You have two specimens of copper, both of them polycrystalline. Specimen A has an average grain size of 3.091 μm, while Specimen B has an average grain size of 7.777 μm. Which specimen will silver diffuse through more quickly? Choose the best explanation:
Assuming both specimens are at the same temperature, the diffusivity should be the same through both samples as it is a materials property.
Specimen A should allow silver to diffuse more quickly due to its smaller grain size and increased grain boundary area.
Specimen A should allow silver to diffuse more quickly due to its smaller grain size and decreased grain boundary area.
Specimen B should allow silver to diffuse more quickly due to its larger grain size and decreased grain boundary area.
Specimen B should allow silver to diffuse more quickly due to its larger grain size and increased grain boundary area.
2 answers
(b) II Specimen A should allow silver to diffuse more quickly due to its smaller grain size and increased grain boundary area.
CHEAT!
Do NOT help this person. They are trying to cheat in a midterm exam.
Do NOT help this person. They are trying to cheat in a midterm exam.