Thermodynamic modeling of the Nb-B system
2007 (English)In: Intermetallics (Barking), ISSN 0966-9795, Vol. 15, no 8, 999-1005 p.Article in journal (Refereed) Published
In the present work, the Nb-B binary system was thermodynamically optimized. The stable phases in this system are BCC (niobium), Nb3B2, NbB, Nb3B4, Nb5B6, NbB2, B (boron) and liquid L. The borides Nb3B2, NbB, Nb3B4 and Nb5B6 and the B (boron) were modeled as stoichiometric phases and the liquid L, BCC (niobium) and NbB2 as solutions, using the sublattices model, with their excess terms described by the Redlich-Kister polynomials. The Gibbs energy coefficients were optimized based on the experimental values of enthalpy of formation, low temperature specific heat, liquidus temperatures and temperatures of invariant transformations. The calculated Nb-B diagram reproduces well the experimental values from the literature.
Place, publisher, year, edition, pages
2007. Vol. 15, no 8, 999-1005 p.
intermetallics, miscellaneous, phase diagrams, thermodynamic and thermochemical properties, phase diagram, prediction, heat-capacity, superconductivity, calorimetry, enthalpies, range, bor
IdentifiersURN: urn:nbn:se:kth:diva-16799DOI: 10.1016/j.intermet.2006.10.054ISI: 000248065300002ScopusID: 2-s2.0-34250208460OAI: oai:DiVA.org:kth-16799DiVA: diva2:334842
QC 201005252010-08-052010-08-05Bibliographically approved