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Questions and Answers
Which rule is NOT part of the Hume-Rothery guidelines for determining solubility in solid solutions?
Which rule is NOT part of the Hume-Rothery guidelines for determining solubility in solid solutions?
What happens when one or more of the Hume-Rothery rules are violated?
What happens when one or more of the Hume-Rothery rules are violated?
Which type of defect consists of a pair of oppositely charged ion vacancies to maintain local charge neutrality?
Which type of defect consists of a pair of oppositely charged ion vacancies to maintain local charge neutrality?
What is a characteristic of the Frenkel defect?
What is a characteristic of the Frenkel defect?
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Which characteristic must solute and solvent atoms share according to the Hume-Rothery rules?
Which characteristic must solute and solvent atoms share according to the Hume-Rothery rules?
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Study Notes
Hume-Rothery Rules
- These rules determine solid solubility of metals
- The rules state that complete solid solubility is possible if the two metals have
- Less than a 15% difference in atomic radii
- The same crystal structure
- Similar electronegativity
- The same valence
- Partial solubility is possible if one or more of the Hume-Rothery rules are violated
- Examples of alloys that follow these rules include brass and bronze
Schottky Defect
- A pair of oppositely charged ion vacancies
- Important as it maintains local charge neutrality within the material's crystal structure
Frenkel Defect
- A vacancy-interstitial combination
- An atom moves from its normal position to an interstitial site, creating a vacancy defect
- Results in no change to the overall charge neutrality of the crystal structure
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Description
This quiz covers key concepts in materials science, focusing on the Hume-Rothery rules that dictate the solid solubility of metals and the types of crystal defects such as Schottky and Frenkel defects. Test your understanding of these fundamental principles and their implications in alloy formation and material properties.
