Thermodynamic evaluation of the C–Ta–Ti system and extrapolation to the C–Ta–Ti–N system

Peng, Yingbiao; Zhou, Panyue; Du, Yong; Chang, Keke

doi:10.1016/j.ijrmhm.2013.03.012

Cited by 22 publications

(2 citation statements)

References 20 publications

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“…In the present modeling, the Gibbs energy expressions for pure Ti, Ta and Sn are taken from the SGTE compilation by Dinsdale [ 18 ]. For the Ti-Ta binary system, the thermodynamic description from Saunders [ 12 ] have been have been applied in the development of thermodynamic database for cemented carbides [ 11 , 19 ], which was considered to be reliable and thus adopted in the present work. The first assessment of the Ti-Sn binary system is from the work by Hayes [ 20 ].…”

Section: Thermodynamic Modelsmentioning

confidence: 99%

Thermodynamic Assessment of Bio-Oriented Ti-Ta-Sn System

Ling

Peng

et al. 2021

Materials

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The alloying elements Ta and Sn can effectively increase the stability of β-bcc phase, reduce Young’s modulus and improve the shape-memory property of Ti-based biomedical alloys. The development of the thermodynamic database for Ti-based biomedical alloys promises thermodynamic predictions in composition design and process optimization. In this work, one key sub-ternary Ti-Ta-Sn system has been thermodynamically assessed based on critical evaluation of experimental phase equilibria. A self-consistent thermodynamic description for the Ti-Ta-Sn system including one ternary compound Ti36Ta28Sn36 and six binary compounds considering the solubility of the third element has been obtained. Two isothermal sections at 973 and 1173 K and the liquidus projection have been calculated. Comparisons between the calculated and experimental phase equilibria validate the reliability of the present thermodynamic description. The influence of Ta and Sn contents on the transformation temperature and amount of α_hcp-Ti phase in β_bcc-(Ti,Ta) phase has been investigated based on thermodynamic calculations. The solidified phases in Ti-20Ta-xSn (x = 5, 15 and 25 at.%) as-cast alloys have been thermodynamically calculated based on Scheil solidification simulations. The presently developed thermodynamic description of the Ti-Ta-Sn system would promote the establishment of muti-component Ti-based thermodynamic database and guide the development of Ti-based alloys.

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Section: Thermodynamic Modelsmentioning

confidence: 99%

Thermodynamic Assessment of Bio-Oriented Ti-Ta-Sn System

Ling

Peng

et al. 2021

Materials

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“…Using the CALPHAD method, [21] the establishment of the thermodynamic database is based on previous thermodynamic descriptions for all of the binary systems and most of the ternary systems reported in the literature. Some of the ternary systems are assessed according to experimental data including the C-Cr-Ta, [22] C-Ta-Ti, [23] C-Ti-Nb [24] and Co-Cr-Ti [25] systems. The description on the established thermodynamic database is given elsewhere.…”

Section: Brief Description Of the Thermodynamic Databasementioning

confidence: 99%

Experimental Investigation and Computer Simulation of Gradient Zone Formation in WC-Ti(C,N)-TaC-NbC-Co Cemented Carbides

Zhang

Peng

Zhou

et al. 2013

J. Phase Equilib. Diffus.

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The thermodynamic and diffusion databases for multi-component W-C-Co-Ti-Ta-Nb-N cemented carbides have been developed through a combination of experimental, theoretical and assessment work. Using the CALPHAD approach, the thermodynamic database has been established based on the literature information and experimental investigations. The diffusion database contains the atomic mobility parameters for different diffusing elements in liquid, which were calculated by a modified Sutherland equation. According to the present thermodynamic and diffusion databases, a gradiently sintered WC-Ti(C,N)-(Ta,Nb)C-Co cemented carbides has been designed and prepared. Scanning electron microscopy was employed to investigate the microstructure of the gradient zone, and electron probe microanalysis was used to determine the concentration profiles and distributions of the elements. The gradient zone formation of the cemented carbides was then simulated by DICTRA, and the simulation results show a good agreement with the experimental results.

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