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7. Transient Liquid Phase
Transient Liquid Phase (TLP) is a variant of diffusion welding, since it involves atomic diffusion mechanisms. Two metallic materials are brought into contact and heated to a temperature that allows atomic migration from one material to the other. Diffusion of the alloying elements present in the base metals creates a bonding alloy (eutectic phase), the thickness of which depends on the solubility of the elements present. This reactive layer becomes the brazing filler metal. It has a lower melting point than the parent materials.
This technique makes it possible to join metallic materials that are known to be difficult to join using conventional brazing, as well as metallic materials with ceramics.
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Transient Liquid Phase
Advantages and limitations of brazing
Bibliography
Standards and norms
- Welding, soldering, braze welding – Soldering, brazing and brazing filler metals – Classification, coding, reception. - NF A 81-362 - décembre 2013
- Welding and related techniques – Brazing ability – Definition and use of a variable clearance specimen. - NF A 89-410 - janvier 2017
- Essais destructifs des assemblages réalisés par brasage fort. - NF EN 12797 - septembre 2000
- Brazing – Filler metals....
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Welding Institute
ZI Paris Nord 2 – 90, rue des Vanesses
BP 51362 – 95942 Roissy Ch. De Gaulle Cedex, 93420 Villepinte
Brazing laboratory :
ZA Regional Airport
4, Rue Pilâtre de Rozier
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