Self-propagating high-temperature synthesis of nanocomposite ceramics TaSi2-SiC with hierarchical structure and superior properties

Vorotilo, S.; Левашов, Е. А.; Курбаткина, В. В.; Kovalev, D. Yu.; Кочетов, Н. А.

doi:10.1016/j.jeurceramsoc.2017.08.015

Cited by 40 publications

(15 citation statements)

References 37 publications

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“…As Table demonstrates, hierarchically organized TaSi 2 –SiC composite, produced by MA‐SHS in, had a higher set of mechanical properties as compared to other TaSi 2 ‐based composites. This increase of mechanical properties is caused by the high grain size gradient, which is characteristic for the hierarchically organized nanostructures …”

Section: Shs In Ta–si–c Systemmentioning

confidence: 93%

“…Also, mechanical properties of TaSi 2 –TaC bulk composites, produced by reaction‐assisted hot pressing, were reported in . For the Ta–Si–C system, the kinetic parameters of SHS, including the combustion temperature and velocity as well as phase and structure formation mechanisms, were recently investigated …”

Section: Shs In Ta–si–c Systemmentioning

confidence: 99%

“…Therefore, Ta–Si–C mixtures prepared in a ball mill could not be ignited, necessitating the use of mechanical activation. The optimal MA regime was found to be as following: centrifugal acceleration 250 m s −2 , balls to mixture ratio 20:1, activation duration 20 min (Aktivator‐2S mill) . The peculiarity of the combustion in Ta–Si–C system lied in the fact that at the combustion temperature, the most stable Ta‐based phase was TaC; however, at the temperatures below 1685 K, TaC reacted with Si and formed the final phase composition: TaSi 2 + SiC.…”

Section: Shs In Ta–si–c Systemmentioning

confidence: 99%

“…Dependences of T c a) and U c b) on T 0 for the mixtures with the following compositions: TaSi 2 , TaSi 2 –30%SiC, TaSi 2 –50%SiC, TaSi 2 –70%SiC . Please change the subparts of figure to lowercase to ensure consistency.…”

Section: Shs In Ta–si–c Systemmentioning

confidence: 99%

“…Hierarchically − organized materials are an emerging field, which attracts a wide interest in the field of materials science. It was already demonstrated that such materials possess outstanding mechanical properties due to the high grains size gradients . However, materials with hierarchical structures are hard to produce by traditional powder metallurgy.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Shs In Ta–si–c Systemmentioning

confidence: 93%

Section: Shs In Ta–si–c Systemmentioning

confidence: 99%

Section: Shs In Ta–si–c Systemmentioning

confidence: 99%

Section: Shs In Ta–si–c Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2018

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Ablation behavior and mechanism of TaSi2-modified carbon fabric-reinforced phenolic composite

Zhu

Liu

et al. 2020

J Mater Sci

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Preparation of ZrB2-MoSi2 high oxygen resistant coating using nonequilibrium state powders by self-propagating high-temperature synthesis

et al. 2021

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To achieve high oxygen blocking structure of the ZrB2-MoSi2 coating applied on carbon structural material, ZrB2-MoSi2 coating was prepared by spark plasma sintering (SPS) method utilizing ZrB2-MoSi2 composite powders synthesized by self-propagating high-temperature synthesis (SHS) technique as raw materials. The oxygen blocking mechanism of the ZrB2-MoSi2 coatings at 1973 K was investigated. Compared with commercial powders, the coatings prepared by SHS powders exhibited superior density and inferior oxidation activity, which significantly heightened the structural oxygen blocking ability of the coatings in the active oxidation stage, thus characterizing higher oxidation protection efficiency. The rise of MoSi2 content facilitated the dispersion of transition metal oxide nanocrystals (5–20 nm) in the SiO2 glass layer and conduced to the increasing viscosity, thus strengthening the inerting impact of the compound glass layer in the inert oxidation stage. Nevertheless, the ZrB2-40 vol%MoSi2 coating sample prepared by SHS powders presented the lowest oxygen permeability of 0.3% and carbon loss rate of 0.29×10−6 g·cm−2·s−1. Owing to the gradient oxygen partial pressure inside the coatings, the Si-depleted layer was developed under the compound glass layer, which brought about acute oxygen erosion.

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Self-propagating high-temperature synthesis of nanocomposite ceramics TaSi2-SiC with hierarchical structure and superior properties

Cited by 40 publications

References 37 publications

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

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

Ablation behavior and mechanism of TaSi2-modified carbon fabric-reinforced phenolic composite

Preparation of ZrB2-MoSi2 high oxygen resistant coating using nonequilibrium state powders by self-propagating high-temperature synthesis

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