Thermodynamic assessment of the C–Zr–Nb ternary system

Zeng, Yiyu; Zhou, Panyue; Du, Yong

doi:10.1016/j.calphad.2018.02.009

Cited by 12 publications

(1 citation statement)

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“…It is of interest to establish a thermodynamic database for Ti(C,N)-based cermets to guide the manufacturing process or design advanced cermet materials [14,15] . The establishment of such a thermodynamic database requires the experimental data of the Mo-Ti-Zr [16] and some relevant systems [17][18][19][20] . The knowledge of phase equilibria and thermodynamic modelling of the Mo-Ti-Zr system is important to perform TZM or Ti-based biomedical alloy design and establish a thermodynamic database for Ti(C,N)-based cermets.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic description and phase selection for the Mo–Ti–Zr biomedical alloys

Zhang

Zhou

et al. 2020

Calphad

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Thermodynamic information of the Mo-Ti-Zr ternary system is extremely useful to provide guidance for biomedical alloy development. In the present work, the experimental data available from the literature were critically reviewed, and a thermodynamic modeling of the Mo-Ti-Zr system was performed using the CALPHAD (CALculation of PHAse Diagram) approach. The solution phases including liquid, bcc_A2 (β) and hcp_A3 (α) were modelled by the substitutional solution model, and the laves_C15 phase was modelled using a two sublattice model. In the Mo-Ti-Zr system, there is no ternary compound. A set of self-consistent thermodynamic parameters were developed. Comprehensive comparisons between the calculated and measured phase diagrams suggest that the experimental information is satisfactorily accounted for by the present thermodynamic modelling. The discrepancies between the calculated and measured phase equilibria have been well explained in this work. With regard to the β phase, the miscibility gap and related phase relations are well described by the present calculation. The liquidus projection and Scheil solidification simulation were generated using the present thermodynamic parameters. The presently calculated phase diagrams of the Mo-Ti-Zr alloys can be used in the biomedical field. Based on the calculations in the present work, two guidelines were formulated to avoid the laves phase formation in these frequently studied Mo-Ti-Zr biomedical alloys.

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