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Dispersion strengthening of copper by internal oxidation of rapidly solidified Cu-RE alloys

Part II: Experimental study of internal oxidation
  • Ivan Anzel EMAIL logo , Albert C. Kneissl , Ladislav Kosec , Rebeka Rudolf and Leo Gusel
Published/Copyright: February 7, 2022
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 94 Issue 9

Abstract

Combination of rapid solidification and internal oxidation was used for producing a fine dispersion of rare earth oxide particles in the copper matrix. An overall microstructural analysis has shown that the internal oxidation temperature, the rapidly solidified microstructure and its changing ahead of the internal oxidation front strongly influence the mechanism of the internal oxidation process and the resulting microstructure. The internal oxidation in a Cu –Yb alloy took place mainly by direct oxidation of intermetallic particles. Contrary to this, in a Cu – Er alloy two mechanisms of internal oxidation have been clearly observed: (i) Dissolution of intermetallic particles ahead of the internal oxidation front and oxidation of the erbium from the solid solution and (ii) direct oxidation of the Cu–Er intermetallic particles. While a reasonable optimum combination of processing conditions at internal oxidation in the solid state, yielding suitable oxide dispersions, seems to have been identified for the Cu–Er alloy, the same was not true for the Cu–Yb alloy. However, the internal oxidation of the Cu–Yb alloy in the semisolid state, which occurs by alternation of two processes – Yb oxides precipitation and Cu matrix solidification – led to a relatively uniform dispersion of Yb oxide particles.

Keywords: Copper-rare earth alloys; Internal oxidation; Rapid solidification
Prof. Dr. Ivan Anzel Faculty of Mechanical Engineering University of Maribor Smetanova 17, SI-2000 Maribor, Slovenia Tel.: ++3 86 22 20 78 61 Fax: ++3 86 22 20 79 90

  1. For financial support the authors are grateful to the Slovenian Ministry for Education, Science and Sport and to Austrian Ministry for Education and Science.

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

© 2003 Carl Hanser Verlag, München

Articles in the same Issue

  1. Frontmatter
  2. Articles/Aufsätze
  3. Bulk and grain boundary diffusion of Ag in γ-FeNi alloy
  4. Thermodynamics of ordered intermetallic compounds containing point defects
  5. Relationship between the sodium oxide activity of ceramic (Na-β + β″)-alumina and the sodium activity in the ambience of the material
  6. Calorimetric study of MgZn2 and Mg2Zn11
  7. The (γ + γ′)/γ′ phase boundary in the Ni–Al phase diagram from 600 to 1200 °C
  8. Experimental investigation and thermodynamic calculation of ternary Al–Ca–Mg phase equilibria
  9. Texture development in Al alloys during tensile testing
  10. Dispersion strengthening of copper by internal oxidation of rapidly solidified Cu-RE alloys
  11. The effect of Cu and Al on the mechanical properties of gravity-cast hyper-eutectic Zn–Al-based alloys
  12. Hot deformation characteristics of Ti-6Al-4V
  13. Effect of carbon and nitrogen on the stacking fault energy of high-alloyed iron-based austenite
  14. Influence of charged hydrogen on tensile behavior of a pressure vessel steel at relatively high temperatures
  15. The damping behavior of a Ni-50 at.%Ti shape memory alloy
  16. Development of SMD 32.768 kHz tuning fork-type crystals
  17. Investigation of the miscibility gap region in liquid Ga–Pb alloys
  18. Notifications/Mitteilungen
  19. Werner-Köster-Preis 2002
  20. Personal/Personelles
  21. Information
  22. Books/Bücher
  23. Conferences/Konferenzen
https://doi.org/10.1515/ijmr-2003-0180
Keywords for this article
Copper-rare earth alloys; Internal oxidation; Rapid solidification

Articles in the same Issue

  1. Frontmatter
  2. Articles/Aufsätze
  3. Bulk and grain boundary diffusion of Ag in γ-FeNi alloy
  4. Thermodynamics of ordered intermetallic compounds containing point defects
  5. Relationship between the sodium oxide activity of ceramic (Na-β + β″)-alumina and the sodium activity in the ambience of the material
  6. Calorimetric study of MgZn2 and Mg2Zn11
  7. The (γ + γ′)/γ′ phase boundary in the Ni–Al phase diagram from 600 to 1200 °C
  8. Experimental investigation and thermodynamic calculation of ternary Al–Ca–Mg phase equilibria
  9. Texture development in Al alloys during tensile testing
  10. Dispersion strengthening of copper by internal oxidation of rapidly solidified Cu-RE alloys
  11. The effect of Cu and Al on the mechanical properties of gravity-cast hyper-eutectic Zn–Al-based alloys
  12. Hot deformation characteristics of Ti-6Al-4V
  13. Effect of carbon and nitrogen on the stacking fault energy of high-alloyed iron-based austenite
  14. Influence of charged hydrogen on tensile behavior of a pressure vessel steel at relatively high temperatures
  15. The damping behavior of a Ni-50 at.%Ti shape memory alloy
  16. Development of SMD 32.768 kHz tuning fork-type crystals
  17. Investigation of the miscibility gap region in liquid Ga–Pb alloys
  18. Notifications/Mitteilungen
  19. Werner-Köster-Preis 2002
  20. Personal/Personelles
  21. Information
  22. Books/Bücher
  23. Conferences/Konferenzen
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