Question

Write short note on Compacting.

Answer 1

Compaction:

• A controlled amount of the mixed powder is introduced into a precision die and then it is pressed or compacted at a pressure in the range 100 MPa to 1000 MPa.
• The compacting pressure required depends on the characteristics and shape of the particles, the method of mixing, and on the lubricant used.
• This is generally done at room temperature. In doing so, the loose powder is consolidated and densified into a shaped model.
• The model is generally called “green compact.” As is comes out of the die, the compact has the size and shape of the finished product.
• The strength of the compact is just sufficient for in – process handling and transportation to the sintering furnace.