The air oxidation resistance of fused titanium and zirconium carbides in their regions of homogeneity

Stepanchuk, A. N.; Trukhan, S. G.; Shlyuko, V. Ya.

doi:10.1007/bf01661238

Cited by 2 publications

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“…However, with further reduction in the carbon content, the OOT did not increase further. Stepanchuk et al 42 . reported that the Ti oxide does not provide adequate protection when the oxidation temperature is higher than 800°C.…”

Section: Resultsmentioning

confidence: 99%

“…However, with further reduction in the carbon content, the OOT did not increase further. Stepanchuk et al 42 reported that the Ti oxide does not provide adequate protection when the oxidation temperature is higher than 800 • C. Moreover, Webb et al 43 found that TiC 0.63 is oxidized more rapidly than near-stoichiometric TiC at 1000 • C. The OOTs of both Zr 0.8 Ti 0.2 C 0.75 and Zr 0.8 Ti 0.2 C 0.7 were lower than that of Zr 0.8 Ti 0.2 C 0.8 , suggesting that a carbon concentration x = 0.8 improved the OOT of (Zr,Ti)C x . Because Zr 0.8 Ti 0.2 C 0.8 was found to possess a high OOT, its phase evolution during oxidation was investigated by isothermal oxidation from 200 to 900 • C in N 2 -20-vol.% O 2 .…”

Section: Oxidation Behavior Of (Zrti)c Xmentioning

confidence: 99%

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Mechanisms responsible for enhancing low‐temperature oxidation resistance of nonstoichiometric (Zr,Ti)C

et al. 2022

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A series of (Zr,Ti)Cx (x = 0.7–1.0) samples were fabricated by a modified spark plasma sintering apparatus to investigate the effects of carbon concentration and Ti substitutions on the oxidation behavior. Crushed powders of (Zr,Ti)Cx were oxidized in lab air (N2–20‐vol.% O2) from room temperature to 900°C. The results indicated that Zr0.8Ti0.2C0.8, with a nominal carbon concentration x = 0.8, displayed good oxidation resistance, which was attributed to the formation of dense t‐(Zr,Ti)O2 oxide solid solution. During the oxidation of (Zr,Ti)Cx, Ti substitutions for Zr enhanced the outward diffusion of carbon, enabling a uniform carbon layer and a Zr–Ti–C–O layer on the surface of carbides. The formed carbon layer improved the oxidation resistance of (Zr,Ti)Cx below 550°C, where carbon is relatively oxidation resistant. Increasing the Ti concentration was found to enhance the oxidation resistance of (Zr,Ti)Cx with an increased oxidation onset temperature (672 ± 2°C for Zr0.8Ti0.2C0.8).

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Section: Resultsmentioning

confidence: 99%

Section: Oxidation Behavior Of (Zrti)c Xmentioning

confidence: 99%