CHAPTER 1 Flashcards

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1
Q

an interdisciplinary field that studies and
manipulates the composition and structure of materials across length scales to control materials properties through synthesis and processing

A

Materials science and engineering (MSE)

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2
Q

chemical make-up of a material

A

composition

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3
Q

arrangement of atoms, as seen at different levels of detail

A

structure

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4
Q

means how materials are shaped into useful components to cause changes in the properties of different materials

A

processing

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4
Q

refers to how materials are made from naturally occurring or man-made chemicals

A

synthesis

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5
Q

One of the most important functions of materials scientists and engineers is to establish the relationships

A

a. between a material
or a device’s properties
b. performance
c. microstructure of that material - composition
d. the way the material or the device was synthesized and processed

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6
Q

emphasis is on the underlying relationships between the synthesis and processing, structure, and properties of materials

A

materials science

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7
Q

focus is on how to translate or transform materials into useful devices or structures

A

materials engineering

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8
Q

has a profound influence on many
properties of materials, even if the overall composition does not change but change in its internal structure

A

material’s structure

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9
Q

repeatedly bending the pure copper wire

A

a. wire becomes harder
b. increasingl brittle
c. electrical resistivity of the wire increases

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10
Q

microscopic scale structure

A

microstructure

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11
Q

formed by incorporating multiple components in a material in such a way that the properties of the resultant material are unique and not otherwise attainable

A

composites

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12
Q

reasons why Boeing utilized carbon fiber-reinforced plastic

A

to reduce the weight of fuselage thereby increasing fuel efficiency which significantly increases the performance to cost ratio of the aircraft

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13
Q

the five groups of materials

A

a. metals and alloys
b. ceramics, glasses, and glass-ceramics
c. polymers
d. semiconductors
e. composite

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14
Q

copper

A

a. electrical conductor wire
b. high electrical conductivity
c. good formability

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15
Q

gray cast iron

A

a. automobile engine blocks
b. castable
c. machinable
d. vibration-damping

16
Q

alloy steels

A

a. wrenches, automobile chassis
b. significantly strengthened by heat treatment

17
Q

SiO2-Na2O-CaO

A

a. window glass
b. optically transparent
c. thermally insulating

18
Q

Al2O3, MgO, SiO2

A

a. refractories for containing molten metal
b. thermally insulating
c. withstand high temperatures
d. relatively inert to molten metal

19
Q

Barium titanate

A

a. Capacitors for microelectronics
b. high ability to store charge

20
Q

Silica

A

a. optical fibers for information technology
b. low optical losses

21
Q

polyethylene

A

a. food packaging
b. easily formed into thin, flexible, airtight film

22
Q

epoxy

A

a. encapsulation of integrated circuits
b. electrically insulating
c. moisture resistant

23
Q

phenolics

A

a. adhesives for joining plies in plywood
b. strong
c. moisture resistant

24
Q

silicon

A

a. transistors are integrated circuits
b. unique electrical behavior

25
Q

GaAs

A

a. optoelectronic systems
b. converts electrical signals to light
c. used in lasers
d. laser diodes

25
Q

Graphite-epoxy

A

a. aircraft components
b. high strength-to-weight ratio

25
Q

Tungsten carbide-cobalt (WC-Co)

A

a. carbide cutting tools for machining
b. high hardness
c. good shock resistance

25
Q

Titanium-clad steel

A

a. reactor vessels
b. low cost
c. high strength of steel with the corrosion resistance of titanium

26
Q

metallic materials

A

a. used for load-bearing applications
b. mechanical properties are of great practical interest

27
Q

refers to load or force per unit area

A

stress

28
Q

refers to elongation or change in dimension divided by the original dimension

A

strain

29
Q

if the strain goes away after the load or applied stress is removed

A

elastic strain

30
Q

if the strain remains after the stress is removed

A

plastic strain

31
Q

Young’s modulus

A

a. deformation is elastic
b. stress and strain are linearly related
c. slope of the stress strain diagram

32
Q

yield strength

A

level of stress needed to initiate plastic deformation

33
Q
A
34
Q
A