Electrical treatment of thermal sprayed copper layers to improve the electrical conductivity

Titel in Übersetzung: Elektrische Behandlung von thermisch gespritzten Kupferschichten zur Verbesserung der elektrischen Leitfähigkeit

Daniel Hohm, Rudolf Gradinger

Publikation: Beitrag in Buch oder TagungsbandVortrag mit Beitrag in Tagungsband

Abstract

A new method to enhance the electrical conductivity of thermal sprayed copper layers has been discovered and investigated. The aim is to reduce the electrical resistance of the copper layers by applying a high electrical current to the layer. Two different types of electrical treatments were conducted: a short-time treatment, in which a high current (up to 1000 A/mm²) is applied for less than 1 second, and a long-time treatment, during which the sample was heated up to approximately 580 °C using the direct heating of the layer by electric current.
The main advantage of the short-term treatment is that it results in an instantaneous improvement in resistance without affecting the surrounding material. The effectiveness of the methods has been proven through an extensive study. The influence of the individual process parameters as well as the influence of the atmosphere on the terminal resistance were determined. Both the metallurgical conditions causing high resistance of the as-deposited layer, as well as the processes leading to a change of the resistance during the electrical treatment, were investigated. This method was developed for the optimisation of a multi-material part, in which the insulated conductive layer is embedded in aluminium by wire arc additive manufacturing. Furthermore, the corresponding effects of both the WAAM process as well as standard aluminium heat treatment were investigated and taken into consideration.
Titel in ÜbersetzungElektrische Behandlung von thermisch gespritzten Kupferschichten zur Verbesserung der elektrischen Leitfähigkeit
OriginalspracheEnglisch
TitelMAMC 2023
UntertitelProceedings of the Metal Additive Manufacturing Conference 2023
Seiten59-68
Seitenumfang10
PublikationsstatusVeröffentlicht - 18 Okt. 2023
VeranstaltungMetal Additive Manufacturing Conference 2023 - WKO Wien, Wien, Österreich
Dauer: 17 Okt. 202319 Okt. 2023

Konferenz

KonferenzMetal Additive Manufacturing Conference 2023
Land/GebietÖsterreich
StadtWien
Zeitraum17/10/2319/10/23

Research Field

  • Wire-Based Additive Manufacturing

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