weight fraction of each phase
Eutectic phase point
Phase
homogemeous
uniform
chemical
physical
component
pure metal
Strengthening
Alloying
small inpurities
concentration at dislocations
reduce mobility of dislocation
increase strength
no kinetics
equilibrium conditions
degrees of freedom
Gibbs free energy
Fick's law
non-steady state diffusion
시간에 따라서 농도가 다를 때
Complimentary error function
constant concentration at top
steady state diffusion
rate of diffusion
independant of time
Flux proportional to concentration gradient
semiconductor
pre-depsition step
drive-in diffusion
아레니우스의 식
diffusion coefficient increases with increasing T
D has exponential dependence on T