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  Top » Catalog » Metal Beads » Handmade Metal Beads & Components » Niobium Findings by Marti Brown

Niobium Findings by Marti Brown

Niobium

(Nb) is a pure element originally called columbium. Columbium was found to be two separate metals existing in the same ore; niobium and tantalum. Pure niobium is soft, ductile and malleable and easily fabricated by hammering, sawing, filing, bending, etc. Niobium absorbs electrons from oxygen, carbon and nitrogen forming alloys at temperatures over 600¡. It cannot be soldered due to this reactivity. Niobium is resistive to acids and alkalines, making it hypoallergenic.

Niobium alloys are used by the aerospace industry where heating takes place in space. Leading edges for re-entry vehicles, turbine blades and vanes are some of their uses.

ribbon image

Coloring Niobium

Electric current in the anodizing bath causes oxygen to separate from the liquid. It combines with niobium to form a layer of niobium oxide (NbO2). The higher the voltage the thicker the oxide formed. The thin oxide is harder than the pure metal, but it can be easily scratched. The oxide is transparent. When light strikes the transparent oxide, some of the rays are reflected off the oxide and some pass through to reflect off the base metal. The rays blend with each other slightly out of phase. They cancel or augment producing color to your eye. The thickness of the layer determines what color is seen. Pumiced, sandblasted and lightly sanded surfaces scatter light and increase the viewing angle making the colors appear more vibrant.

color chart
Niobium Findings by Marti Brown
Niobium Ear Wires
Niobium Ear Wires
Niobium Headpins
Niobium Headpins
Niobium Jump Rings
Niobium Jump Rings
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