The kinetics and mechanism of combusted Zr–B–Si mixtures and the structural features of ceramics based on zirconium boride and silicide

Pogozhev, Yu. S.; Iatsyuk, I.V.; Potanin, A. Yu.; Левашов, Е. А.; Новиков, А. В.; Кочетов, Н. А.; Kovalev, D. Yu.

doi:10.1016/j.ceramint.2016.07.157

Cited by 18 publications

(6 citation statements)

References 29 publications

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“…Among high-temperature materials, transition metal silicide (TMS) is a very promising high-temperature structural material, which has a stronger development prospect than the traditional nickel-based materials [1][2][3][4][5][6]. In recent years, TMS has received more and more attention because of its excellent thermoelectric performance, low cost and good physical and chemical properties [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

The vacancy defects and oxygen atoms occupation effects on mechanical and electronic properties of Mo₅Si₃ silicides

Chen

Zhang

Yang

et al. 2021

Commun. Theor. Phys.

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Improving brittle behavior and mechanical properties is still a big challenge for high-temperature structural materials. By means of first-principles calculations, in this paper, we systematically investigate the effect of vacancy and oxygen occupation on the elastic properties and brittle-or-ductile behavior on Mo5Si3. Four vacancies (Si–Va1, Si–Va2, Mo–Va1, Mo–Va2) and oxygen occupation models (O–Mo1, O–Mo2, O–Si1, O–Si2) are selected for research. It is found that Mo–Va2 vacancy has the stronger structural stability in the ground state in comparison with other vacancies. Besides, the deformation resistance and hardness of the parent Mo5Si3 are weakened due to the introduction of different vacancy defects and oxygen occupation. The ratio of B/G indicates that oxygen atoms occupation and vacancy defects result in brittle-to-ductile transition for Mo5Si3. These vacancies and the oxygen atoms occupation change the localized hybridization between Mo–Si and Mo–Mo atoms. The weaker O–Mo bond is a contributing factor for the excellent ductile behavior in the O-Si2 model for Mo5Si3.

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Section: Introductionmentioning

confidence: 99%

The vacancy defects and oxygen atoms occupation effects on mechanical and electronic properties of Mo₅Si₃ silicides

Chen

Zhang

Yang

et al. 2021

Commun. Theor. Phys.

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“…Oxides of zirconium, titanium, and silicon are commonly present in the starting powders . These oxides from the precursor powders can be the cause for the formation of other oxide phases during the sintering process. , At a temperature above 1400 °C, the B 2 O 3 formed is expected to vaporize . The less thermodynamically stable Zr 2 Si phase is formed through the formation of the disilicide phase, which occurs due to the weakening of Zr–Si bonds .…”

Section: Results and Discussionmentioning

confidence: 99%

Development of ZrB₂-Based Single Layer Absorber Coating and Molten Salt Corrosion of Bulk ZrB₂–SiC Ceramic for Concentrated Solar Power Application

Hasan

Dey

et al. 2021

J. Phys. Chem. C

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This study has dual objectives, one to develop single layer ZrB2–SiC-based ceramic absorber coating on stainless substrate, and another aim is to explore the degradation of ZrB2–SiC bulk ceramic in molten solar salt. In particular, we report the molten salt corrosion behavior of earlier developed ZrB2–SiC ceramic composite at 400 °C for 100 h. The corrosion rate in solar salt was determined to be 0.73 ± 0.09 mg h–1/cm2 by gravimetric analysis. Binary and ternary oxide phases were formed due to electrochemical corrosion. The hot-pressed bulk ZrB2–SiC ceramic exhibits a high solar absorptance of 0.848 and also a high thermal emissivity of 0.66. A one-layer solar selective absorber coating without antireflection layer was developed using the ceramic disk as a sputtering target. When deposited using radio frequency (RF) magnetron sputtering technique on stainless steel substrate, a solar absorptance of 0.769 and thermal emissivity of 0.15 was obtained for an amorphous coating of thickness ∼90 nm, without antireflection coating. The composition, determined by electron probe microanalyzer and X-ray photoelectron spectroscopy techniques, revealed nonstoichiometric phases in the layer with a relatively higher concentration of the lighter elements. The implication of the present work for concentrated solar power application is discussed.

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“…Kinetics and the mechanism of combustion, as well as the phase and structure formation mechanisms of SHS in Zr–Si–B and Zr–Si–Al–B system, were investigated in . The following composites were produced by SHS: ZrB 2 –ZrSi, ZrB 2 –ZrSi 2 , ZrB 2 –ZrSiAl 2 .…”

Section: Shs In Zr–si–b Systemmentioning

confidence: 99%

“…Figure provides the structure of dense ceramic composites in Zr–Si–B system, produced by forced SHS‐pressing technology …”

Section: Shs In Zr–si–b Systemmentioning

confidence: 99%

SHS of Silicon‐Based Ceramics for the High‐Temperature Applications

et al. 2018

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High-temperature materials attract a growing interest from both the scientists and engineers, since the increase of the operating temperatures is crucial for the enhancement of many energy conversion processes. Another area of application of high-temperature materials is high-velocity air flight, where the ultra-high temperature ceramics (UHTCs) are pivotal for the creation of robust nose tips and leading edges of the skins of high-velocity jets. Compounds of refractory metals with silicon, such as TaSi 2 , MoSi 2 , ZrSi 2 , are characterized by unrivaled resistance in aggressive environments. However, most of them are not suitable for application as high-temperature structural materials due to the low mechanical properties. Therefore, they are frequently used as a constituent for the high-temperature composite materials such as TaSi 2 -SiC, ZrC-MoSi 2 , ZrB 2 -MoSi 2 , ZrB 2 -ZrSi 2 . One of the most convenient ways of producing these composite materials is self-propagating hightemperature synthesis (SHS), known for its high productivity, energyefficiency, and ecological safety. This review summarizes the latest developments of the SHS of the silicon-based high-temperature ceramics.

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The kinetics and mechanism of combusted Zr–B–Si mixtures and the structural features of ceramics based on zirconium boride and silicide

Cited by 18 publications

References 29 publications

The vacancy defects and oxygen atoms occupation effects on mechanical and electronic properties of Mo₅Si₃ silicides

The vacancy defects and oxygen atoms occupation effects on mechanical and electronic properties of Mo₅Si₃ silicides

Development of ZrB₂-Based Single Layer Absorber Coating and Molten Salt Corrosion of Bulk ZrB₂–SiC Ceramic for Concentrated Solar Power Application

SHS of Silicon‐Based Ceramics for the High‐Temperature Applications

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The kinetics and mechanism of combusted Zr–B–Si mixtures and the structural features of ceramics based on zirconium boride and silicide

Cited by 18 publications

References 29 publications

The vacancy defects and oxygen atoms occupation effects on mechanical and electronic properties of Mo5Si3 silicides

The vacancy defects and oxygen atoms occupation effects on mechanical and electronic properties of Mo5Si3 silicides

Development of ZrB2-Based Single Layer Absorber Coating and Molten Salt Corrosion of Bulk ZrB2–SiC Ceramic for Concentrated Solar Power Application

SHS of Silicon‐Based Ceramics for the High‐Temperature Applications

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Product

Resources

About

The vacancy defects and oxygen atoms occupation effects on mechanical and electronic properties of Mo₅Si₃ silicides

The vacancy defects and oxygen atoms occupation effects on mechanical and electronic properties of Mo₅Si₃ silicides

Development of ZrB₂-Based Single Layer Absorber Coating and Molten Salt Corrosion of Bulk ZrB₂–SiC Ceramic for Concentrated Solar Power Application