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Influence of faceting-roughening on triple-junction migration in zinc

  • Boris B. Straumal EMAIL logo , Vera G. Sursaeva and Alena S. Gornakova
Published/Copyright: February 3, 2022
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Abstract

The faceting and migration of individual triple junctions in Zn tricrystals under a constant driving force was investigated. The triple junction (TJ) was formed by three [101̅0] tilt grain boundaries (GBs) with misorientation angles θ of 43°, 37° and 6°. The stationary shape of the migrating triple junction was studied, and the migration rate was measured in-situ between 670 and 688 K using polarized light. In some experimental runs, a facet was formed on the θ = 37° [101̅0] tilt GB. This facet was parallel to the close-packed plane in the constrained coincidence site lattice (CCSL). The length of this facet decreases with increasing temperature and becomes zero at 688 K. The temperature dependence of the facet length is better described by the mean-field Andreev approximation than by the solid-on-solid model. The step energy estimated in the framework of the Bonzel approximation is about 0.1 eV/atom. In other experimental runs, the θ = 37° [101̅0] tilt GB did not facet and remained rough in the same temperature interval. This fact allowed us to compare the stationary migration of the same TJ with faceted and rough GBs. ATJ formed by faceted GBs migrates one to two orders of magnitude more slowly in comparison with a rough TJ. An unrealistically high value of the apparent migration activation enthalpy of faceted TJs can appear due to the changing geometry of faceted GBs, similar to the case of migration of faceted twin tips.


Prof. Dr. Boris Straumal Institute of Solid State Physics, Russian Academy of Sciences Chernogolovka, 142432 Russia Tel.: +7 916 676 8673 Fax: +7 495 238 2326

Dedicated to Professor Dr. Lasar Shvindlerman on the occasion of his 70th birthday


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Received: 2005-04-18
Accepted: 2005-07-16
Published Online: 2022-02-03

© 2005 Carl Hanser Verlag, München

Articles in the same Issue

  1. Frontmatter
  2. Editorial
  3. Editorial
  4. Articles Basic
  5. Thermodynamics of grain boundary adsorption in binary systems with limited solubility
  6. Microstructural characteristics of 3-d networks
  7. On the three-dimensional twin-limited microstructure
  8. Grain growth kinetics in 2D polycrystals: impact of triple junctions
  9. Thermal stability of polycrystalline nanowires
  10. Conservative motion of parent-martensite interfaces
  11. Enthalpy – entropy compensation effect in grain boundary phenomena
  12. Thermodynamic stabilization of nanocrystallinity
  13. On the relation between the anisotropies of grain boundary segregation and grain boundary energy
  14. Influence of faceting-roughening on triple-junction migration in zinc
  15. The influence of triple junction kinetics on the evolution of polycrystalline materials during normal grain growth: New evidence from in-situ experiments using columnar Al foil
  16. Grain boundary dynamics and selective grain growth in non-ferromagnetic metals in high magnetic fields
  17. Grain boundary mobility under a stored-energy driving force: a comparison to curvature-driven boundary migration
  18. Diffusional behavior of nanoscale lead inclusions in crystalline aluminum
  19. Quantitative experiments on the transition between linear to non-linear segregation of Ag in Cu bicrystals studied by radiotracer grain boundary diffusion
  20. Room-temperature grain boundary diffusion data measured from historical artifacts
  21. Solid state infiltration of porous steel with aluminium by the forcefill process
  22. A mechanism of plane matching boundary-assisted α/γ phase transformation in Fe–Cr alloy based on in-situ observations
  23. Fast penetration of Ga in Al: liquid metal embrittlement near the threshold of grain boundary wetting
  24. High-pressure effect on grain boundary wetting in aluminium bicrystals
  25. Grain boundary segregation and fracture
  26. Notifications/Mitteilungen
  27. Personal/Personelles
  28. Press/Presse
  29. Conferences/Konferenzen
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