Interdiffusion of niobium and some refractory metals

Prokoshkin, D.A.; Васильева, Е. В.; Vergasova, L.L.

doi:10.1007/bf00653142

Cited by 3 publications

(1 citation statement)

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“…The W-Mo system is comparable to Nb-W in that both systems have total solid solubility between constituents; however, the melting point gap is much smaller between W and Mo than it is between Nb and W. Short dendrites of W in the as-built state indicate that limited diffusion occurred during fabrication, suggesting that complete homogenization can be attained with melting point gap mitigation. This limited diffusion has previously been reported by Prokoshkin et al who found that W concentration decreases rapidly along the gradient at the Nb/W interface after heat treatment of 100 h at 1300 • C [38].…”

Section: Heat Treatments and Diffusionsupporting

confidence: 83%

Electron Beam Melting of Niobium Alloys from Blended Powders

et al. 2021

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Niobium-based tungsten alloys are desirable for high-temperature structural applications yet are restricted in practice by limited room-temperature ductility and fabricability. Powder bed fusion additive manufacturing is one technology that could be leveraged to process alloys with limited ductility, without the need for pre-alloying. A custom electron beam powder bed fusion machine was used to demonstrate the processability of blended Nb-1Zr, Nb-10W-1Zr-0.1C, and Nb-20W-1Zr-0.1C powders, with resulting solid optical densities of 99+%. Ultimately, post-processing heat treatments were required to increase tungsten diffusion in niobium, as well as to attain satisfactory mechanical properties.

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Section: Heat Treatments and Diffusionsupporting

confidence: 83%