Hot-Working of Aluminum Oxide: II, Optical Properties

Autor:	D. J. Sellers, W. H. Rhodes, Thomas Vasilos
Rok vydání:	1975
Předmět:	Equiaxed crystals Birefringence Materials science business.industry Slip (materials science) Pole figure Optics Hot working Materials Chemistry Ceramics and Composites Sapphire Transmittance Crystallite Composite material business
Zdroj:	Journal of the American Ceramic Society. 58:31-34
ISSN:	1551-2916 0002-7820
DOI:	10.1111/j.1151-2916.1975.tb18976.x
Popis:	Polycrystalline Al2O3 fabricated into plates or shapes by hot-working techniques exhibits high in-line transmittance from 0.4 to 5.5 μm. Examination of the product by an inverse pole figure technique demonstrated a strong {0001} texture normal to the pressing direction for both equiaxed and textured microstructures. The crystallographic texture was attributed to the dominance of basal slip in deformation. A comparison of transmissivity in the 2 principal directions of a forged plate strongly suggested that a reduction of birefringence resulting from the crystallographic texture was partially responsible for the high transmissivity. The absorption coefficient at 4.5 μm was 0.15 mm-1, ∼ that for sintered Al2O3 and 5 times that for sapphire
Databáze:	OpenAIRE
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