Microstructures

Question 1

A regular arrangement of atoms

Answer 1

Crystalline

Question 2

An irregular arrangement of atoms

Answer 2

Amorphous

Question 3

A mixture of Crystalline and Amorphous.

Answer 3

Semi crystalline

Question 4

Atoms form repetitive patterns.

Answer 4

Unit cells

Question 5

The application of shear stress along the length of an object causes crystal lattices to glide along each other

Answer 5

Slip systems

Question 6

When atoms are in continuous contact.

Answer 6

Closely packed planes

Question 7

Direction in unit cells along which atoms are in continuous contact.

Answer 7

Closely packed direction.

Question 8

48 Slip systems, Good strength and moderate ductility.

Answer 8

BCC

Question 9

12 Slip systems - Moderate strength and good ductility.

Answer 9

FCC

Question 10

3 Slip systems

Answer 10

HCP

Question 11

The surface that separates individual grains.

Answer 11

Grain boundaries

Question 12

Initial process that occurs in the formation of a crystal from a liquid, solid, gas.

Answer 12

Rate of nucleation

Question 13

Increase in size of grains in a material at a high temperature.

Answer 13

Growth rate.

Question 14

Elongation under stress over a period of time, usually at elevated temps

Answer 14

Boundary sliding

Question 15

A crystal where an atom is missing from one of the lattice sites

Answer 15

Vacancy

Question 16

When an atom is replaced with a different type of atom.

Answer 16

Substitution

Question 17

When an atom is replaced with a different type of atom (impurity).

Answer 17

Self-Interstitial

Question 18

Where an atom of a different type occupies an interstitial site.

Answer 18

Interstitial

Question 19

Defects in the orderly arrangement of a metals atomic structure.

Answer 19

Dislocation

Question 20

The atomic plane starts to move which forms an extra portion.

Answer 20

Edge dislocation

Question 21

Typical effect that occurs by screwing out the crystal, atomic plane forms a spiral staircase.

Answer 21

Screw dislocation.

Question 22

Movement of edge dislocation across the crystal lattice under a shear stress.

Answer 22

Dislocation motion

Question 23

A point below the melting point of metals where size and shape can change as well as properties.

Answer 23

Recrystallization temperature

Question 24

Particle with no charge in an atom

Answer 24

Neutron

Question 25

A subatomic particle with a negative charge that orbits the nucleus of an atom.

Answer 25

Electron

Question 26

A subatomic particle with a positive electric charge.

Answer 26

Proton

Question 27

Smallest constituent of a material

Answer 27

Atom

Question 28

Smallest constituent that can be derived from a material whilst still maintaining its identity.

Answer 28

Molecule

Question 29

When a pair of electrons are shared by an atom form the valence shell. Atoms will bond with other atoms to gain stability.

Answer 29

Covalent bonding

Question 30

Unequal sharing of electrons

Answer 30

Polar covalent bonding

Question 31

Equal sharing of electrons

Answer 31

Non-polar covalent bonding

Question 32

Type of chemical bond that generates two oppositely charged ions.

Answer 32

Ionic Bonding

Question 33

Dependency of valence electrons which are freely drifting in the lattice. Sea of electrons

Answer 33

Metallic Bonding

Question 34

No regular ordering of atoms

Answer 34

Inert gas

Question 35

Short ordered arrangement

Answer 35

Steam or Glass

Question 36

Long range order

Answer 36

Metals or Solids

Question 37

Sub energy levels

Answer 37

s (2),p (6),d (10),f (14),g(18),h(22),i(26)

Question 38

Columns

Answer 38

Groups

Question 39

Rows are known as?

Answer 39

Groups