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Technology 3 - Building Science and Structures > The Solid State > Flashcards

Flashcards in The Solid State Deck (34):
1

Classifying materials into categories of either a solid or a liquid is primarily on response to....

Stress

2

For a material to be classified as a solid it must...

withstand indefinitely the stress imposed by its own weight.

3

under it's own weight liquid will...

Shear instantaneously.

4

What exhibits a purely plastic response and will shear instantaneously under it's own weight...

Liquid

5

A material that will withstand the stress imposed by it's own weight is a

Solid.

6

Many materials response to stress is...

Time dependent.

7

Which state would you find crystalline or amorphous forms

Solid State.

8

In the solid state you're more likely to see forms of

Crystalline or amorphous.

9

Crystalline solids form most readily where the bond is...

non directional.

10

Non directional bonding forms...

crystalline solids

11

Rapid cooling from the liquid state prevents he formation of

crystalline arrays

12

preventing crystalline arrays is a result of...

rapid cooling from the liquid state.

13

When the structure of amorphous materials cannot be distinguished easily from from that of corresponding liquid. The solids are referred to as...

Glasses.

14

Crystallites that are in continuous movement with atoms at the boundaries being lost or gained from other crytallites best describes

liquids

15

A non-crystalline substance consisting of large molecules or ultramicroscopic particles of one substance dispersed through a second substance is referred to as....

colloids

16

What are examples of colloids

gels, sols, and emulsions

17

What is thixotropy?

when a gel / colloid is still the material is solid, but when vigorous stirring occurs the gel reliquifys. When stirring stops, the material solidifes.

18

As the metallic bond is non directional and non specific, the metallic ions...

Pack together as closely as possible.

19

when a gel / colloid is still the material is solid, but when vigorous stirring occurs the gel reliquifys. When stirring stops, the material solidifes. is known as

thixotropy.

20

The metallic crystal can be described as...

a collection of hard, in compressible spheres packed together in a electron gas.

21

a collection of hard, in compressible spheres packed together in a electron gas best describes

The metallic crystal.

22

How many closest neighbours can each ion have on a closely packed plane of metallic ions?

6

23

How many closest neighbours can each ion have on a closely packed plane of metallic ions in a third dimensional setting.

12

24

Closest packed planes of metallic ions can have a stacking sequence of...

ABAB or ABCABC

25

What stacking arrangement in metallic ions is called the close packed hexagonal structure.

ABAB.

26

What are examples of metal which adopt the ABAB, closely packed hexagonal structure...

magnesium & zinc

27

What stacking arrangement in metallic ions is called the face centred cubic structure.

ABCABC

28

ABAB is the stacking arrangement in metallic ions for

close packed hexagonal structure

29

ABCABC is the stacking arrangement in metallic ions for

face centred cubic structure.

30

what are examples of metals which adopt the face centred cubic structure with regards to stacking metallic ions

Aluminium, copper, iron, gold

31

How many closest neighbours can each metallic ion have on a body centred cubic structure

8

32

The occurrence of more than one solid form. e.g body centred cubic structure and face centred cubic structure is called...

Allotropy

33

What is Allotropy

The occurrence of more than one solid form. e.g body centred cubic structure and face centred cubic structure

34

What metal can exist in two solid forms

Iron.