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Thermodynamic modeling of the NbeB system

Peçanha, Rockfeller Maciel and Ferreira, Flàvio and Carvalho Coelho, Gilberto and Nunes, Carlos Angelo and Sundman, Bo Thermodynamic modeling of the NbeB system. (2007) Intermetallics, vol. 15 (n° 8). pp. 999-1005. ISSN 0966-9795

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Official URL: http://dx.doi.org/10.1016/j.intermet.2006.10.054

Abstract

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.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Intermetallics website : http://www.sciencedirect.com/science/journal/09669795
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Universidade de São Paulo - USP (BRAZIL)
Other partners > Universidade Federal Fluminense - UFF (BRAZIL)
Other partners > Royal Institute of Technology – KTH (SWEDEN)
Laboratory name:
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Deposited By:Celine Cabaup

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