A thermodynamic modeling of the C–Cr–Ta ternary system

Sha, Chunsheng; Bu, Mengjie; Xu, Honghui; Du, Yong; Wang, Shequan; Wen, Guangrui

doi:10.1016/j.jallcom.2011.01.202

Cited by 16 publications

(3 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Starting from the constituent binary systems, the Cr−X (X -Hf, Nb, Zr, Ti) [19,20,23,[42][43][44] , they present (Cr), (X)-bcc and the intermetallics Laves C14 [19,20,42,44] , C15 [23,[42][43][44] and C36 [42,43] . The liquidus ↔ solidus reactions are L ↔ (bcc) [19,20,23,[42][43][44][45] , the congruent L ↔ C14 [19,20,42,44] and L ↔ C15 [23] , the eutectic L ↔ C14 + (bcc) [19,20,44] , L ↔ C15 + (bcc) [23,42] and L ↔ C36 + (bcc) [42] . The Cr−Ti [43] , specifically, presents the solidus ↔ solidus (Cr,Ti)-ht (bcc) ↔ C14 and the eutectoid (Cr,Ti)-ht ↔ C15 + (Ti)-rt hcp.…”

Section: Cr-hf-nb Liquidus Projectionmentioning

confidence: 99%

“…In addition, the knowledge of specific systems, such as Cr−X (X -Ta, Ti, Zr) [42][43][44][45] , Hf−X (X -Ta, Ti) [46,47] , Zr−X (X -Nb, Ti) [48,49] , Cr−Nb/Hf−X (X -Al, Ta, Ti, Zr) [50][51][52][53][54][55][56][57][58][59] (Figures 5 and 6) can contribute to understanding the Cr−Hf−Nb system, due to important similarities, such as the presence of intermetallic Laves phases.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental Study of the Cr-Hf-Nb System: Liquidus Projection and 1200 °C Isothermal Section

Gigolotti

Silva

Coelho

et al. 2020

J. Phase Equilib. Diffus.

View full text Add to dashboard Cite

Phase equilibria data from ternary Cr-Nb-X (X = Hf, Ta, Ti, Zr) systems are relevant to the development of Niobium-silicide based composites for use in jet engines. Such systems present at several temperatures a pseudo-binary of Cr2Nb-Cr2X Laves phases. This work presents the experimentally determined liquidus projection and the 1200 °C isothermal section for the Cr-Hf-Nb system based on microstructural characterization of as-cast and heat-treated alloys. The microstructural characterization using X-ray diffractometry, scanning electron microscopy and electron probe microanalysis showed four eutectic-type monovariant reactions and two class II invariant reactions in the liquidus projection. The

show abstract

Section: Cr-hf-nb Liquidus Projectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Study of the Cr-Hf-Nb System: Liquidus Projection and 1200 °C Isothermal Section

Gigolotti

Silva

Coelho

et al. 2020

J. Phase Equilib. Diffus.

View full text Add to dashboard Cite

show abstract

“…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.

Self Cite

View full text Add to dashboard Cite

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.

show abstract