The following is a backscattered electron image of a sample of nickel alloy particles that were embedded in a resin, cut, and then polished to reveal the internal structure of the particles. From the image, explain whether you think the alloy has uniform composition or whether it is segregated into phases of different compositions. The resin used for embedding is an electrical insulator. How should such samples be treated before they are examined by SEM?

The following is a backscattered electron image of a sample of nickel alloy particles that were embedded in a resin, cut, and then polished to reveal the internal structure of the particles. From the image, explain whether you think the alloy has uniform composition or whether it is segregated into phases of different compositions. The resin used for embedding is an electrical insulator. How should such samples be treated before they are examined by SEM?

Chemistry for Engineering Students

4th Edition

ISBN:9781337398909

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter8: Molecules And Materials

Section: Chapter Questions

Problem 8.72PAE

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Question

The following is a backscattered electron image of a sample of nickel alloy particles that were embedded in a resin, cut, and then polished to reveal the internal structure of the particles.

From the image, explain whether you think the alloy has uniform composition or whether it is segregated into phases of different compositions. The resin used for embedding is an electrical insulator. How should such samples be treated before they are examined by SEM?

50 um
(Noted: the black region near the center is a crack in the specimen.)

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