Kathmandu University

Mechanical Engineering Department

Manufacturing Process III (MP III)

Year: IV  Sem : I   Faculty: R.C. Poudel

Tutorial Assignment : (Module Two)

Powder Technology

1)      Briefly discuss the history of powder metallurgy.

 2)      What is the relation between compacting pressure and density in pressing the metal powder? 

3)      Explain Spark Sintering with suitable diagram. 

4)      What are main powder metallurgy products?

 5)      Discuss various characteristics of metal powders.

      6)       Draw the flowchart for fabricating metal powder products.

 7)      Write main advantages of powder – technology.

       8)       How are metal powders prepared?

9)      Write short notes on following:

i) Explosive Compacting     ii) Isostatic Molding

iii) Gravity Sintering           iv) Slip Casting

 10)  Why is a metal-powder-compact subjected to sintering? What happens to the metal during sintering?

 11)  What are the main methods employed to compact/press the powders to semi-finished forms? 

12)  Write short notes on:

i) Hot Pressing    ii) Infiltration

iii) Impregnation   iv) Pre-sintering

 13)  Mention various factors influencing strength of powder metallurgy product.

 14) What are the secondary operations (finishing operations) commonly carried out on Pm products?