Materials Science and Engineering: An Introduction

Published by Wiley
ISBN 10: 1118324579
ISBN 13: 978-1-11832-457-8

Chapter 4 - Imperfections in Solids - Questions and Problems - Page 136: 4.7d

Answer

Ag=172 pm, Fcc crystal structure ,1.9 electronegativity Au=166 pm, Fcc crystal structure ,2.54 electronegativity the atomic radius difference is close to 15 Not completely soluble since they do not satisfy the electronegativity requirement.

Work Step by Step

For a substitutional solid solution having complete solubility, the following conditions must be satisfied: 1. Atomic radius difference must be less than 15. 2. Both have same electronegativity. 3. Both have same crystal structure. 4.Both have same valence electrons. Ag=172 pm, Fcc crystal structure ,1.9 electronegativity Au=166 pm, Fcc crystal structure ,2.54 electronegativity the atomic radius difference is close to 15 Not completely soluble since they do not satisfy the electronegativity requirement.
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