The Al–B–Nb–Ti system

Witusiewicz, V.T.; Bondar, A. А.; Hecht, U.; Rex, S.; Velikanova, Т. Ya.

doi:10.1016/j.jallcom.2007.02.030

Cited by 32 publications

(19 citation statements)

References 15 publications

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“…This is consistent with EPMA measurements reported in [5,14] and with our own EDS measurements. It also corresponds to the homogeneity ranges reported for isostructural TiAl 3 [42] and NbAl 3 [43] phases. From Fig.…”

Section: Phase Equilibriasupporting

confidence: 82%

“…Taking into account EPMA measurements in [5,14], which are in good agreement with data for isostructural TiAl 3 [42] and NbAl 3 [43], the homogeneity range of 3 may be estimated to be about 0.5-1 at.% Ta. Subramanian et al [14] proposed that the 3 homogeneity range is somewhat shifted from the stoichiometry TaAl 3 to about 24 at.% Ta.…”

Section: Literature Data On Crystal Structure and Phase Equilibriasupporting

confidence: 78%

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Experimental study and thermodynamic re-assessment of the binary Al–Ta system

et al. 2010

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Section: Phase Equilibriasupporting

confidence: 82%

Section: Literature Data On Crystal Structure and Phase Equilibriasupporting

confidence: 78%

Experimental study and thermodynamic re-assessment of the binary Al–Ta system

et al. 2010

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“…Concerning the Nb-Ti-B ternary system, there is some experimental information on phase equilibria by Kuz'ma 39) and Borisov et al 40) A thermodynamic analysis of the entire ternary system was carried out by Witusiewicz et al 41) Kuz'ma 39) reported an isothermal section at 1673 K examined using the X-ray diffraction method. The isothermal section is composed of the Nb 3 B 2 , NbB, TiB, Nb 3 B 4 , and (Nb,Ti)B 2 phases, and no ternary compound exists.…”

Section: The Nb-ti-b Ternary Systemmentioning

confidence: 99%

“…In Fig. 7(a) to (f), the calculated energies of formation of the six pseudo-binary sections were compared with those obtained using the conventional CALPHAD approach 41) depicted by the dashed lines. The solid lines in these figures represent the results obtained by the present thermodynamic analysis.…”

Section: The Nb-ti-b Ternary Systemmentioning

confidence: 99%

Thermodynamic Analysis of the Nb–Ti–B Ternary Phase Diagram

2009

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A thermodynamic analysis of the Nb-Ti-B ternary system was carried out by estimating the unknown thermodynamic properties of binary and ternary borides by using a first-principles method. The calculated value for the binary TiB 2 phase was in reasonable agreement with those found by experiment. Due to a lack of experimental values concerning thermodynamic properties of the ternary system, the formation enthalpies for the Nb 3 B 2 -Ti 3 B 2 , NbB-TiB (Cmcm), NbB-TiB (Pnma), Nb 5 B 6 -Ti 5 B 6 , Nb 3 B 4 -Ti 3 B 4 , and NbB 2 -TiB 2 pseudo-binary sections were also determined by constructing various kinds of superstructures for binary borides. The thermodynamic functions determined using these theoretical values, as well as the available experimental information on the phase fields, successfully revealed the phase equilibria in the Nb-Ti-B ternary system across the entire composition and all temperature ranges.

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“…Designing alloy compositions and processing conditions require reliable phase diagram data of corresponding ternary systems. Lately, a lot of efforts have been made to determine the hightemperature phase equilibria in ternary TieAleNb [3], which includes the key binary TieAl system [4]. Based on recent experimental data the thermodynamic description of the AleTa system has been also reassessed [5].…”

Section: Introductionmentioning

confidence: 99%