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Structural investigation of Si-Al-C-O precursors and their pyrolysis products in nitrogen

Li, XD; Edirisinghe, MJ; (2003) Structural investigation of Si-Al-C-O precursors and their pyrolysis products in nitrogen. P ROY SOC LOND A MAT , 459 (2039) 2731 - 2747. 10.1098/rspa.2003.1140.

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Abstract

A polysilane (PS) has been modified chemically with aluminium acetylacetonate (AlAce) to prepare new Si-Al-C-O precursors. Chemical reactions occur between PS and AlAce and this gives rise to higher pyrolysis yields from the precursors at 900 degreesC in nitrogen, compared with that of PS, due to network formation by cross-linking. Further pyrolysis of the precursors to 1700 degreesC in nitrogen produces ceramics of the SiC-AlN system with composition dependent on the AlAce/PS ratio. The structures of the precursors and their pyrolysis products have been characterized and the influence of the AlAce/PS ratio has been elucidated.

Type: Article
Title: Structural investigation of Si-Al-C-O precursors and their pyrolysis products in nitrogen
DOI: 10.1098/rspa.2003.1140
Keywords: preceramic polymers, precursors, silicon carbide, aluminium nitride, synthesis, structural characteristics, SILICON-CARBIDE, ALUMINUM NITRIDE, SOLID-SOLUTIONS, PRODUCTION MECHANISM, INORGANIC MATERIALS, PHASE-STABILITY, POLYMER ROUTE, CERAMICS, SYSTEM, AIN
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
URI: http://discovery.ucl.ac.uk/id/eprint/11646
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