Synthesis of fine dispersed titanium diboride from nanofibrous carbon

Krutskii, Yu. L.; Bannov, Alexander G.; Antonova, E.V.; Соколов, В. В.; Pichugin, Andrey; Максимовский, Е. А.; Krutskaya, T. M.; Netskina, O.V.; Батаев, И. А.

doi:10.1016/j.ceramint.2016.11.146

Cited by 16 publications

(4 citation statements)

References 28 publications

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“…To do experiments on the synthesis of carbides and diborides of titanium, vanadium, chromium and zirconium, nanofibrous carbon (NFC) was used as a carbon material characterized by a high specific surface area (~150 m 2 /g) and a low content of impurities (at the level of 1 wt.%). The synthesis of titanium, vanadium, chromium and zirconium diborides was carried out in an argon protective atmosphere, which prevented undesirable nitriding of the boron-containing reagent -boron carbide [1].…”

Section: Methodsmentioning

confidence: 99%

Carbothermal and boron carbide reduction of oxides of some transition metals

et al. 2021

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The study presents a possible mechanism to produce carbides and diborides of transition metals, such as titanium, vanadium, chromium and zirconium. The carbothermal synthesis of transition metal carbides has defined the direct dependence between the thermodynamic stability of oxides and the temperature range of the reduction onset (the stronger the oxide, the higher the value of the temperature is). It reaches 2000-2100, 1500-1600, 1300-1400 and 2100-2200°C for such carbides as TiC, VC0,88, Cr3C2 and ZrC respectively. The same dependence has not been found for the diborides of these metals. Optimum synthesis temperatures for all these compounds lie in the range of 1600-1700 °C. This viable method to produce transition metal carbides consists in the transfer of vaporous higher and lower oxides. Diborides preparation involves the transfer of oxides and boron vapors onto the surface of the carbon material with the subsequent chemical interaction. In the case of carbide-boron reduction of zirconium oxide in excess of boron carbide, the reaction product will be a composite material (B4C – ZrB2). The ceramics based on this composite possesses high performance properties.

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Section: Methodsmentioning

confidence: 99%

Carbothermal and boron carbide reduction of oxides of some transition metals

et al. 2021

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“…They directly synthesized TiB2 powders with an average particle size of 0.5 to 1.0 µm using the boron/carbothermal reduction method at 1600°C for 30 min. Krutskii [61] et al used B4C and nanofiber carbon to reduce TiO2 under argon protection to prepare TiB2 powders with an average particle size of 7.4~8.0 µm. The powders were mainly aggregated and contained a small amount of impurities.…”

Section: Reaction Typementioning

confidence: 99%

Review on the Development of Titanium Diboride Ceramics

Lv,

Yin,

Yang

et al. 2024

Recent Prog Mater

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Titanium diboride (TiB2) materials have garnered significant attention due to their remarkable comprehensive properties. They offer potential applications in high-temperature structural materials, cutting tools, armor, electrodes for metal smelting, and wear-resistant parts. However, due to the low self-diffusion coefficient, the TiB2 exhibits poor sinterability, excessive grain growth at elevated temperatures, and inadequate oxidation resistance, limiting its wide application. Therefore, many research works are devoted to processing TiB2 at a lower sintering temperature and improving the properties through various sintering additives and more advanced techniques. This article comprehensively reviews the multiple synthesis methods and sintering technologies of TiB2, and at the same time, critically discusses the impacts of sintering additives and reinforcing agents on densification, microstructure, and various properties, including those at high temperatures, and finally predicts the future development of TiB2 composite materials.

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“…Кроме того, TiB 2 достаточно устойчив при нагревании на воздухе и до 800 °С не окисляется. При температуре 900 °С он незначительно окисляется с образованием стекловидной защитной пленки на поверхности материала, препятствующей его дальнейшему окислению [8].…”

Section: введение введениеunclassified

Synthesis of B4C–TiB2 composition powder mixtures by carbidobor reduction using nanofibrous carbon for ceramic fabrication

Gudyma,

Krutskii,

Maximovskiy

et al. 2023

Izv. VUZ. Poroshk. Met.

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The results of the researching process of obtaining composition powder material B4C–TiB2 by carbide reduction of titanium dioxide, using carbon reducing agent – carbon nanofibers, are presented. Furthermore, the results of studying of some properties of ceramics made using the synthesized powder are presented. The synthesis of composite materials was carried out in an induction crucible furnace for 20 min in the temperature range of 1200–1900 °C in an argon atmosphere. It has been established that the optimum temperature of the synthesis is 1650 °C, irrespective of the batch composition. The characteristics of the composite powders containing 10–30 mol. % of the TiB2 phase have been studied. X-ray electron microscopy has revealed that the particles of the powder are predominantly aggregated. There are two peaks in the particle size distribution histograms. The part of the histogram with a smaller particle size mainly characterizes the B4C phase. The part of the histogram with a larger particle size characterizes the TiB2 phase. The average particle size of the B4C phase is in the range of 5.3–5.5 µm, and that of the TiB2 phase is in the range of 33.6–41.9 µm. The average size of 50 % of composite powder’s particles for these contents does not exceed 13.4 μm. The surface area of the samples does not exceed 5 m2/g. The oxidation of the composite powder materials by atmospheric oxygen begins at a temperature of approximately 500 °C. At the same time, when the temperature reaches 1000 °C, no more than 45 wt. % of the studied powders is oxidized. Ceramics made with the synthesized powder mixture B4C + 30 mol. % TiB2 by hot pressing has shown rather high values of relative density (99.0±1.1 %) and fracture toughness (5.0±0.2 MPa∙m0.5).

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Synthesis of fine dispersed titanium diboride from nanofibrous carbon

Cited by 16 publications

References 28 publications

Carbothermal and boron carbide reduction of oxides of some transition metals

Carbothermal and boron carbide reduction of oxides of some transition metals

Review on the Development of Titanium Diboride Ceramics

Synthesis of B<sub>4</sub>C–TiB<sub>2</sub> composition powder mixtures by carbidobor reduction using nanofibrous carbon for ceramic fabrication

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