Rapid fabrication of large mirror substrates by conversion joining of silicon carbide

John Casstevens; Donald J. Bray; Abuagela Rashed; Ronald Plummer

doi:10.1117/12.640872

18 August 2005 Rapid fabrication of large mirror substrates by conversion joining of silicon carbide

John Casstevens, Donald J. Bray, Abuagela Rashed, Ronald Plummer

Proceedings Volume 5868, Optical Materials and Structures Technologies II; 586801 (2005) https://doi.org/10.1117/12.640872
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

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.

Citation Download Citation

John Casstevens, Donald J. Bray, Abuagela Rashed, and Ronald Plummer "Rapid fabrication of large mirror substrates by conversion joining of silicon carbide", Proc. SPIE 5868, Optical Materials and Structures Technologies II, 586801 (18 August 2005); https://doi.org/10.1117/12.640872

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