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High-Temperature Resistant and Gas-Tight Coatings for Long-Term Heat Treatments using the Example of α-Cu-Al-Zn

  • D. Mey , H. Engelhardt and M. Rettenmayr
Published/Copyright: September 23, 2019
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Practical Metallography
From the journal Practical Metallography Volume 56 Issue 10

Abstract

Cu alloys with relatively small contents of Zn and Al will oxidize heavily during heat treatment in air. Using shielding gas, however, will lead to the evaporation of Zn. A gas-tight coating, which also prevents oxidation, is required when heat treatments are carried out over several days or weeks. In the context of experiments that are aiming at the determination of diffusion parameters such long-term heat treatments are carried out. Different coatings on Cu-Zn12-Al4 (wt.%) heat-treated at 850 °C over 72 h were evaluated. A suitable system of layers consisting of an Y2O3-based and a MgO-based coating was successfully applied using the example of a heat treatment on Cu-Zn15-Al1 at 850 °C over 27 days.

Kurzfassung

Cu-Legierungen mit relativ geringen Gehalten an Zn und Al werden bei Wärmebehandlung an Luft stark oxidiert. Unter Schutzgas kommt es hingegen zum Abdampfen von Zn. Eine gasdichte Beschichtung, welche auch die Oxidation verhindert, ist für die Durchführung von Wärmebehandlungen über mehrere Tage oder Wochen notwendig. Im Rahmen von Experimenten zur Bestimmung von Diffusionskennwerten werden derartig lange Wärmebehandlungen durchgeführt. Es wurden verschiedene Beschichtungen auf Cu-Zn12-Al4 (Gew.-%) bei Wärmebehandlung bei 850 °C für 72 h evaluiert. Ein geeignetes Schichtsystem aus einer Y2O3-basierten und einer MgO-basierten Beschichtung wurde am Beispiel einer Wärmebehandlung von Cu-Zn15-Al1 bei 850 °C für 27 Tage erfolgreich angewendet.

Übersetzung: V. Müller

References / Literatur

[1] Engelhardt, H.; Rettenmayr, M.: Acta Mat.95 (2015), 212–215. 10.1016/j.actamat.2015.05.045Search in Google Scholar

[2] Beißwenger, S.: Mater. Corros.27 (1976) 3, 159–164. 10.1002/maco.19760270305Search in Google Scholar

[3] Felde, N.; Coriand, L.; Duparré, A.; Tünnermann, A.: J. Coat. Sci. Technol.3 (2016), 100–108. 10.6000/2369-3355.2016.03.03.1Search in Google Scholar

[4] Engelhardt, H.; Mey, D.; Lippmann, S.; Liu, D. M.; Kiefer, S.; Rettenmayr, M.: J. Cryst. Growth, 506 (2019), 97–101. 10.1016/j.jcrysgro.2018.10.020Search in Google Scholar

Received: 2019-02-15
Accepted: 2019-03-05
Published Online: 2019-09-23
Published in Print: 2019-10-15

© 2019, Carl Hanser Verlag, München

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  1. Contents/Inhalt
  2. Contents
  3. Editorial
  4. Editorial
  5. Technical Contributions/Fachbeiträge
  6. Beryllium – A Challenge for Preparation and Mechanical Characterization
  7. Investigations on Mechanical Strength and Microstructure of Multi-Pass Welded S690QL HSLA Steel Using MAG and FCAW
  8. High-Temperature Resistant and Gas-Tight Coatings for Long-Term Heat Treatments using the Example of α-Cu-Al-Zn
  9. Microbially Induced Pitting Corrosion on an Austenitic Stainless Steel Pipe
  10. Meeting Diary/Veranstaltungskalender
  11. Meeting Diary
https://doi.org/10.3139/147.110593

Articles in the same Issue

  1. Contents/Inhalt
  2. Contents
  3. Editorial
  4. Editorial
  5. Technical Contributions/Fachbeiträge
  6. Beryllium – A Challenge for Preparation and Mechanical Characterization
  7. Investigations on Mechanical Strength and Microstructure of Multi-Pass Welded S690QL HSLA Steel Using MAG and FCAW
  8. High-Temperature Resistant and Gas-Tight Coatings for Long-Term Heat Treatments using the Example of α-Cu-Al-Zn
  9. Microbially Induced Pitting Corrosion on an Austenitic Stainless Steel Pipe
  10. Meeting Diary/Veranstaltungskalender
  11. Meeting Diary
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