Boron-containing polysilylcarbodi-imides: A new class of molecular precursors for Si-B-C-N ceramics

Weinmann, Markus; Haug, Rainer; Bill, Joachim; Aldinger, Fritz; Schuhmacher, Jörg; Müller, Klaus

doi:10.1016/s0022-328x(97)00085-5

Cited by 72 publications

(49 citation statements)

References 34 publications

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“…In other words, the structure and the property of the polymer-derived Si-B-C-N ceramic can be tailored by controlling the raw materials or various operation parameters [5]. By this method, various atoms or tetrahedrons are uniformly distributed in the ceramic; the ceramic composition can be adjusted conveniently; the product contains no impurity phase at the grain boundary; and the pyrolyzing process is carried out at relatively low temperatures.…”

Section: Organic Polymer Pyrolyzing Routementioning

confidence: 99%

“…Generally, a kind of special organic polymer precursor, such as solid poly (boro)silazanes or polysilylcarbodiimides, is pyrolyzed at 1000 ℃-1400 ℃ in an inert atmosphere for several hours [3][4][5]. During the pyrolyzing process, side-chain groups break; organic molecules with low molecular weight volatilize; crosslinking and curing take place in the polymer precursor.…”

Section: Introduction To Si-b-c-n Ceramicmentioning

confidence: 99%

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Progress of a novel non-oxide Si-B-C-N ceramic and its matrix composites

et al. 2012

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Abstract:In the past twenty years, Si-B-C-N ceramic has attracted wide attention due to its special structure and outstanding properties. The ceramic generally has an amorphous or a nano-crystalline structure, and has excellent structural stability, oxidation resistance, creep resistance and high-temperature mechanical properties, etc. Thus, Si-B-C-N ceramic attracts many researchers and finds potential applications in transportation, aerocraft, energy, information, microelectronics and environment, etc. Much work has been carried out on its raw materials, preparation processes, structural evolution, phase equilibrium and high-temperature properties. In recent years, many researchers focus on its new preparation methods, the preparation of dense ceramic sample with large dimensions, ceramic matrix composites reinforced by carbon fiber or SiC whisker, or components with various applications. Research on Si-B-C-N ceramic will develop our insight into the relationship between structures and properties of ceramics, and will be helpful to the development of novel high-performance ceramics. This paper reviews the preparation processes, general microstructures, mechanical, chemical, electrical and optical properties, and potential applications of Si-B-C-N ceramic, as well as its matrix composites.

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Section: Organic Polymer Pyrolyzing Routementioning

confidence: 99%

Section: Introduction To Si-b-c-n Ceramicmentioning

confidence: 99%

Progress of a novel non-oxide Si-B-C-N ceramic and its matrix composites

et al. 2012

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“…3). On the one hand, polysilylcarbodiimides that contain vinyl groups can be reacted with dimethylsulfide borane via the polymer route [55][56][57][58] ( Fig. 3).…”

Section: Polymer Systemsmentioning

confidence: 99%

“…3). [56][57][58] Besides hydroboration reactions, hydrosilylation involving liquid mixtures of vinylsilazanes 50 and tris(hydridosilylethyl)boranes 59 can also be used in the formation of preceramic networks for the preparation of quaternary Si-B-C-N ceramics (Eqn [2]). …”

Section: Polymer Systemsmentioning

confidence: 99%

Precursor‐derived Si–(B–)C–N ceramics: thermolysis, amorphous state and crystallization

Bill

Kamphowe

Müller

et al. 2001

Applied Organom Chemis

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The preparation of silicon nitride-and carbidebased ceramics by solid-state thermolysis of polysilazanes and polysilylcarbodiimides is described. Results on the ceramization of the preceramic compounds and the architecture of the corresponding amorphous states obtained by spectroscopic means and by X-ray and neutron scattering are reviewed. Fundamental correlations between the composition and structure of the preceramic compounds and the architecture of the amorphous state are revealed. Furthermore, the crystallization behavior of the amorphous precursor-derived Si-C-N ceramics is treated. Moreover, the influence of boron on the thermal stability of the amorphous state is described. The high-temperature behavior of these Si-B-C-N solids can be correlated with their phase composition. Ceramic materials with compositions located close to the three-phase equilibrium SiC BN C exhibit a high temperature stability up to 2000°C. This effect is accompanied by the formation of a metastable solid consisting of Si 3 N 4 and SiC nanocrystals that are embedded in a turbostratic B-C-N matrix phase. Based on thermodynamic considerations, a model for the high-temperature stability effect is proposed.

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“…Based on the results of Riccitiello et al [32], who reported on the synthesis of polyborosilanes through hydroboration of methylvinylsilanes by borane adducts or diborane, Aldinger et al [33], as well as Riedel et al [34], applied the hydroboration reaction of different borane adducts with various vinylsilanes obtaining single source precursors with a carbon bridge between silicon and boron (Eq. 7):…”

Section: Synthesismentioning

confidence: 99%

Amorphous Multinary Ceramics in the Si-B-N-C System

Jansen

Jäschke

Structure and Bonding

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Boron-containing polysilylcarbodi-imides: A new class of molecular precursors for Si-B-C-N ceramics

Cited by 72 publications

References 34 publications

Progress of a novel non-oxide Si-B-C-N ceramic and its matrix composites

Progress of a novel non-oxide Si-B-C-N ceramic and its matrix composites

Precursor‐derived Si–(B–)C–N ceramics: thermolysis, amorphous state and crystallization

Amorphous Multinary Ceramics in the Si-B-N-C System

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