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8 - Pressure

from Part II - The Atomic Origins of Thermodynamics and Kinetics

Published online by Cambridge University Press:  24 April 2020

Brent Fultz
Affiliation:
California Institute of Technology
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Summary

Phase transitions are driven by pressure as well as temperature, and the use of pressure to tune the electronic structures of materials can help further our understanding of materials properties. Chapter 8 begins with basic considerations of the thermodynamics of materials under pressure, and how phase diagrams are altered by temperature and pressure together. Volume changes can also be driven by temperature through thermal expansion, and the concept of “thermal pressure” from nonharmonic phonons is explained. Electronic energy is responsible for big contributions of +PV to the free energy, and this chapter describes how electron energies are altered by pressure. Cross-terms between temperature and pressure are discussed. The chapter ends with a discussion of kinetic processes under pressure, and the concept of an activation volume.

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Publisher: Cambridge University Press
Print publication year: 2020

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  • Pressure
  • Brent Fultz, California Institute of Technology
  • Book: Phase Transitions in Materials
  • Online publication: 24 April 2020
  • Chapter DOI: https://doi.org/10.1017/9781108641449.011
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  • Pressure
  • Brent Fultz, California Institute of Technology
  • Book: Phase Transitions in Materials
  • Online publication: 24 April 2020
  • Chapter DOI: https://doi.org/10.1017/9781108641449.011
Available formats
×

Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

  • Pressure
  • Brent Fultz, California Institute of Technology
  • Book: Phase Transitions in Materials
  • Online publication: 24 April 2020
  • Chapter DOI: https://doi.org/10.1017/9781108641449.011
Available formats
×