Ceramics Flashcards
1
Q
What can be said about the atomic packing of Crystalline and Noncrystalline materials?
A
Crystalline - atoms pack in periodic, 3D arrays
Noncrystalline - atoms have no periodic packing
2
Q
What are the 3 forming methods?
A
- Pressing (die pressing, isostatic pressing)
- Casting (slip casting, tape casting)
- Plastic forming (extrusion, injection moulding)
3
Q
What is the production process for ceramics?
A
- Powder
- Mixing
- Forming
- Shaped Powder Form (Green Body)
- Firing
- Dense Polycrystalline Ceramic
4
Q
What are 4 important microstructural features?
A
- Grain size
- Shape of grains
- Volume fraction of phases
- Porosity
5
Q
What are bioceramics?
A
Ceramics and glasses that are biocompatible with human tissue and that are placed in the body to replace a function
6
Q
Why cant ceramics be cast like metals?
A
Their high melting points, typically formed from powders?
7
Q
How is the strength of ceramics materials characterised?
A
Bend testing
