Accession Number:

ADA237753

Title:

Organometallic Precursor Routes to Si-C-Al-O-N Ceramics

Descriptive Note:

Final rept. 1 Jul 89-31 Mar 91,

Corporate Author:

RENSSELAER POLYTECHNIC INST TROY NY DEPT OF CHEMISTRY

Personal Author(s):

Report Date:

1991-05-15

Pagination or Media Count:

77.0

Abstract:

This report describes the results of a research program directed at the development of improved methods for the preparation of Si-C-Al-O-N ceramics using organometallic precursors. Two main approaches were employed in these studies, 1 co-pyrolysis of homogeneous mixtures of organosilicon and organoaluminum precursors and 2 pyrolysis of specially designed, single- component precursors containing both Si and Al. Depending on the choice of precursors and the pyrolysis atmosphere employed, nanocrystalline Beta-SiC2H- AlN and Si3N4AlN composites, 2H-SiCAlN solid solutions, and various crystalline SiAlON phases were obtained as final ceramic products after annealing at 1400-1800 C the initially amorphous pre-ceramic phases obtained on pyrolysis to 1000 C.

Subject Categories:

  • Physical Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE