Promising ultra-high-temperature ceramic materials for aerospace applications

Симоненко, Е. П.; Sevast’yanov, D. V.; Симоненко, Н. П.; Sevastyanov, V. G.; Кузнецов, Н. Т.

doi:10.1134/s0036023613140039

Cited by 129 publications

(50 citation statements)

References 157 publications

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“…As an analogy of ZrB 2 , HfB 2 has a higher melting point (3250°C) and superior oxidation resistance. Thus ZrB 2 -, HfB 2 -based materials are of high interest for aerospace applications [1][2][3]. However, the scarcity, high cost and disadvantage of high-density limit HfB 2 to be broadly applied.…”

Section: Introductionmentioning

confidence: 98%

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Synthesis of zirconium, hafnium and their ternary borides by a polymer complex route

Chen

Liu

Zhang

et al. 2015

J Sol-Gel Sci Technol

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Submicrometer (100-500 nm) zirconium diboride powders were synthesized by a polymer complex route using simple and mainly nontoxic starting reagents. In this aqueous process, chitosan was used as a coordinating polymer to immobilize the metal ion and boric acid in the molecular so as to inhibit the segregation of various components in the dried gel. This zirconium-based precursor (4 B/metal molar ratios) was thus completely transformed into ZrB 2 after 1400°C heat treatments. As a comparison, synthesis of zirconium diboride using phenolic resin with poor complexation ability was also conducted, and the results showed that the final products comprised of a mixture of boride and a considerable amount of carbide phase in spite of the excess of boron source. Moreover, HfB 2 and the ternary boride powders were also synthesized by the polymer complex method and had a submicrometer size; moreover, the ternary boride showed a single phase AlB 2 -type products. Thus, the polymer complex method was demonstrated to be a more effective method to synthesize boride particles. Graphical AbstractKeywords Submicrometer metal diboride powder Á Preceramic precursor Á Polymer complex route Á Intimate mixing Á Chitosan

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Section: Introductionmentioning

confidence: 98%

“…Among these borides, ZrB 2 has excellent high temperature corrosion resistance, as well as lower cost and broader availability [1][2][3]. As an analogy of ZrB 2 , HfB 2 has a higher melting point (3250°C) and superior oxidation resistance.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of zirconium, hafnium and their ternary borides by a polymer complex route

Chen

Liu

Zhang

et al. 2015

J Sol-Gel Sci Technol

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“…These studies were performed within the program devoted to the production of ultra-refractory carbides [26][27][28][29] as components of high-temperature materials. There are several papers [30][31][32] concerning application of sol-gel processes for the preparation of porous (density: 0.1-0.3 g/ cm 3 ), including mesoporous, samples of SiC ceramics. However, expensive silicon alkoxides or alkylalkoxides were used in such cases as sources of silicon.…”

Section: Introductionmentioning

confidence: 99%

“…Owing to high decomposition temperature, good mechanical characteristics, chemical inertness and the highest oxidation resistance among refractory carbides, SiC is the main and the most important component of many composite and ceramic materials for high-temperature applications [1][2][3][4][5][6][7][8][9]. Silicon carbide is used for production of wear-resistant parts due to its high hardness [10,11].…”

Section: Introductionmentioning

confidence: 99%

Preparation of high-porous SiC ceramics from polymeric composites based on diatomite powder

Симоненко

Zharkov

et al. 2014

J Mater Sci

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High-porous SiC ceramics (density 0.50-0.58 g/cm 3 , porosity 82-84 %, compressive stress at break 3.7-6.3 MPa) was prepared by means of polymeric technology and natural raw material (diatomite powder, ''Biosilica'' grade) at the temperature of carbothermal synthesis (1400°C). It was shown that the main phase was silicon carbide with a small (\5 %) impurity of FeSi; SiC crystallite size was found to be 23-30 nm. Using scanning electron microscopy, X-ray computerized microtomography, and dynamic light scattering in aqueous suspensions of powders obtained at ultrasonic exposure, it was shown that SiC nanoparticles in the samples were aggregated to a great extent. The degree of aggregation strongly depends on SiO 2 -C ratio in the starting samples.

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“…However, gaseous products like CO and CO 2 are inevitably formed during oxidation, which leads to porous oxide scales that delaminate and spall. The major oxide of TaC is Ta 2 O 5 , which has a melting point of~1900 • C, lower than the desired application temperature of 2000 • C or more [5][6][7]. As a result, the resultant oxide would melt and lose its structural integrity, and fail catastrophically.…”

Section: Introductionmentioning

confidence: 99%

Thermal Analysis of Tantalum Carbide-Hafnium Carbide Solid Solutions from Room Temperature to 1400 °C

et al. 2017

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Abstract:The thermogravimetric analysis on TaC, HfC, and their solid solutions has been carried out in air up to 1400 • C. Three solid solution compositions have been chosen: 80TaC-20 vol % HfC (T80H20), 50TaC-50 vol % HfC (T50H50), and 20TaC-80 vol % HfC (T20H80), in addition to pure TaC and HfC. Solid solutions exhibit better oxidation resistance than the pure carbides. The onset of oxidation is delayed in solid solutions from 750 • C for pure TaC, to 940 • C for the T50H50 sample. Moreover, T50H50 samples display the highest resistance to oxidation with the retention of the initial carbides. The oxide scale formed on the T50H50 sample displays mechanical integrity to prevent the oxidation of the underlying carbide solid solution. The improved oxidation resistance of the solid solution is attributed to the reaction between Ta 2 O 5 and HfC, which stabilizes the volume changes induced by the formation of Ta 2 O 5 and diminishes the generation of gaseous products. Also, the formation of solid solutions disturbs the atomic arrangement inside the lattice, which delays the reaction between Ta and O. Both of these mechanisms lead to the improved oxidation resistances of TaC-HfC solid solutions.

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Promising ultra-high-temperature ceramic materials for aerospace applications

Cited by 129 publications

References 157 publications

Synthesis of zirconium, hafnium and their ternary borides by a polymer complex route

Synthesis of zirconium, hafnium and their ternary borides by a polymer complex route

Preparation of high-porous SiC ceramics from polymeric composites based on diatomite powder

Thermal Analysis of Tantalum Carbide-Hafnium Carbide Solid Solutions from Room Temperature to 1400 °C

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