Effect of Chromium on the Oxidation Resistance of Titanium Carbide

Roach, John D.

doi:10.1149/1.2778124

Cited by 19 publications

(1 citation statement)

References 3 publications

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“…1D. Also, no trace of Cr was detected in the TiC layer and vice versa, suggesting that no diffusion of Cr in the TiC occurred at 950 °C, regardless of the nonnegligible solubility of Cr 3 C 2 in TiC at high temperatures (>1,300 °C) (31,32). These results indicate that complex multilayer carbide coatings can be formed using a single-step molten salt process at a low temperature (950 °C).…”

Section: Resultsmentioning

confidence: 84%

Spontaneous formation of multilayer refractory carbide coatings in a molten salt media

Constantin

Fan

Pouey

et al. 2021

Proc. Natl. Acad. Sci. U.S.A.

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Refractory materials hold great promise to develop functional multilayer coating for extreme environments and temperature applications but require high temperature and complex synthesis to overcome their strong atomic bonding and form a multilayer structure. Here, a spontaneous reaction producing sophisticated multilayer refractory carbide coatings on carbon fiber (CF) is reported. This approach utilizes a relatively low-temperature (950 °C) molten-salt process for forming refractory carbides. The reaction of titanium (Ti), chromium (Cr), and CF yields a complex, high-quality multilayer carbide coating composed of 1) Cr carbide (Cr3C2), 2) Ti carbide, and 3) Cr3C2 layers. The layered sequence arises from a difference in metal dissolutions, reactions, and diffusion rates in the salt media. The multilayer-coated CFs act as a permeable oxidation barrier with no crystalline degradation of the CFs after extreme temperature (1,200 °C) and environment (oxyacetylene flame) exposure. The synthesis of high-quality multilayer refractory coating in a fast, efficient, easy, and clean manner may answer the need for industrial applications that develop cheap and reliable extreme environment protection barriers.

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Section: Resultsmentioning

confidence: 84%