Carbon – Tantalum – Zirconium

Bochvar, Nataliya

doi:10.1007/978-3-642-00771-2_3

Cited by 4 publications

(3 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…and predicted the presence of a broad miscibility gap between TaC and ZrC in Ta-Zr-C system [29]. Their works are briefly summarized in [11]. On the contrary, Markström et al [30] performed a thermodynamic assessment of Ta-Zr-C system solutions using ab initio calculations of the enthalpies for static lattices (at T=0 K) of the pure and mixed carbides and revealed that TaxZr1-xC carbides should be treated as ideal solid solutions.…”

Section: Gusev Et Al Used Calculated Exchange Energies In the Subregmentioning

confidence: 99%

“…Potential applications of UHTCs include hightemperature solar concentrators for renewable energy industry, barrier coatings, hard coatings [6][7][8][9]. TaC (Tm=3950°С) and ZrC (Tm=3420 °С) are among the most refractory compounds known today [10][11][12]. Tantalum carbide has outstanding mechanical properties -elastic modulus 540 GPa, hardness 25 GPa, bending strength 800 MPa, hightemperature hardness 6.0 GPa [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…No miscibility gap was observed.To summarize the discussion above, inFigure 1we provide different published versions of TaC-ZrC phase diagram. It is noteworthy that both the international database NIST and Springer Landolt-Börnstein compendium[11] currently use the version of TaC-ZrC diagram proposed by Gusev[29] (Fig. 1).…”

mentioning

confidence: 99%

See 2 more Smart Citations

Ab-initio modeling and experimental investigation of properties of ultra-high temperature solid solutions TaxZr1-xC

Vorotilo

Sidnov

Mosyagin

et al. 2019

Journal of Alloys and Compounds

View full text Add to dashboard Cite

Due to their high melting temperature, high-temperature oxidation resistance and outstanding mechanical properties, solid solutions TaxZr1-xC are a promising ultra-high temperature ceramic (UHTC). However, the accelerated knowledge-based development of UHTCs solid solutions requires reliable data regarding the properties of the solution phases in the whole interval of concentrations. In particular, there are contradictory reports regarding the existence of the miscibility gap in Ta-Zr-C system at the temperatures below 900 o С. In this work, we carry out the ab-initio calculation of the thermodynamic properties of TaxZr1-xC alloys and demonstrate that the decomposition of the solid solutions into TaC and ZrC should not occur. We synthesize single-phase specimens with the composition TaxZr1-xC (x=0.9, 0.8, 0.6, 0.3) by self-propagating hightemperature synthesis (SHS) and anneal it for 40 hours. We do not observe any sign of the decomposition of the solid solution during the annealing, corroborating the conclusions obtained in theoretical simulations.

show abstract

Section: Gusev Et Al Used Calculated Exchange Energies In the Subregmentioning

confidence: 99%