High temperature deformation behaviour of crystallized Si–B–C–N ceramics obtained from a boron modified poly(vinyl)silazane polymeric precursor

Kumar, Ravi; Mager, R.; Cai, Yuanqiang; Zimmermann, André; Aldinger, Fritz

doi:10.1016/j.scriptamat.2004.03.012

Cited by 35 publications

(7 citation statements)

References 4 publications

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“…When the amorphous ceramic is annealed at 1800-2000 o C, it crystallizes and changes into a nano composite ceramic [3]. Si-B-C-N ceramic normally has high thermal stability, nice oxidation resistance, perfect creep resistance, high hardness, small thermal expansion coefficient and high electrical resistance [4][5][6][7]. Currently, the methods used to prepare Si-B-C-N ceramic mainly include the organic-polymer-pyrolyzing route and the physical vapour deposition (PVD) method [1,2,8,9].…”

Section: Introductionmentioning

confidence: 99%

A Mechanically-Alloyed Amorphous 2Si-B-3C-N Ceramic with a Crystallization Temperature up to 1800°C

Zhang

Jia

Yang

et al. 2018

SSP

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A mixture of cubic silicon powder, hexagonal boron nitride powder and graphite powder was mechanically alloyed for 30 hrs in argon. The as-milled 2Si-B-3C-N composite powder was heated up to 1900 °C in nitrogen, with a heating rate of 25 °C/min and under a pressure of 80 MPa. XRD and HRTEM results show that the as-milled 2Si-B-3C-N composite powder has a well amorphous structure. Under the current hot-pressing circumstances, the amorphous ceramic starts to crystallize at a temperature between 1800 °C and 1900 °C. Once the temperature is higher than crystallization temperature, crystallites appear in the amorphous matrix with a great nucleation rate, but a small growth rate. Hot pressed at 1900 °C for 0 mins or 10 mins, the prepared 2Si-B-3C-N bulk ceramic has an average grain size of 8.7 nanometers and 22.3 nanometers, respectively. After an intensive literature search, we believe the present work is the first one to make clear that it is possible to use the mechanical alloying route to prepare amorphous Si-B-C-N ceramic with such a high crystallization temperature.

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Section: Introductionmentioning

confidence: 99%

A Mechanically-Alloyed Amorphous 2Si-B-3C-N Ceramic with a Crystallization Temperature up to 1800°C

Zhang

Jia

Yang

et al. 2018

SSP

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“…Si-B-C-N ceramics can stable to 2000 ºC even in nitrogen-free atmosphere [10]. Investigations on high temperature deformation behavior of crystallized Si-B-C-N at 1500 ºC indicated strong creep resistance [11]. A complex layer was formed during oxidation, which was beneficial to the high oxidation resistance [12,13].…”

Section: Introductionmentioning

confidence: 99%

“…The initial structure of Si-B-C-N synthesized by polymer-thermolysis is amorphous and can be transformed into thermodynamically stable crystalline phase after annealing at high temperature. Nanocrystallite consisting of stable phase of SiC and Si 3 N 4 dispersed in an amorphous matrix was found after the annealing [11,14]. Mechanical properties can be intensified by the dispersion of nanocrystallite, especially the creep resistance at high temperature [15].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Properties of SiC Nanocrystallite Reinforced Amorphous Si–B–C–N Ceramics

Huang

et al. 2012

KEM

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Amorphous Si–B–C–N ceramics synthesized by polymer thermolysis possess excellent chemical, thermal and mechanical stability at high temperature. Many attentions have been devoted to study the crystallization and stability of Si–B–C–N ceramics. The SiC nanocrystallite reinforced amorphous Si–B–C–N ceramics have been fabricated by pyrolysis of single-source precursors at high temperature. The heat-treatment at high temperature commonly impaired the thermal stability of the composites. Crack and pore limit the development of the composites. New processing routes that overcome those problems are desirable. Here we reported the thermolysis of binary-source precursors mixed by polycarbosilane and boron-modified polyvinylsilazanen to fabricate Si–B–C–N composites with relative densities up to 96%. Green bodies were obtained by compaction of precursors using warm pressing at different temperature. The obtained composites were characterized by Scanning Electron Microscope and X-ray Diffraction.

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“…Non-oxide silicon boron carbonitride (Si-B-C-N) ceramics can be a potential candidate material for aerospace applications due to its low density of 2.5 g/cm 3 [2]. It has high thermal stability of 2200 1C in inert atmosphere [2] and 1800 1C in air [3], and provides excellent thermomechanical properties [4][5][6][7]. It also possesses high phase stability as it remains amorphous and resists crystallization up to as high as 1800 1C [8,9].…”

Section: Introductionmentioning

confidence: 99%

Thermal conductivity of precursor derived Si–B–C–N ceramic foams using Metroxylon sagu as sacrificial template

Kousaalya

Kumar

Sridhar

2015

Ceramics International

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High temperature deformation behaviour of crystallized Si–B–C–N ceramics obtained from a boron modified poly(vinyl)silazane polymeric precursor

Cited by 35 publications

References 4 publications

A Mechanically-Alloyed Amorphous 2Si-B-3C-N Ceramic with a Crystallization Temperature up to 1800°C

A Mechanically-Alloyed Amorphous 2Si-B-3C-N Ceramic with a Crystallization Temperature up to 1800°C

Preparation and Properties of SiC Nanocrystallite Reinforced Amorphous Si–B–C–N Ceramics

Thermal conductivity of precursor derived Si–B–C–N ceramic foams using Metroxylon sagu as sacrificial template

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