The Al–B–Nb–Ti system

The Al–B–Nb–Ti system

“…They presented phase equilibria at temperatures close to melting/solidification and also re-examined the isothermal section at 1673 K. [7,8] confirmed the data of [12,13,15] Table 1 Summary of thermodynamic parameters for the phases of the ternary B-Nb-Ti system obtained in this work, that complement the parameter set for the constituent binary systems given in [1,2] (all values are given in SI units (J, mol, K) and for one formula unit) system. In [8] the XRD analysis of the as-cast metal-boride alloys allowed to identify metastable ␣ and phases, which were earlier found in the binary constituent system Nb-Ti [3,16].…”

“…The thermodynamic descriptions of the constituent binary systems B-Nb and B-Ti have been presented in the first part of the work [1]. The third binary system Nb-Ti was modelled earlier [2][3][4].…”

“…As exposed in first part of the work [1] the knowledge of phase equilibria and thermodynamic properties of the Al-B-Nb-Ti system is of high technological interest, especially with regard to niobium containing gamma TiAl alloys refined by boron additions that are considered to be attractive materials for both aero-engine and automotive applications. The ternary B-Nb-Ti system is one constituent system from the above mentioned quaternary system and its thermodynamic description is crucial for the development of a reliable thermodynamic Al-B-Nb-Ti database.…”

“…The ternary B-Nb-Ti system is one constituent system from the above mentioned quaternary system and its thermodynamic description is crucial for the development of a reliable thermodynamic Al-B-Nb-Ti database. The present paper reports on the thermodynamic description of the entire ternary system B-Nb-Ti by the CALPHAD approach, based on descriptions of the constituent binaries from [1,2] and experimental information on phase equilibria in the ternary system. * Corresponding author.…”

Titanium-boride eutectic materials: Structure of titanium-rich Ti-Ge-B alloys and phase equilibria at crystallization temperatures

“…The current Ti-B phase diagram [11,12] differs from that from the handbooks [5,10] only by temperatures of some invariant equilibria. In this paper, we use the Ti-B phase diagram based on the thermodynamic analysis [12], excluding the eutectic between (βTi) and TiB at 1504°C and 7.5 at.% B, which we revealed earlier by experiment [13].…”