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Particulate‐Reinforced Precursor‐Derived Si–C–N Ceramics: Optimization of Pyrolysis Atmosphere and Schedules
Author(s) -
Lee SeaHoon,
Weinmann Markus,
Aldinger Fritz
Publication year - 2005
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.1551-2916.2005.00587.x
Subject(s) - pyrolysis , microstructure , ceramic , particulates , materials science , decomposition , chemical engineering , thermal stability , thermal decomposition , composite material , chemistry , organic chemistry , engineering
Surface oxidation occurred during pyrolysis of SiC particulate‐reinforced composites (PRCs) with a precursor‐derived Si–C–N matrix. In contrast, such an oxidation was not observed in pure Si–C–N ceramics. The present investigation discusses the possible reasons for this, and reports on the influence of such an oxidation on the microstructure and the mechanical and thermal properties of PRCs by the precursor‐impregnation and pyrolysis method. The high‐temperature mass stability of the PRCs in Ar deteriorated owing to the decomposition of SiO 2 formed by oxidation. The effects of the pyrolysis schedule on the processing and mechanical properties of PRCs are also investigated.