The high-temperature properties and crystallographic behaviours of tantalum carbonitrides were analysed using advanced laser melting techniques. The focus lies on deciphering the phase evolution, melting points, and solidification structures which are essential for applications in ultra-high temperature environments. Electron microscopy investigations reveal structured transformations and accurate assessment of phase stability. The solidification temperature of TaC was reassessed to higher temperature, i.e. 4520 ± 73 K, by using an emissivity of ε = 0.24. The tetragonal Ta2CxNy phase (with x = 1.5 and y = 0.5) also exhibits remarkable thermal resilience, with a solidification temperature of 4401 ± 69 K, with ε = 0.27, making it a very interesting candidate for advanced thermal applications. The work highlights the potential of carbonitride systems to redefine the limits of materials and serves as a reference for materials innovation in extreme environments.
MANAUD Jeremie;
ROBBA Davide;
NAKAJO Arata;
CORNIANI Enrico;
HAEHNER Peter;
COLOGNA Marco;
VLAHOVIC Luka;
2026-04-14
ELSEVIER B.V.
JRC143638
2590-1230 (online),
https://www.sciencedirect.com/science/article/pii/S2590123026014568,
https://publications.jrc.ec.europa.eu/repository/handle/JRC143638,
10.1016/j.rineng.2026.110422 (online),
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