1995
DOI: 10.1002/adma.19950070903
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Precursor‐derived Covalent Ceramics*

Abstract: The preparation of ceramic materials from preceramic compounds provides a means for the synthesis of new materials which cannot be obtained by conventional methods. An example is shown in the figure, which shows carbon‐fiber‐reinforced silicon carbide coated with silicon carbonitride prepared by dip‐coating the substrate with a slurry made of polyhydridomethylsilazane and silicon powder. Progress and applicational examples are reviewed magnified image.

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Cited by 354 publications
(232 citation statements)
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“…Such a local compositional mixture of atoms is expected to be disadvantageous to transformation of the amorphous state into thermodynamically stable crystalline phases such as Si 3 N 4 , SiC and BN. 17) Phase separation of the amorphous state, which would take place before crystallization, requires rearrangement of the amorphous network and atomic diffusion. In this section, we examine selfdiffusion behavior in amorphous Si-B-C-N.…”
Section: Diffusion Behaviormentioning
confidence: 99%
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“…Such a local compositional mixture of atoms is expected to be disadvantageous to transformation of the amorphous state into thermodynamically stable crystalline phases such as Si 3 N 4 , SiC and BN. 17) Phase separation of the amorphous state, which would take place before crystallization, requires rearrangement of the amorphous network and atomic diffusion. In this section, we examine selfdiffusion behavior in amorphous Si-B-C-N.…”
Section: Diffusion Behaviormentioning
confidence: 99%
“…17) At high temperatures before crystallization, the amorphous network will undergo rearrangement so as to bring about phase separation into Si 3 N 4 -rich, BN-rich and SiCrich regions. Since constituent atoms are homogeneously distributed in the amorphous state, diffusion processes are necessary for the crystallization behavior.…”
Section: Introductionmentioning
confidence: 99%
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“…3,4 Many kinds of ceramic fibers have been developed using polymer precursor method, since continuous SiC fibers were obtained by this method in the 1970s. [5][6][7] Bulk amorphous ceramics such as Si-C-N and Si-B-C-N have been fabricated by pyrolyzing the isostatically pressed and warm pressed preceramic powders.…”
Section: Introductionmentioning
confidence: 99%
“…[4][5][6] Bulk amorphous ceramics such as Si-C-N and Si-B-C-N have been developed by pyrolyzing the isostatically pressed and warm pressed preceramic powders. [7][8][9][10][11] However, it is difficult to fabricate no porosity ceramic monoliths by these processes since porosity is necessary to remove the gas species during pyrolysis.…”
Section: Introductionmentioning
confidence: 99%