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Synthesis of Silicon Carbide Ceramics Using Chemically Modified Polycarbosilanes as a Compaction Binder
Author(s) -
Sawai Yuichi,
Iwamoto Yuji,
Okuzaki Sachiko,
Yasutomi Yoshiyuki,
Kikuta Koichi,
Hirano Shinichi
Publication year - 1999
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1999.tb02051.x
Subject(s) - materials science , ceramic , compaction , silicon carbide , composite material , coating , flexural strength , yield (engineering)
A chemically modified polycarbosilane (PC) containing organofluoric groups (PCOCF) has been synthesized from PC and fluoroalkylmethyldimethoxysilane. PCOCF acts as an efficient compaction binder for SiC powders and as a coating material with excellent oxidation resistance in wet air. PCOCF‐coated SiC powders also show excellent packing properties because of the organofluoric side chains, which give highly dense green compacts. PCOCF provides a high ceramic yield of 75% and highly dense SiC ceramics. Four‐point bending strength increases and the scatter in strength values decreases significantly by PCOCF coating.