Explain Apparent density and Sintering ability? || Write the process to Control of The Powder Metallurgy?

Apparent density: 

Apparent density of a metal powder, or the weight of a unit volume of loose powder expressed in grams per cubic centimeter, is one of the fundamental properties of a powder. This characteristic defines the actual volume occupied by a mass of loose powder, which directly affects processing parameters such as the design of compaction tooling and the magnitude of the press motions required to compact and densify loose powder.

Sintering ability: 

Sintering is the bonding process of powder particles by heating. The compacted product is heated to a high temperature approximately 70% to 90% of the melting point of the metal or alloy. 

Control of The Powder Metallurgy Process

Control of the powder metallurgy process of a given product can be done by controlling the following factors:

1- Physical charater of powders.

2- Chemical charater of powders.

3- The pressure and time cycle during compression.

4- The tempreture and time of sintering.

5- Effect of hot pressing.

6- Atmosphere control.

7- Lubricants.

8- Secondary operation.