Chemical reduction is a common process for producing metal powders that involves reducing metal oxides, carbonates, or nitrates at temperatures below the metal's melting point. This results in a reduced product that is then crushed and ground into a powder. Some advantages are that it is simple, flexible, and an only method for producing powders of metals like molybdenum and tungsten. Electrolytic processing involves electrolysis where a metal deposits as a powder on cathode plates in an electrolytic tank. The deposited powder is then scraped off and pulverized. Decomposition involves breaking down organic substances into simpler forms, and is used for producing iron and nickel powders where decomposition sintering requires less temperature than

3. CHEMICAL REDUCTION
1. The most common chemical powder treatments involve
oxide reduction,
(To reduce metal oxide means to remove oxygen from metal oxides)

4. 2. Metal compounds are such as oxides, carbonates, nitrates
are reduced with H2 Or CARBON or highly reactive metal
3. This process is carried out at temperature
below melting point of metal.
4. The reduced product is then crushed and ground.

5. Advantages of chemical reduction:-
1. Simple,convenient,flexible
2. Only method for producing
powders of molybdenum , tungsten
3. Economical method

6. ELECTROLYTIC
process
It is updation of electroplating
For e.g., if you want to make Cu powder,
then use copper plates as ANODE and
Place Al plates (CATHODE) in electrolytic tank.
Due to electrolysis ,powdery deposit of Cu is produced on cathode.

7. After a definite time , the cathode plates are removed, rinsed
To remove electrolyte and are dried.
The Cu deposited on cathode plates is then scrapped off
and pulverized to produce Powder of desired grain size

8. Copper getting deposited on cathode

9. DECOMPOSITION
1. process by which organic substances
are broken down into simpler forms of matter.
2. In powder metallurgy, it is specially used for iron
And nickel carbonyls.

10. Decomposition sintering of metal requires less temperature
Than normal sintering of metal.
Advantages of this process are
1. Add versatility for micro-structure development
2. Utility in temperature critical processing