Determination of spreading and flow behavior of brazing fillers

Main Article Content

Thomas Uhlig
Benjamin Sattler
Guntram Wagner
Sebastian Weis

Abstract

The development of new brazing fillers requires knowledge about their properties in comparison to well established fillers. Therefore, the determination of the spreading and flow behavior is necessary. By now, different measuring techniques are combined in order to reach a comprehensive understanding of the mechanisms. Especially in case of flux brazing, conventional measuring techniques cannot be used. Due to the industrial demand of application-related experiments, the intended setup should be simple and easily to arrange. This paper deals with the development of a new procedure to determine the spreading and flow behavior of brazing fillers employing flux. The experimental setup, which consists of a commercially available induction heater, equipped with a temperature controller, is mounted inside a gas and vacuum tight chamber. A CCD camera system is used to record the spreading and flow behavior on surfaces as well as inside narrow gaps. The results of experiments using different fillers and base materials are presented. The measurements of the spreading area and the flow velocity under defined conditions allow a quantitative evaluation of the properties of the fillers. Thus, the comparison of different fillers among each other is possible.

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How to Cite
[1]
T. Uhlig, B. Sattler, G. Wagner, and S. Weis, “Determination of spreading and flow behavior of brazing fillers”, WeldTechRev, vol. 91, no. 10, pp. 43-49, Nov. 2019.
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References

Zaremba P., Hart- und Hochtemperaturlöten, DVS-Verlag, Düsseldorf, Germany, 1988.

Villanueva W., Boettinger W. J., Warren J. A., Amberg G., Effect of phase change and solute diffusion on spreading on a dissolving substrate, Acta Materialia, 2009, Vol. 57(20), 6022-6036. [CrossRef]

Yost F.G., The triple line in reactive wetting, Scripta Materialia, 1988, Vol. 38(8), 1225-1228. DOI: 10.1016/S1359-6462(98)00030-X

Kumar G., Prabhu K.N., Review of non-reactive and reactive wetting of liquids on surfaces, Advances in Colloid and Interface Science, 2007, Vol. 133(2), 61-89.

Shibata H., Jiang X., Valdez M., Cramb A. W., The Contact Angle between Liquid Iron and a Single-Crystal Mag-nesium Oxide Substrate at 1873 K, Metallurgical and Materials Transactions B, 2004, Vol. 35(1), 179-181.

Yost F.G., Rye R.R., Mann J.A. Jr., Solder wetting kinetics in narrow V grooves, Acta Materialia, 1997, Vol. 45(12), 5337-5345.

Hall A.C., Hosking F. M., Reece M., Visual observations of liquid filler metal flow within braze gap, Science and Technology of Welding and Joining, 2004, Vol. 9(2), 95-102.