The GATE Grind

GATE 2024 MT – Question 27

Manufacturing Processes · Powder metallurgy · 1 mark · Multiple choice

Which one of the following processes is NOT involved in the sintering of a green compact of ceramic powders? Assume that sintering is performed without application of external pressure.

  1. Pore shrinkage
  2. Dynamic recrystallization
  3. Lattice diffusion
  4. Grain boundary diffusion

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Show answer and explanation

Correct answer: (B) Dynamic recrystallization

Explanation

Lattice and grain-boundary diffusion transport material and can shrink pores during sintering.

Dynamic recrystallization requires concurrent plastic deformation and is not a normal mechanism in pressureless ceramic-powder sintering.

Thus **B**.