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Zirconium Niobium alloys

zirconium niobium alloy rod

Properties of Zr-Nb alloy

Niobium(Nb) has outstanding strengthening effect on Zirconium(Zr). There is a stable beta phase during quenching. The increase in strength of Zr-Nb alloy is determined by the transition from beta solution to martensite. As content of Nb increases, more beta phase is fixed, and the strength decreases. Nb can eliminate the harm of C, Ti, Al and other impurities to Zirconium’s corrosion resistance and reduce the hydrogen absorption.

zirconium niobium alloy sheet

Like other Zirconium alloys, the corrosion properties of Zr-1Nb are related to the microstructure after heat treatment.
After quenching and aging of Zr-2.5Nb, the β-Nb precipitate phase was precipitated from supersaturated α-Zr, which was favorable for improving corrosion resistance when it was small and uniformly distributed.

Application of Zr-Nb alloy

Zirconium Niobium alloy is a heat treatment alloy, quenching - cold aging treatment can also improve its corrosion resistance. Therefore, it has wide applications in chemical industry.
Zr-Nb alloys are also used as cladding materials for heavy water reactors, nuclear power plants and submarine reactors.
Considering the influence of Nb content and processing technology on the corrosion resistance of Zr-Nb binary alloy, Zr-1Nb and Zr-2.5Nb binary alloy, as well as Zr-0.3 Nb-X, Zr-0.2 Nb-X, Zr-1.5 Nb-X and other multi-element alloys have been mainly studied and developed in various countries.

Flake curve of Zirconium Niobium alloy oxide film