Preparation of Sic/AIN Solid Solutions Using Organometallic Precursors
Abstract
The co-pyrolysis of organoaluminum and organosilicon compounds was investigated as a potential source of SiC/ALN solid solutions. Using two different co-pyrolysis methods, homogeneous mixture of organoaluminum amides and both a vinylic polysilane and a polycarbosilane were converted to a pre-ceramic solid that transformed to crystalline Sic/ALN solid solutions at < 1600 C. Moreover, the liquid, polymeric, form of these precursor mixtures provides a potential processing advantage that may be useful for ceramic matrix preparation and other applications. In the course of this work new precursors to both ALN and SiC were identified and their structures and pyrolysis reactions were investigated, providing useful information regarding structure/pyrolysis chemistry relationships for such precursor systems. In addition, modifications of this co-pyrolysis approach to SiC/ALN solid solutions were employed to obtain mixed-phase SiC/ALN solid solutions were employed to obtain mixed-phase SiC/ALN, silicon nitride, silicon nitride/ALN and Beta-SiALON ceramics. The composition, phase distribution, and microstructure of these ceramics were examined by elemental analysis, x-ray powder diffraction, SEM/TEM, and other methods. Keywords: Aluminum nitrides; Organometallic compound.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 15, 1989
- Accession Number
- ADA206998
Entities
People
- L. V. Interrante
Organizations
- Rensselaer Polytechnic Institute