Diffusion in Solids: Key Concepts

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What is diffusion?

The random movement of atoms within an essentially pure material

The diffusion of small atoms from one interstitial position to another in the crystal structure

The movement of atoms from high to low concentration (correct)

The movement of atoms from low to high concentration

Which mechanism of diffusion involves the diffusion of small atoms from one interstitial position to another in the crystal structure?

Vacancy diffusion

Self-diffusion

External diffusion

Interstitial diffusion (correct)

In what type of material does self-diffusion occur?

Alloy

Elemental solid (correct)

Compound material

Polymer

What is a solid solution?

A homogeneous composition throughout a material resulting from the addition of impurity atoms Signup and view all the answers

What is vacancy diffusion?

The diffusion of atoms when an atom leaves a regular lattice position to fill a vacancy in the crystal Signup and view all the answers

What is the consequence of the constant thermal motion of atoms, molecules, and particles?

Diffusion Signup and view all the answers

Which type of diffusion involves the migration of atoms within an elemental solid?

Self-diffusion Signup and view all the answers

What is the term for the addition of impurity atoms to a metal resulting in the formation of a homogenous composition throughout?

Solid solution Signup and view all the answers

Which law describes steady-state diffusion in materials?

Fick's First Law Signup and view all the answers

In which mechanism for diffusion does an atom leave a regular lattice position to fill a vacancy in the crystal?

Vacancy diffusion Signup and view all the answers

Which type of diffusion involves the migration of small atoms from one interstitial position to another in the crystal structure?

Interstitial diffusion Signup and view all the answers

What is the term for mass transport by atomic motion as a consequence of the constant thermal motion of atoms, molecules, and particles?

Diffusion Signup and view all the answers

In which mechanism for diffusion does an atom leave a regular lattice position to fill a vacancy in the crystal?

Vacancy diffusion Signup and view all the answers

What is the term for the addition of impurity atoms to a metal resulting in the formation of a homogenous composition throughout?

Solid solution Signup and view all the answers

Which law describes non-steady-state diffusion and is represented by Fick’s Second Law?

Fick’s Second Law Signup and view all the answers

Diffusion in Solids: Key Concepts

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Questions and Answers

What is diffusion?

Which mechanism of diffusion involves the diffusion of small atoms from one interstitial position to another in the crystal structure?

In what type of material does self-diffusion occur?

What is a solid solution?

What is vacancy diffusion?

What is the consequence of the constant thermal motion of atoms, molecules, and particles?

Which type of diffusion involves the migration of atoms within an elemental solid?

What is the term for the addition of impurity atoms to a metal resulting in the formation of a homogenous composition throughout?

Which law describes steady-state diffusion in materials?

In which mechanism for diffusion does an atom leave a regular lattice position to fill a vacancy in the crystal?

Which type of diffusion involves the migration of small atoms from one interstitial position to another in the crystal structure?

What is the term for mass transport by atomic motion as a consequence of the constant thermal motion of atoms, molecules, and particles?

In which mechanism for diffusion does an atom leave a regular lattice position to fill a vacancy in the crystal?

What is the term for the addition of impurity atoms to a metal resulting in the formation of a homogenous composition throughout?

Which law describes non-steady-state diffusion and is represented by Fick’s Second Law?

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