Vacuum brazing under 1-g and microgravity (carried out on TEXUS II in preparation of an experiment for FSLP) conditions revealed the effect of various parameters (e.g. thermal history, hydrostatic pressure, buoyancy forces) on the microstructure of the joint and the gap filling phenomena.
The following results will be presented:
Design of brazing specimens
Variations of microstructure depending on gap width, gravity, and thermal history
Flow patterns of molten braze as revealed by radioactive tracer experiments
Evaluation of Plateau-type simulation experiments
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The research work at the University of Vienna was supported by a grant from the Austrian Ministry of Science and Research. The investigations at the BAM were supported by a grant from the German Ministry of Research and Technology administered by the DFVLR-Cologne. The authors thank Dr. N. Philippovich for his permission to use unpublished experimental results and Miss E. Schulz for preparing the manuscript.
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Key, F., Roland, S. & Eberhard, S. Brazing Under Microgravity in a Resistance Heated Furnace. MRS Online Proceedings Library 9, 639–649 (1981). https://doi.org/10.1557/PROC-9-639