Question:
Fine and spherical powder particles offer poor compressibility and good sinterability. This is due to:
Fine and spherical powder particles offer poor compressibility and good sinterability. This is due to:
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Fine spherical particles have poor packing due to friction, but they sinter well because of high contact surface area.
Updated On: Jun 20, 2025
- Interparticle friction and more contact points
- Narrow distribution and high compression
- More strength and less porosity
- Good flow rate and less friction
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The Correct Option is A
Solution and Explanation
Fine and spherical powders exhibit a high number of contact points between particles.
This leads to:
- Increased interparticle friction, making it difficult for particles to rearrange and compress.
- Therefore, poor compressibility is observed.
However, the large surface area and close contact between particles aid in diffusion during sintering, enhancing sinterability.
Hence, poor compressibility and good sinterability co-exist because of friction and contact points, not because of flow rate or strength.
This leads to:
- Increased interparticle friction, making it difficult for particles to rearrange and compress.
- Therefore, poor compressibility is observed.
However, the large surface area and close contact between particles aid in diffusion during sintering, enhancing sinterability.
Hence, poor compressibility and good sinterability co-exist because of friction and contact points, not because of flow rate or strength.
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