KIT | KIT-Bibliothek | Impressum | Datenschutz

Three regimes in the tribo‐oxidation of high purity copper at temperatures of up to 150°C

Rau, Julia S. 1; Schmidt, Oliver 1; Schneider, Reinhard 2; Debastiani, Rafaela ORCID iD icon 3,4; Greiner, Christian ORCID iD icon 1
1 Institut für Angewandte Materialien – Werkstoff- und Grenzflächenmechanik (IAM-MMI), Karlsruher Institut für Technologie (KIT)
2 Laboratorium für Elektronenmikroskopie (LEM), Karlsruher Institut für Technologie (KIT)
3 Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT)
4 Karlsruhe Nano Micro Facility (KNMF), Karlsruher Institut für Technologie (KIT)

Abstract:

Surface oxidation of high-purity copper is accelerated under tribological loading. Tribo-oxide formation at room temperature is associated with diffusion processes along defects, such as dislocations or grain boundaries. Here, the additional influence of temperature on the tribo-oxidation of copper is investigated. Dry, reciprocating sliding tests were performed with a variation of the sample temperature between 21 – 150 °C. Microstructural changes were monitored and analyzed with state-of-the-art electron microscopy techniques. Oxide layer formation through thermal oxidation was observed for 150 °C, but not for lower temperatures. As the temperature increases from room temperature up to 100 °C, a significantly stronger tribo-oxidation into deeper material layers and an increase in the amount of formed pores and oxides was detected. Up to 75 °C, diffusional processes of oxygen along grain boundaries and dislocation pipes were identified. Starting at 100 °C, CuO was detected. Hence, tribological loading significantly alters the CuO formation in comparison with static oxidation. Along with the CuO formation at temperatures ≥ 90 °C, the oxide layer thickness decreased while the friction coefficient increased. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000148183
Originalveröffentlichung
DOI: 10.1002/adem.202200518
Scopus
Zitationen: 3
Web of Science
Zitationen: 3
Dimensions
Zitationen: 4
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Karlsruhe Nano Micro Facility (KNMF)
Laboratorium für Elektronenmikroskopie (LEM)
Institut für Angewandte Materialien – Werkstoff- und Grenzflächenmechanik (IAM-MMI)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 11.2022
Sprache Englisch
Identifikator ISSN: 1438-1656, 1527-2648
KITopen-ID: 1000148183
HGF-Programm 43.31.01 (POF IV, LK 01) Multifunctionality Molecular Design & Material Architecture
Weitere HGF-Programme 43.34.02 (POF IV, LK 01) Hybrid and Functionalized Structures
Erschienen in Advanced Engineering Materials
Verlag Deutsche Gesellschaft für Materialkunde e.V. (DGM)
Band 24
Heft 11
Seiten Art.Nr. 2200518
Vorab online veröffentlicht am 24.06.2022
Nachgewiesen in Scopus
Web of Science
Dimensions
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page