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Proceedings Paper

Application of hot-pressed silicon carbide to large high-precision optical structures
Author(s): C. James Shih; Andris Ezis
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Paper Abstract

A new grade of silicon carbide has been developed with properties that make it very attractive for a variety of applications in precision optical structures. Its microstructural homogeneity makes it capable of accepting an optical finish with subnanometer surface roughness. Its strength and fracture toughness, on a bulk scale, exceed all previous silicon carbide materials. This hot-pressed silicon carbide can be produced in single blocks up to 50 cm square and up to 20 cm thick. Two bonding techniques have been developed for fusing large segments of hot pressed silicon carbide together into a large monolith for constructing large optical structures without using a metallic braze. Bonding structure and bonding strength are discussed.

Paper Details

Date Published: 23 October 1995
PDF: 14 pages
Proc. SPIE 2543, Silicon Carbide Materials for Optics and Precision Structures, (23 October 1995); doi: 10.1117/12.225300
Show Author Affiliations
C. James Shih, Cercom, Inc. (United States)
Andris Ezis, Cercom, Inc. (United States)

Published in SPIE Proceedings Vol. 2543:
Silicon Carbide Materials for Optics and Precision Structures
Mark A. Ealey, Editor(s)

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