The Preceramic Polymer Route to Silicon-Containing Ceramics.
Abstract
Silicon-containing ceramics include the oxide materials, silica and the silicates; the binary compounds of silicon with non-metals, principally silicon carbide and silicon nitride, silicon oxynitride and the sialons; main group and transition metal silicides, and, finally, elemental silicon itself. While there is vigorous research activity throughout the world on the preparation of all of these classes of solid silicon compounds by the newer preparative techniques, in this report we will focus our attention on silicon carbide and silicon nitride. Silicon carbide, SiC (1) and silicon nitride, Si3N4 (2), have been known for some time. Their properties (Tables 1 and 2), especially their high thermal and chemical stability, their hardness, their strength, as well as other properties have led to useful applications for both of these materials. Silicon carbide has been an article of commerce since the development of the Acheson process for its manufacture just before the turn of the century, but silicon nitride is a relative newcomer as far as commercial utilization goes (3). Its modern applications include: gas turbine parts, rocket housings, electric insulators, thermocouple tubes, high temperature bearings, laser nozzles, and thin film in microelectronics.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 23, 1987
- Accession Number
- ADA177371
Entities
People
- Dietmar Seyferth
- Yuan-fu Yu
Organizations
- Massachusetts Institute of Technology