CONFERENCE PROCEEDINGS
Advanced Search
Home > Journals > Opt. Eng. > Volume 50 > Issue 7 > Article
Open Access
1 July 2011 Densification of silicon carbide using oxy-nitride additives for space-based telescope mirror applications
R. Suresh Kumar, Anoop K. Shukla, Sankaranarayanan Babu, Dhenuvakonda Sivakumar, Ashutosh S. Gandhi
Author Affiliations +
Optical Engineering, Vol. 50, Issue 7, 070504 (July 2011). https://doi.org/10.1117/1.3610987
Abstract
Densification behavior of alpha silicon carbide (SiC) during vacuum hot pressing was studied up to 1900ºC with sintering additives based on AlN and Y2O3 in different proportions. Near theoretical density was obtained with a total sintering additive content of < 4 vol.%. The microstructure of SiC sintered with AlN+Y2O3 revealed fine equiaxed grains against the additional elongated grains exhibited by SiC sintered with AlN alone. The SiC having high density exhibited very good strength, elastic modulus, high thermal conductivity, low coefficient of thermal expansion and excellent polishability for telescope mirror applications.
©(2011) Society of Photo-Optical Instrumentation Engineers (SPIE)
Citation Download Citation
R. Suresh Kumar, Anoop K. Shukla, Sankaranarayanan Babu, Dhenuvakonda Sivakumar, and Ashutosh S. Gandhi "Densification of silicon carbide using oxy-nitride additives for space-based telescope mirror applications," Optical Engineering 50(7), 070504 (1 July 2011). https://doi.org/10.1117/1.3610987
Published: 1 July 2011
JOURNAL ARTICLE
 4 PAGES
DOWNLOAD PAPER SAVE TO MY LIBRARY
GET CITATION
Lens.org Logo
CITATIONS
Cited by 4 scholarly publications.
Advertisement
Advertisement
RIGHTS & PERMISSIONS
Get copyright permission  Get copyright permission on Copyright Marketplace
KEYWORDS
Silicon carbide
Aluminum nitride
Mirrors
Space telescopes
Polishing
Surface finishing
Chemical vapor deposition
RELATED CONTENT
Development of silicon carbide mirrors the example of the...
Proceedings of SPIE (November 21 2017)
A new concept in telescope design SIC as the only...
Proceedings of SPIE (April 03 2018)
Polishing and testing of the 1.5 m SiC M1 mirror...
Proceedings of SPIE (September 25 2008)
CVC silicon carbide high-performance optical systems
Proceedings of SPIE (October 14 2004)
Overview of the production of sintered SiC optics and optical...
Proceedings of SPIE (August 18 2005)
Development of the SOFIA silicon carbide secondary mirror
Proceedings of SPIE (March 03 2003)
Subscribe to Digital Library
Receive Erratum Email Alert
Back to Top