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Proceedings Paper

Rapid fabrication of large mirror substrates by conversion joining of silicon carbide
Author(s): John Casstevens; Donald J. Bray; Abuagela Rashed; Ronald Plummer
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Paper Abstract

This paper describes POCO's new capability to rapidly produce large silicon carbide mirror substrates by conversion joining segments of silicon carbide during the process of converting graphite to silicon carbide. Mirror segments and structures are machined from a special graphite and subsequently joined together during the conversion process with the end result being a high purity beta silicon carbide structure. Interface boundaries are removed by the crystal growth across boundaries as the graphite crystal structure is converted to the larger crystal size of silicon carbide. Results of conversion joining development, design guidelines and limitations of the conversion joining process will be presented.

Paper Details

Date Published: 18 August 2005
PDF: 8 pages
Proc. SPIE 5868, Optical Materials and Structures Technologies II, 586801 (18 August 2005); doi: 10.1117/12.640872
Show Author Affiliations
John Casstevens, Dallas Optical Systems, Inc. (United States)
Donald J. Bray, Poco Graphite, Inc. (United States)
Abuagela Rashed, Poco Graphite, Inc. (United States)
Ronald Plummer, Poco Graphite, Inc. (United States)

Published in SPIE Proceedings Vol. 5868:
Optical Materials and Structures Technologies II
William A. Goodman, Editor(s)

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