Definition of Packing Arrangement:
- Packing Arrangement refers to how particles are arranged in a powder bed. Influences bulk density, porosity, and flow.
Types of Packing:
- Refers to how particles are arranged in a powder bed.
- Cubic Packing (loosest):
- Porosity ≈ 47.6
- Packing fraction ≈ 52.4
- Rhombic (or Hexagonal Close Packing, densest):
- Porosity ≈ 25.9
- Packing fraction ≈ 74.1
Factors Affecting Packing:
- Particle shape: Spheres pack better than irregular particles
- Size distribution: Mixtures of different sizes can reduce porosity
- Moisture and static charges: May disrupt optimal packing
Significance:
- Influences bulk density, flow, and compressibility of powders
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