Ceramics Processing Flashcards

1
Q

What are traditional ceramics?

A

Traditional ceramics are materials made from natural raw materials like clay, silica and feldspar commonly used for products such as pottery, tiles and bricks

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are the main steps involved in processing traditional ceramics?

A

1- Raw material preparation ( crushing/grinding)
2- Forming ( shaping)
3- Drying ( removal of water )
4- Firing (heating to achieve strength!through sintering)
5- Glazing ( for aesthetics and functionality)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Why is firing crucial in traditional ceramic processing?

A

Firing increases the mechanical strength by causing sintering, where particles bond together reducing porosity and improving density

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What are new ceramics?

A

New ceramics are made from pure or synthesized materials, often used for high-performance applications such as electronics, aerospace and biomedical devices.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What distinguishes the processing of new ceramics from traditional ceramics?

A

New ceramics require more precise control of composition and microstructure.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What material is commonly used in new ceramics?

A

Alumina (Al2O3) ; Silicon Carbide (SiC); zirconia ( ZrO2)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What are cermets ?

A

Composite materials made of ceramics particles and metals matrix

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What are the common applications of cermets?

A

They used in applications like cutting tools ; aerospace components and wear resistance coatings

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

How are cermets processed?

A

1- Powder preparation ( both ceramic and metal powders )
2- Mixing and blending
3- Compaction ( using pressing techniques)
4- sintering ( to bond the materials )
5- Finishing ( grinding or coating)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What challenges are encountered in processing cermets?

A

Maintaining uniform distribution of ceramic particles and achieving strong bonding between the metal and ceramics phases

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Why is product design important for ceramics and cermets?

A

Proper design ensure that the material’s properties are fully utilized while minimizing risks like cracking brittleness or premature wear

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What are some key design considerations for ceramic product ?

A

1- Avoid sharp corners( reduce stress concentration)
2- Thermal expansion management ( prevent cracks due to temperature changes)

3- Surface treatment ( improve wear resistance)

4- Porosity control ( ensure proper mechanical properties)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

How does product design in cermets differ from ceramics ?

A

In cermets designers must account for different thermal and mechanical behaviors of the metal and ceramic phases to prevent delamination or failure under stress

How well did you know this?
1
Not at all
2
3
4
5
Perfectly