26 February 1982 Nitrogen-Stabilized Aluminum Oxide Spinel (ALON)
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Abstract
A new ceramic, nitrogen-stabilized aluminum oxide spinel (ALON), has been developed at AMMRC which may have distinct advantages over sintered polycrystalline a-A1203. This material is isotropic and has been fabricated into dense, transparent bodies with the following properties: Knoop (100) hardness of 1800, elastic modulus of 46x106 psi, a room temperature fracture strength of 45x103 psi, a dielectric constant and loss tan%ent, respectively, at 10 MHz of 8.56 and 0.0004, trivial oxidation in air up to 1200 C and IR cutoff at 5.2 μm, and an average thermal expansion coefficient (a) of 7.00x10-6C -1 (25°C-1000°C).
© (1982) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Normand D. Corbin, James W. McCauley, "Nitrogen-Stabilized Aluminum Oxide Spinel (ALON)", Proc. SPIE 0297, Emerging Optical Materials, (26 February 1982); doi: 10.1117/12.932479; https://doi.org/10.1117/12.932479
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