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What is the disadvantage of atomization?

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What is the disadvantage of atomization?

(a) Electrical resistivity

(b) Oxidation

(c) Poor mechanical strength

(d) Coarse grains

I got this question in my homework.

This key question is from Sintering and Compacting, Pig Iron and its Manufacture topic in chapter Testing of Materials, Foundry & Powder Metallurgy of Engineering Material & Metallurgy

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The correct answer is (b) Oxidation

To explain: This process is mostly similar to pulverization but requires special nozzles at controlled temperature and pressure. It has a disadvantage of oxidation of molten metal when in contact with air.

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