Question 1 (15 marks) In powder metallurgy, there are a few methods to produce powder such as atomization, chemical and electrolytic. For atomization, there are three methods, as shown in Figure 1. Molten metal Collection chamber- Water Nozzle- Mr Water jet Gas Siphon- Water Metal powders Water- Collection chamber Spray Metal powders Metal powders Collection chamber Molten metal Figure 1: Atomization processes Molten metal Rotating disk Drive shaft a) Identify each of the atomization processes. (3 marks) b) Explain how an atomization process is carried out. (2 marks) c) Discuss the differences and criteria of powder produced through the atomization processesin Figure 1. (4 marks) d) Conventional pressing and sintering processes are commonly applied on powder produced by the atomization processes. Elaborate the three main steps in such conventional processes. (6 marks)

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Question 1 (15 marks) In powder metallurgy, there are a few methods to produce powder such as atomization, chemical and electrolytic. For atomization, there are three methods, as shown in Figure 1. Molten metal Collection chamber- Water Nozzle- Mr Water jet Gas Siphon- Water Metal powders Water- Collection chamber Spra