Combustion synthesis of high-temperature ZrB2-SiC ceramics

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

doi:10.1016/j.jeurceramsoc.2018.02.016

Cited by 27 publications

(5 citation statements)

References 32 publications

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“…The optimal composition was found to be 70%ZrB 2 –22%SiC–8%ZrSi 2 and was characterized by Vickers hardness HV10 of 18 GPa, flexural strength 471 ± 15 MPa, and fracture toughness 7.33 ± 0.24 MPa × m 1/2 . The properties of ZrB 2 –ZrSi 2 –SiC composites were close to the mechanical properties of ZrB 2 –SiC ceramics with a silicon carbide content of 25–75%, produced by SHS …”

Section: Shs In Zr–si–b Systemsupporting

confidence: 54%

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 Zr–si–b Systemsupporting

confidence: 54%

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

et al. 2018

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“…Кроме того, учитывая масштаб гетерогенности 4-компонентной порошковой системы, кристаллизация зерен HfB 2 возможна из пересыщенного бором расплава бинарной эвтектики Hf-Si (t пл = 1330 °С). Карбид кремния SiC образуется по механизму реакционной диффузии из пересыщенного углеродом кремниевого расплава [25,38].…”

Section: результаты и их обсуждениеunclassified

Structure, Properties, and Oxidation Resistance of Prospective HfB2–SiC Based Ceramics

Pogozhev

Potanin

Рупасов

et al. 2020

Russ. J. Non-ferrous Metals

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Аннотация: Работа посвящена получению гетерофазной порошковой и консолидированной керамики на основе диборида гафния и карбида кремния путем комбинирования методов самораспространяющегося высокотемпературного синтеза (СВС) и горячего прессования (ГП). Структура синтезированного СВС-порошка состоит из зерен диборида гафния и агломерированных зерен карбида кремния полиэдрической формы размером 2-6 мкм. Полученные порошки характеризуются средним размером частиц ~10 мкм при максимальном его значении порядка 30 мкм. Фазовые составы консолидированной методом ГП керамики и синтезированного порошка идентичны. Полученный компактный образец обладает высокой структурной и химической однородностью, пористостью 3,8 %, твердостью 19,8±0,4 ГПа, прочностью 597±59 МПа и трещиностойкостью 8,8±0,4 МПа•м 1/2 . Проведены газодинамические испытания (ГДИ) по определению окислительной стойкости при воздействии высокоэнтальпийного газового потока. Исследованы фазовый состав и микроструктура поверхности образца после испытания. ГП-образец продемонстрировал отличную стойкость к воздействию высокотемпературного газового потока при температуре 2150 °С и плотности теплового потока 5,6 МВт/м 2 в течение 300 с. В процессе газодинамических испытаний на поверхности керамики HfB 2 -SiC образуется плотный защитный слой толщиной 30-40 мкм, состоящий из каркаса оксидных зерен HfO 2 , пространство между которыми заполнено аморфным боросиликатом SiO 2 -B 2 O 3 . Из композиционного СВС-порошка HfB 2 -SiC методом горячего прессования изготовлены экспериментальные образцы модельных втулок камеры сгорания жидкостного ракетного двигателя малой тяги, предназначенные для проведения ГДИ в приближенных к реальным условиях эксплуатации.Ключевые слова: СВС, горячее прессование, керамика, HfB 2 , SiC, газодинамические испытания, плотность теплового потока, аморфный слой SiO 2 -B 2 O 3 .Погожев Ю.С. -канд. техн. наук, доцент кафедры порошковой металлургии и функциональных покрытий (ПМиФП) НИТУ «МИСиС», ст. науч. сотрудник Научно-учебного центра (НУЦ) СВС МИСиС-ИСМАН (119049, г. Москва, Ленинский пр-т, 4).

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“…Utilizing high activity powders to improve the sintering performance is another way to enhance the structural oxygen blocking ability of the coatings. Recently, self-propagating high-temperature synthesis (SHS) method has been widely exploited in the preparation of composites [26][27][28][29][30], which has superior heating and cooling rates, being conducive to generate high activity due to the concentration of defects and non-equilibrium phases in the products. Iatsyuk et al [28] used SHS method to prepare ZrB 2 -SiC ceramics with fine grains and high density.…”

Section: Introduction mentioning

confidence: 99%

“…Recently, self-propagating high-temperature synthesis (SHS) method has been widely exploited in the preparation of composites [26][27][28][29][30], which has superior heating and cooling rates, being conducive to generate high activity due to the concentration of defects and non-equilibrium phases in the products. Iatsyuk et al [28] used SHS method to prepare ZrB 2 -SiC ceramics with fine grains and high density. The porosity was only 1.5%, and the Vickers hardness was 24.3-25.0 GPa.…”

Section: Introduction mentioning

confidence: 99%

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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Combustion synthesis of high-temperature ZrB2-SiC ceramics

Cited by 27 publications

References 32 publications

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

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

Structure, Properties, and Oxidation Resistance of Prospective HfB2–SiC Based Ceramics

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

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