Polycrystalline alumina for aerodynamic IR domes and windows

Mark V. Parish; Marina R. Pascucci

doi:10.1117/12.818158

11 May 2009 Polycrystalline alumina for aerodynamic IR domes and windows

Mark V. Parish, Marina R. Pascucci

Proceedings Volume 7302, Window and Dome Technologies and Materials XI; 730205 (2009) https://doi.org/10.1117/12.818158
Event: SPIE Defense, Security, and Sensing, 2009, Orlando, Florida, United States

Abstract

CeraNova's transparent polycrystalline alumina (CeraLumin^TM)a has sub-micron grain size (300-500nm) and high transmittance in the mid-wave infrared (>85% in the 3-5µm MWIR region). The fine, uniform grain size imparts high hardness, high strength, and high thermal shock resistance. Polycrystalline alumina is a viable alternative to sapphire for domes, particularly for aerodynamic shapes which are readily fabricated by powder processing. Both hemispheric and ogive domes (sub-scale and full-size) have been successfully molded and densified to transparency. Hemispheric domes have been optically finished. Current efforts include a focus on scale-up, fabrication, and metrology of aerodynamic domes. This paper presents recent analyses of microstructure, optical properties, and mechanical properties.

Citation Download Citation

Mark V. Parish and Marina R. Pascucci "Polycrystalline alumina for aerodynamic IR domes and windows", Proc. SPIE 7302, Window and Dome Technologies and Materials XI, 730205 (11 May 2009); https://doi.org/10.1117/12.818158

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