GATE MT 2015 Q59. The driving force for sintering a compact consisting of spherical particles of radius R1 is ΔG1. If the particle size is reduced to R2=0.1 R1, the corresponding driving force ΔG2=αG1, where α is _____.

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Asked: April 4, 20202020-04-04T04:20:51+05:30 2020-04-04T04:20:51+05:30In: Physical Metallurgy & Heat treatment

GATE MT 2015 Q59. The driving force for sintering a compact consisting of spherical particles of radius R1 is ΔG1. If the particle size is reduced to R2=0.1 R1, the corresponding driving force ΔG2=αG1, where α is _____.

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Askmemetallurgy Official · Accepted Answer · 2020-08-06T00:43:53+05:30

Correct answer is 10. We know that driving force is inversely proportional to radius. ΔG∝ 1/R ⇒ ΔG1R 2= ΔG2R 1 As per question, α=ΔG2/ΔG1 = R 1/R 2 = R 1/0.1 R 2 = 10

Correct answer is 10.

We know that driving force is inversely proportional to radius.

ΔG∝ 1/R ⇒ ΔG₁R ₂= ΔG₂R ₁

As per question, α=ΔG₂/ΔG₁= R ₁/R ₂ = R ₁/0.1 R ₂= 10

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GATE MT 2015 Q59. The driving force for sintering a compact consisting of spherical particles of radius R1 is ΔG1. If the particle size is reduced to R2=0.1 R1, the corresponding driving force ΔG2=αG1, where α is _____.

1 Answer

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