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Title: A preceramic polymer route to molded SiC ceramic parts

Abstract

A polysilazane preceramic polymer, which yields amorphous Si-N-C ceramic material when pyrolyzed, was investigated as a binder for SiC powder in dry pressing formulations. For formulations containing 15-30 wt pct polysilazane binder, the nonoxidative thermal crosslinking/pyrolysis of the molded parts at up to 1300 C produced an SiC-particulate composite material in which the dominant microstructural feature was a high level of nanoporosity in the Si-N-C matrix phase. Ongoing efforts to characterize the mechanical, physical, and microstructural properties of these ceramic materials are discussed. Preliminary work on the fabrication of several structural ceramic parts is also presented to illustrate the unique processing characteristics of these materials. 5 refs.

Authors:
;
Publication Date:
OSTI Identifier:
5949919
Report Number(s):
CONF-910162-
Journal ID: ISSN 0196-6219; CODEN: CESPD
Resource Type:
Conference
Journal Name:
Ceramic Engineering and Science Proceedings; (United States)
Additional Journal Information:
Journal Volume: 12; Conference: 15. annual conference on composites and advanced ceramics, Cocoa Beach, FL (United States), 13-16 Jan 1991; Journal ID: ISSN 0196-6219
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CERAMICS; FABRICATION; SILICON CARBIDES; BINDERS; COMPOSITE MATERIALS; MECHANICAL PROPERTIES; MICROSTRUCTURE; MOLDING; ORGANOMETALLIC COMPOUNDS; PHYSICAL PROPERTIES; POLYMERS; POWDERS; PYROLYSIS; CARBIDES; CARBON COMPOUNDS; CHEMICAL REACTIONS; CRYSTAL STRUCTURE; DECOMPOSITION; MATERIALS; ORGANIC COMPOUNDS; SILICON COMPOUNDS; THERMOCHEMICAL PROCESSES; 360201* - Ceramics, Cermets, & Refractories- Preparation & Fabrication

Citation Formats

Semen, J, and Loop, J G. A preceramic polymer route to molded SiC ceramic parts. United States: N. p., 1991. Web.
Semen, J, & Loop, J G. A preceramic polymer route to molded SiC ceramic parts. United States.
Semen, J, and Loop, J G. 1991. "A preceramic polymer route to molded SiC ceramic parts". United States.
@article{osti_5949919,
title = {A preceramic polymer route to molded SiC ceramic parts},
author = {Semen, J and Loop, J G},
abstractNote = {A polysilazane preceramic polymer, which yields amorphous Si-N-C ceramic material when pyrolyzed, was investigated as a binder for SiC powder in dry pressing formulations. For formulations containing 15-30 wt pct polysilazane binder, the nonoxidative thermal crosslinking/pyrolysis of the molded parts at up to 1300 C produced an SiC-particulate composite material in which the dominant microstructural feature was a high level of nanoporosity in the Si-N-C matrix phase. Ongoing efforts to characterize the mechanical, physical, and microstructural properties of these ceramic materials are discussed. Preliminary work on the fabrication of several structural ceramic parts is also presented to illustrate the unique processing characteristics of these materials. 5 refs.},
doi = {},
url = {https://www.osti.gov/biblio/5949919}, journal = {Ceramic Engineering and Science Proceedings; (United States)},
issn = {0196-6219},
number = ,
volume = 12,
place = {United States},
year = {Tue Oct 01 00:00:00 EDT 1991},
month = {Tue Oct 01 00:00:00 EDT 1991}
}

Conference:
Other availability
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