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_________ is the process done to reduce the void space in the sintered part.

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_________ is the process done to reduce the void space in the sintered part.

(a) Sizing

(b) Coining

(c) Machining

(d) Infiltration

I had been asked this question in an interview for internship.

This is a very interesting question from Sintering and Compacting, Pig Iron and its Manufacture in section Testing of Materials, Foundry & Powder Metallurgy of Engineering Material & Metallurgy

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Right answer is (b) Coining

Explanation: The sintered part is repressed in the die to reduce the void space and impart the required density. This is known as coining. Sizing operation improves the surface finish of the component at the cost of change in density.

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