Classification of Materials

Question 1

Five Major Group of Materials

Answer 1

Metals
Ceramics
Polymers
Composites
Advance Materials

Question 2

Are made up of one or more metallic elements and often also non-metallic elements in small amounts

Answer 2

Metals

Question 3

Are good conductors of electricity and heat

Answer 3

Metals

Question 4

Are compounds between metallic and non-metallic elements

Answer 4

Ceramics

Question 5

Are usually oxides, nitrides, and carbides

Answer 5

Ceramics

Question 6

Al2O3

Answer 6

Alumina

Question 7

SiO2

Answer 7

Silicon Oxide

Question 8

SiC

Answer 8

Silicon Carbide

Question 9

Extremely brittle and susceptible to fracture

Answer 9

Ceramics

Question 10

Insulative to the passage of electricity and heat

Answer 10

Ceramics

Question 11

Material made up of single crystals

Answer 11

Transparent

Question 12

Material made up of low porosity polycrystal

Answer 12

Translucent

Question 13

Material made up of high porosity polycrystal

Answer 13

Opaque

Question 14

Many are organic compounds that are chemically based on carbon, hydrogen, and other non-metallic elements

Answer 14

Polymers

Question 15

Very large chain-like molecular structures, often carbon

Answer 15

Polymers

Question 16

Means easily formed into complex shapes

Answer 16

Pliable

Question 17

Made up of two or more materials of the previous categories

Answer 17

Composites

Question 18

The objectives is to have a combination of properties not available in any single material

Answer 18

Composites

Question 19

Are glass fibers embedded in a polymeric material

Answer 19

Fiberglass

Question 20

CFRP

Answer 20

Carbon Fiber Reinforced Polymer

Question 21

Are used in aircraft, sporting equipment, bicycles, skis, automobile bumpers

Answer 21

CFRP

Question 22

Are materials used in high technology applications

Answer 22

Advance Materials

Question 23

A device or product that uses intricate and sophisticated principles

Answer 23

High Technology

Question 24

Have electrical properties that are intermediate between conductors and insulators

Answer 24

Semiconductors

Question 25

Electrical properties are very sensitive to the presence of minute concentrations of impurity atoms

Answer 25

Semiconductors

Question 26

Materials used to replace deceased or damaged body parts

Answer 26

Biomaterials

Question 27

Are materials that are able to sense changes in their environment and respond to the changes in a predetermined manner

Answer 27

Smart (Intelligent) Materials

Question 28

Two Components of Smart Materials

Answer 28

Sensors and Actuators

Question 29

Detects an input signal

Answer 29

Sensor

Question 30

Performs a responsive or adaptive function

Answer 30

Actuator

Question 31

MEMS

Answer 31

Microelectromechanical Systems

Question 32

Types of Actuators

Answer 32

Shape-Memory Alloys
Piezoelectric Ceramics
Magnetostrictive Materials
Electrorheological/ Magnetorheological Fluids

Question 33

Are metals that after being deformed revert back to their original shape when temperature is changed

Answer 33

Shape-Memory Alloys

Question 34

Expand and contract when exposed to an electric field; they also generate and electric field when their dimensions are changed

Answer 34

Piezoelectric Ceramics

Question 35

Has the same behavior as piezoelectric ceramics when exposed to magnetic fields

Answer 35

Magnetostrictive Materials

Question 36

Experience changes in viscosity when exposed to electric or magnetic fields

Answer 36

Electrorheological/ Magnetorheological Fluids

Question 37

The dimensions of this material are in order of nanometer

Answer 37

Nanomaterials