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MTL 200 Chapters 12-17 Final Exam Review Questions and Answers 100% Accurate
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MTL 200 Chapters 12-17 Final Exam Review Questions and Answers 100% Accurate MTL 200 Chapters 12-17 Final Exam Review Questions and Answers 100% Accurate MTL 200 Chapters 12-17 Final Exam Review Questions and Answers 100% Accurate MTL 200 Chapters 12-17 Final Exam Review Questions and Answ...

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  • July 13, 2024
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  • 2023/2024
  • Exam (elaborations)
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  • mtl 200 chapters 12 17 final exam review questions
  • mtl 200 chapters 12 17 final exam review stuvia
  • ceramics answer composed of two elements more c

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MTL 200 Chapters 12-17 Final Exam Review Questions and Answers 100% Accurate
Ceramics - ANSWER-composed of two elements, more complex structures than metals
Ceramics bonding - ANSWER-purely ionic to totally covalent
Ion sizes and arrangment in ceramics - ANSWER-size of anion is much greater than the
cation. anions want to touch as many cations as possible (to be most stable)
Silica - ANSWER-forms: quartz, cristobalite, tridymite, low densities
Silica glasses - ANSWER-formed using network formers, lower melting point and viscosity
Crystal structure influence - ANSWER-electrical charge of ion (must be 0, neutral) and relative sizes of anion and cation (rc/ra is less than 1)
Frenkel defect - ANSWER-cation leaving its normal position and moving into an interstitial site
Coordinate number is based on - ANSWER-ratio of radii (rc/ra)
Most common coordination numbers in ceramics - ANSWER-4,6,8
Coordination #12 - ANSWER-rc/ra > 1
Size of ion depends - ANSWER-coordination number increasing (radius increases with the number of the neighbour the opposite charge), charge of ion (radius increases with the ions of number of e-)
AX ceramic - ANSWER-#cations = # anions
Rock salt structure - ANSWER-4 atoms (similar to FCC), a = 2(rc+ra)
Cesium chloride - ANSWER-1 formula unit, a = 2/sqrt3(rc+ra), anions at the corner and cation in the middle
Zinc blend structure - ANSWER-FCC structure, highly covalent, a = 2sqrt(2)(rc+ra)
AmXp type ceramic - ANSWER-examples: ZrO2 VO2, PuO2, ThO2

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