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Grain boundary diffusion and segregation of Ge in Cu: Radiotracer measurements in different kinetic regimes

  • M. Lohmann , S. Divinski EMAIL logo and Chr. Herzig
Published/Copyright: February 5, 2022
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 94 Issue 11

Abstract

Grain boundary (GB) solute diffusion of Ge in Cu polycrystals was systematically investigated by the radiotracer serial sectioning technique using 68Ge and 71Ge isotopes. The diffusion measurements were carried out under conditions of Harrison’s B- (923–626 K) and C- (576–451 K) type diffusion regimes. In the B-type diffusion regime, the triple product P = sδDgb (s is the segregation factor and δ the GB width) was found to follow the Arrhenius law P = 4:0 × 10-16 × exp(-58.6 kJ mol-1/RTÞ m3s-1, where R is the universal gas constant and T the temperature. Measurements in the C-regime directly yielded the GB diffusion coefficient Dgb, Dgb = 2.8 × 10-6 × exp(-84.8 kJ mol-1/RTÞ m2s-1. Combining the obtained P and Dgb values and assuming δ ≌ 5 × 10-10 m, the GB segregation factor for Ge in Cu was determined to follow an Arrhenius dependence s = 0.29 exp(26 kJmol-1/RTÞ. The determined segregation coefficients s are discussed together with previous results on solute segregation in Cu and Ag, and it is concluded that the well-known Hondros relation, which relates segregation and bulk solute solubility, can generally be used only for a qualitative estimation of the segregation ability. Furthermore, the obtained results for the triple product sδDgb and the directly measured Dgb values are discussed in relation to previous GB diffusion measurements of some other solutes in Cu and Ag in the B- and C-regimes.

Keywords: Grain boundary diffusion of Ge in Cu; Grain boundary segregation of Ge in Cu; Hondros relation
Dr. Sergiy Divinski Institut für Materialphysik Münster University Wilhelm-Klemm-Str. 10, D-48149 Münster, Germany Tel.: +49 2 51 83 3 90 30 Fax: +49 2 51 83 3 83 46

  1. The present investigation was supported by funds of the Deutsche Forschungsgemeinschaft (Project No. He848/24 –1). The 71Ge isotope production at the reactor of the GKSS Geesthacht, Germany is greatly acknowledged.

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Received: 2003-07-31
Published Online: 2022-02-05

© 2003 Carl Hanser Verlag, München

Articles in the same Issue

  1. Frontmatter
  2. Articles/Aufsätze
  3. Grain boundary diffusion and segregation of Ge in Cu: Radiotracer measurements in different kinetic regimes
  4. Thermal diffusivities of uniaxially cold-pressed Fe2Mo powders
  5. Dislocation structure and crystallite size distribution in plastically deformed Ti determined by X-ray peak profile analysis
  6. Modeling of texture evolution in copper under equal channel angular pressing
  7. Method for in situ texture investigation of recrystallization of Cu and Ti by high-energy synchrotron X-ray diffraction
  8. Contribution of dislocation substructures developed during cold rolling to the formation of rolling textures in Al–Mg alloys
  9. Controlled change in the plastic working conditions of metals in the plane state of strain
  10. Finite element analysis of the thermo-mechanical fatigue of DD8 single crystal nickel-based superalloy
  11. Factors influencing the extent of hydrogen-enhanced brittle cracking in a Cu-strengthened HSLA steel during monotonic loading
  12. Textures and precipitates in Ti-stabilized interstitial-free steel
  13. Coarsening kinetics of Cu particles in an Fe-1.5% Cu alloy
  14. Kinetics of the discontinuous precipitation of a liquid phase in Cu–In alloys
  15. Influence of homogenization on the processing map for hot working of as-cast Mg–2Zn–1Mn alloy
  16. Some characteristics of electrospark deposition
  17. Aktuelle Arbeiten in der Konstitution
  18. Notifications/Mitteilungen
  19. Personal/ Personelles
  20. DGM Events
https://doi.org/10.1515/ijmr-2003-0214
Keywords for this article
Grain boundary diffusion of Ge in Cu; Grain boundary segregation of Ge in Cu; Hondros relation

Articles in the same Issue

  1. Frontmatter
  2. Articles/Aufsätze
  3. Grain boundary diffusion and segregation of Ge in Cu: Radiotracer measurements in different kinetic regimes
  4. Thermal diffusivities of uniaxially cold-pressed Fe2Mo powders
  5. Dislocation structure and crystallite size distribution in plastically deformed Ti determined by X-ray peak profile analysis
  6. Modeling of texture evolution in copper under equal channel angular pressing
  7. Method for in situ texture investigation of recrystallization of Cu and Ti by high-energy synchrotron X-ray diffraction
  8. Contribution of dislocation substructures developed during cold rolling to the formation of rolling textures in Al–Mg alloys
  9. Controlled change in the plastic working conditions of metals in the plane state of strain
  10. Finite element analysis of the thermo-mechanical fatigue of DD8 single crystal nickel-based superalloy
  11. Factors influencing the extent of hydrogen-enhanced brittle cracking in a Cu-strengthened HSLA steel during monotonic loading
  12. Textures and precipitates in Ti-stabilized interstitial-free steel
  13. Coarsening kinetics of Cu particles in an Fe-1.5% Cu alloy
  14. Kinetics of the discontinuous precipitation of a liquid phase in Cu–In alloys
  15. Influence of homogenization on the processing map for hot working of as-cast Mg–2Zn–1Mn alloy
  16. Some characteristics of electrospark deposition
  17. Aktuelle Arbeiten in der Konstitution
  18. Notifications/Mitteilungen
  19. Personal/ Personelles
  20. DGM Events
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