Ch. 5 Diffusion Flashcards by jose acosta

Q

Diffusion(time, position) formula

A

(C(x,t)-C0)/(C1-C0) = 1 - erf(x/2sqrt(Dt))

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Q

Diffusion rate formula

A

D = D0exp-(Q0/RT) T = temp, R = gas constant

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Q

Interdiction

A

Atoms migrate both sides

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Q

Self diffusion

A

Same atoms move around

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Q

Substitutional diffusion

A

Atoms swap places

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Q

Interstitial Diffusion

A

Atoms sneak in between atoms (much faster)

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Q

Case hardening

A

Diffusion carbon in gear

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Q

Doping

A

Applying heat to object and object on top diffuses to object on bottom

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Q

Example of doping

A

chips

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Q

Rate of diffusion

A

J = Flux = mol/cm2s

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Q

Flicks 1st law of difusion

A

-DdC/dx

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Q

Carburizing

A

Diffusing carbon in gas form

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Q

Interpolation formula

A

a-c/a-b=x-z/x-y

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