Advanced Materials

Question 1

is a super strong material that is extremely lightweight. generally has excellent tensile properties, low densities, high thermal and chemical stabilities in the absence of oxidizing agents, good thermal and electrical conductivities, and excellent creep resistance.

Answer 1

Carbon Fiber

Question 2

is an important part of new material, widely used in communication, electronics, aviation, aerospace, military, and other high-tech fields, and has important applications in information and communication technology.

Answer 2

Advanced ceramic material or special ceramics

Question 3

are a special category of plain carbon steels with microalloying elements, such as vanadium (V), niobium (Nb), or titanium (Ti), and possess superior mechanical properties.

Answer 3

Microalloyed steels, also known as High-Strength Low-Alloy HSLA steels

Question 4

is the study of the characteristics and uses of the various materials, such as metals, ceramics, and plastics, that are employed in science and technology.

Answer 4

Material Science

Question 5

Examples of Advanced Materials
Light Metals:

Answer 5

titanium, magnesium, aluminum

Question 6

Examples of Advanced Materials
Composites:

Answer 6

carbon fiber, Kevlar, nanocomposites, metal luminates

Question 7

Examples of Advanced Materials Steels:

Answer 7

dual-phase steels, trip steel, bake hardening steels

Question 8

Invented Carbon Fibers

Answer 8

Thomas Alva Edison, 1879

Question 9

carbon fiber atoms is comparable to ___

Answer 9

chicken wire.

Question 10

a carbon fiber producer -worldwide consumption for sporting goods is nearly 11 million lb of carbon fiber.

Answer 10

Mitsubishi Rayon Co. Ltd (Tokyo Japan)

Question 11

Advantages of carbon fiber

Answer 11

Lightweight
High tensile strength
Low thermal expansion
Exceptional durability
Corrosion-resistance
Radiolucence
Electrical conductivity

Question 12

Disadvantages of Carbon FIber

Answer 12

Carbon fiber will break or shatter
Relative cost

Question 13

(modulus > 450 Gpa) Tensile elastic modulus: 600 GPa or higher / Tensile strength: 2,500 MPa or higher

Answer 13

Ultra high elastic modulus type (UHM)

Question 14

(modulus between 350-450Gpa) Tensile elastic modulus: 350-600 GPa/ Tensile strength: 2,500 MPa or higher

Answer 14

High elastic modulus type (HM)

Question 15

(modulus between 200-350Gpa) Tensile elastic modulus: 280-350 GPa / Tensile strength: 3,500 MPa or higher

Answer 15

Intermediate elastic modulus type (IM)

Question 16

(modulus<100 Gpa, tensile strength > 3.0 Gpa)Tensile elastic modulus: 200-280 GPa /Tensile strength: approximately 2,500 MPa or higher

Answer 16

Standard elastic modulus type (HT)

Question 17

(tensile strength > 4.5 Gpa) Tensile elastic modulus: 200 GPa or lower/ Tensile strength: 3,500 MPa or lower

Answer 17

Low elastic modulus type (LM)

Question 18

Based on Precursor Fiber Materials

Answer 18

1. PAN-based carbon fibers
2. Pitch-based carbon fibers
3. Rayon-based carbon fibers
4. Gas-phase-grown carbon fibers

Question 19

2 types of Pitch-based carbon fibers

Answer 19

a. Mesophase pitch-based carbon fibers
b. Isotropic pitch-based carbon fibers

Question 20

A type of fiber having high tensile strength and high elastic modulus, extensively applied for structural material composites in aerospace and industrial field and sporting / recreational goods.

Answer 20

PAN-based carbon fibers

Question 21

It is produced by carbonization of oil/coalprecursor, having extensive properties from low elastic modulus to ultra-high elastic modulus. Fibers with ultra high elastic modulus are extensively adopted in high stiffness components and various uses as utilizing high thermal conductivity and / or electric conductivity.

Answer 21

Pitch-based carbon fibers

Question 22

were pyrolyzed to form the first high-strength carbon fibers. Enhanced elasticity, Tunable electric resistance in a range from 10-3 up to 107 Ohm·cm, High sorption capacity of the activated fiber.

Answer 22

Rayon-based carbon fibers

Question 23

is manufactured through the catalytic decomposition of hydrocarbons such as methane and benzene in the vapor phase

Answer 23

Gas-phase-grown carbon fibers

Question 24

final treatment should be above 2000oC and can be associated with high modulus type fiber.

Answer 24

Type-I, high-heat-treatment carbon fibers (HTT)

Question 25

final heat treatment temperature should be around or above 1500oC and can be associated with high-strength type fiber.

Answer 25

Type-II, intermediate-heat-treatment carbon fibers (HT)

Question 26

final treatment temperatures not greater than 1000oC. Low modulus and low strength materials.

Answer 26

Type- III, low-heat treatment carbon fibers