Question:
Densification of green compacts during sintering is predominantly by:
Densification of green compacts during sintering is predominantly by:
Show Hint
Densification during sintering is achieved by volume diffusion, which reduces porosity by transporting material into pore spaces.
Updated On: Jun 20, 2025
- Adhesion mechanism
- Recrystallization
- Volume diffusion
- Surface diffusion
Hide Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
During sintering of green compacts, densification refers to the elimination of pores and the reduction in total porosity.
This process is governed by the mechanism that allows the atoms to move into the pore spaces, thereby leading to shrinkage.
Volume diffusion (or lattice diffusion) is the dominant mechanism responsible for densification.
It allows atoms to migrate from grain boundaries and surfaces into the pores within the compact, reducing voids and increasing the density.
On the other hand:
- Surface diffusion only helps in neck growth without significant densification.
- Recrystallization and adhesion do not contribute significantly to densification during sintering.
This process is governed by the mechanism that allows the atoms to move into the pore spaces, thereby leading to shrinkage.
Volume diffusion (or lattice diffusion) is the dominant mechanism responsible for densification.
It allows atoms to migrate from grain boundaries and surfaces into the pores within the compact, reducing voids and increasing the density.
On the other hand:
- Surface diffusion only helps in neck growth without significant densification.
- Recrystallization and adhesion do not contribute significantly to densification during sintering.
Was this answer helpful?
0
0
Top Questions on Metallurgy
- In LD process, silicon removal takes place before carbon removal since:
Match the following processes with their physical principles:
- Back Scattered electrons are used in:
- Which of the following is a common defect in wire drawing processes, particularly when excessive friction is present at the die-workpiece interface?
- What is the relationship between the frequency of the sound waves and the ability to detect smaller defects in Ultrasonic testing?
View More Questions
Questions Asked in AP PGECET exam
- If \( A \) and \( B \) are two mutually exclusive events with \( P(B) \ne 1 \), then the conditional probability \[ P(A \mid \overline{B}) = \,? \] where \( \overline{B} \) is the complement of \( B \)
- AP PGECET - 2025
- Probability and Statistics
- If \( X \) is a continuous random variable with the probability density function
\[ f(x) = \begin{cases} cx^3, & 0 \le x \le 2 \\ 0, & \text{otherwise} \end{cases} \] then \( P\left( \frac{1}{2} < X < \frac{3}{2} \right) \) is ..........- AP PGECET - 2025
- Probability and Statistics
- The line integral of the vector field \( \vec{F} = x\hat{i} - 2y\hat{j} + z\hat{k} \) along the straight line path from the point \((-1,2,3)\) to \((2,3,5)\), is ..........
- AP PGECET - 2025
- Calculus
- The Laplace transform of \( e^{-2t} \cos(\sqrt{2} t) \) is .......
- AP PGECET - 2025
- Laplace transforms
- Consider the improper integral \( I = \int_{2025}^{2030} \frac{1}{(x - 2025)^k} \, dx \), where \( k > 0 \). Which of the following is true for \( I \)?
- AP PGECET - 2025
- Calculus
View More Questions