Institute of Energy Research and Physical Technologies > Research groups > Atomic and Molecular Physics at Surfaces > Research > Examination and application of thermophysical-chemical mechanisms of the surface desoxidation for vacuum brazing stainless steels under silane doped argon rough vacuum

Examination and application of thermophysical-chemical mechanisms of the surface desoxidation for vacuum brazing stainless steels under silane doped argon rough vacuum

Project leaders: Prof. Dr. W. Maus-Friedrichs, Dr.-Ing. habil. Kai Möhwald (IW Hannover)

Funding period: 11/2014 - 06/2019
Funding body: DFG
Reference number: MA 1893/24-1

Researcher: B.Sc. Cornelia Strauß

Laboratories: 0.5 (CZM), 410N (IEPT)

 

This project is a collaboration of IEPT (Clausthal University of Technology) and IW (Leibniz Universität Hannover) under the umbrella of Clausthaler Zentrum für Materialtechnik (CZM).
Collectively the mechanisms of desoxidation during vacuum brazing of steels are supposed to be elucidated. A result of preliminary research is that the desoxidation behavior of different steel types varies greatly.
To enable an optimization of future brazing processes a reaction chamber will be constructed that allows to reproduce the conditions of an industrial vacuum brazing process. In this chamber prepared steel samples can be analyzed without atmospheric contact regarding their surface composition and constitution and thereby allow direct conclusions about the influence of temperature during the brazing process. Additionally the influence of different gases is supposed to be examined. For instance it is planned to reproduce brazing processes in silane doped argon rough vacuum.
All experiments are performed in parallel in the reaction chamber at IEPT and in a vacuum brazing furnace at IW. Based on the findings a physical model will be developed which allows predictions for brazing processes.

 

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