7440-33-7 Purity
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Specification
Severe plastic deformation produced by high-pressure torsion (HPT) in a Bridgman anvil is used to refine the metal structure. The effect of the initial {001} and {110} orientations of single crystal niobium and HPT temperature on the structural evolution during deformation of the Bridgman anvil was studied.
· HPT deformation of niobium results in a continuous change of structural state stages: cellu lar, mixed, and submicrocrystalline structure stages.
· The single crystal with the hard {001} orientation at the stage of the cellular structure undergoes fragmentation, which causes the discrete misorientation of the part of lowangle boundaries.
· With further deformation at room tempera ture, the structure is refined more slowly in single crys tals with a hard {001} orientation than in single crystals with a soft {110} orientation.
· Decreasing the temperature of HPT deformation to 80 K increases the refinement rate at the second and third stages and results in the formation of a structure with an average microcrystallite size of 50-40 nm.
The molecular formula of niobium is Nb.
The molecular weight of niobium is 92.90637 g/mol.
The IUPAC name of niobium is niobium.
The InChI of niobium is InChI=1S/Nb.
The InChIKey of niobium is GUCVJGMIXFAOAE-UHFFFAOYSA-N.
The Canonical SMILES of niobium is [Nb].
The CAS number for niobium is 7440-03-1.
Niobium has 0 hydrogen bond donor counts.
The topological polar surface area of niobium is 0-2.
Niobium has 1 covalently-bonded unit count.