Question

A metal nanopowder is produced by four different processes as given below. Spherical morphology of the powder is more likely in?

• A. Electrolytic reduction process
• B. Water atomization process
• C. Machining process
• D. Air atomization process

Hint:

In powder metallurgy, air atomization is often the preferred method for producing spherical metal powders, as it results in uniform particle size and spherical morphology.

Answer 1

The Correct Option is D

Nanopowders are metallic powders that are produced through various processes, which result in different particle morphologies (shapes). The morphology of the powder refers to the shape and size of the individual powder particles.
In the context of nanopowder production, spherical morphology is a common desired shape because it offers desirable properties such as uniformity and better packing characteristics. The process that most likely produces spherical morphology is the air atomization process. In this process, molten metal is atomized by a high-pressure air stream, resulting in the formation of fine metal droplets that solidify into spherical particles. This process is widely used for producing metal powders with uniform particle size and shape.
The other processes mentioned, such as electrolytic reduction, water atomization, and machining, do not typically result in spherical particles. Water atomization can also produce irregular shapes, and machining generally produces large and non-uniform particles.
Therefore, the correct answer is: Air atomization process.