Wetting and Reactivity of Active Metal Braze Alloys on Tungsten Carbide
- Dr. Alan Meier - Advisor
- Montana Tech SURF program - Funding
- Gary Wyss – Assistance with scanning electron microscope
- Ronda Coguill – Assistance with vacuum furnace
- Dr. William Gleason – Assistance with scanning electron microscopes and vacuum furnace
Tungsten carbide is useful because of its hardness and strength. Joining of dissimilar materials especially non-metallic materials is very challenging. Active metals such as titanium can be added to a ductile filler metals such as copper to get wetting via a reduction reaction.
All alloy conditions wet the tungsten carbide/cobalt substrates. Two different interfacial reaction types were observed: dissolution and reduction reactions. An important issue has been identified: the braze interface reactions change the chemistry of the braze alloy which change the interaction between the braze alloy and the other material substrate.