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Asked: March 21, 20202020-03-21T04:38:51+05:30 2020-03-21T04:38:51+05:30In: Physical Metallurgy & Heat treatment

GATE MT 2013 Q38. Match the powder production technique given in Group I with the corresponding shape listed in Group II

Poll Results

70%(A) P-2, Q-4, R-1, S-3 ( 28 voters )
7.5%(B) P-1, Q-3, R-2, S-4 ( 3 voters )
15%(C) P-2, Q-3, R-4, S-1 ( 6 voters )
7.5%(D) P-3, Q-2, R-1, S-4 ( 3 voters )
Based On 40 Votes

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GATE MT 2013 Q38. Match the powder production technique given in Group I with the corresponding shape listed in Group II
GATE MT 2013 Q38. Match the powder production technique given in Group I with the corresponding shape listed in Group II
GATE MT 2013 Question paper with solutionGATE MT Powder metallurgyGATE MT Previous Year Questions With Solutionpowder metallurgy
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    1 Answer

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      Askmemetallurgy Official Gold official account of Askmemetallurgy
      2020-09-24T20:13:06+05:30Added an answer on September 24, 2020 at 8:13 pm

      Correct answer is option A. In solid-state reduction, selected ore is crushed, typically mixed with carbon, and passed through a continuous furnace. In the furnace, a reaction takes place, reducing the carbon and oxygen from the powder, that leaves a cake of sponge metal which is then crushed, separRead more

      Correct answer is option A.

      • In solid-state reduction, selected ore is crushed, typically mixed with carbon, and passed through a continuous furnace. In the furnace, a reaction takes place, reducing the carbon and oxygen from the powder, that leaves a cake of sponge metal which is then crushed, separated from all non-metallic material, and sieved to produce powder.
      • In gas atomisation, molten metal is separated into small droplets (spherical) and frozen rapidly before the drops come into contact with each other or with a solid surface.
      • Electrolysis is carried out at a temperature below melting point of the metal. In this process, deposition will occur in the form of small crystals with dendritic shape.
      • During milling, impact, attrition, shear and compression forces are acted upon
        particles. During impact, striking of one powder particle against another occurs.
        Attrition refers to the production of wear debris due to the rubbing action between
        two particles. Shear refers to cutting of particles resulting in fracture. The particles
        are broken into fine particles by squeezing action in compression force type and result in flaky particles.
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