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Distribution and Energies of Grain Boundaries in Magnesia as a Function of Five Degrees of Freedom
- Source :
- Journal of the American Ceramic Society. 85:3081-3083
- Publication Year :
- 2004
- Publisher :
- Wiley, 2004.
-
Abstract
- The multiplicity of distinct grain boundary configurations in polycrystals has made it difficult to determine the relative frequency with which each configuration is adopted. As a result, the physiochemical properties of each boundary and the influence of the distribution of boundaries on macroscopic materials properties are not well understood. Using a semiautomated system, we have measured all five macroscopically observable degrees of freedom of 4.1 × 106 boundary plane segments making up 5.2 × 106μm2 of grain boundary interface area in a magnesia polycrystal. Our observations demonstrate that not all grain boundary configurations occur with the same frequency and that the relative free energies of the different interfacial configurations influence the population distribution. Furthermore, the results indicate that relative grain boundary energies can be estimated based on the free surface energies.
- Subjects :
- education.field_of_study
Materials science
Condensed matter physics
Scanning electron microscope
Magnesium
Population
Mineralogy
chemistry.chemical_element
Observable
chemistry
Free surface
Materials Chemistry
Ceramics and Composites
Grain boundary
Free energies
Multiplicity (chemistry)
education
Subjects
Details
- ISSN :
- 15512916 and 00027820
- Volume :
- 85
- Database :
- OpenAIRE
- Journal :
- Journal of the American Ceramic Society
- Accession number :
- edsair.doi...........7e40795f053c4662226cc497db4295a4
- Full Text :
- https://doi.org/10.1111/j.1151-2916.2002.tb00583.x