989 resultados para LT AlN


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Bd. 1. A-K. -- Bd. 2. Omega. -- Bd. 3 Wörterbuch der griechischen Eigennamen.

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On verso: Major Carl K. Hart (center), second Commanding Officer, from June 28 to August 10, 1943, with Lt. C.D. Vaughn (left), and Lt. Ralph L. Bergh. Taken at Retreat in honor of Col. F.C. Rogers, Commandant, U.S. Army Forces, University of Michigan, July 2, 1943, on Ferry Field.

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1. Prüfung der Bisherigen System der Moral. -- 2. Darstellung und Prüfung des Kantischen Moralprinzips.

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Interface effects on ion-irradiation tolerance properties are investigated in nanolayered TiN/AlN films with individual layer thickness varied from 5 nm to 50 nm, prepared by pulsed laser deposition. Evolution of the microstructure and hardness of the multilayer films are examined on the specimens before and after He ion-implantation to a fluence of 4 × 10 m at 50 keV. The suppression of amorphization in AlN layers and the reduction of radiation-induced softening are observed in all nanolayer films. A clear size-dependent radiation tolerance characteristic is observed in the nanolayer films, i.e., the samples with the optimum layer thickness from 10 nm to 20 nm show the best ion irradiation tolerance properties, and a critical layer thickness of more than 5 nm is necessary to prevent severe intermixing. This study suggests that both the interface characteristics and the critical length scale (layer thickness) contribute to the reduction of the radiation-induced damages in nitride-based ceramic materials. © 2013 Elsevier B.V. All rights reserved.

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Single crystal platelets of AlN were successfully grown on 6H-SiC(0001) by a novel technique designed to suppress SiC decomposition, promote two-dimensional growth, and eliminate cracking in the AlN. X-ray diffractometry and synchrotron white beam X-ray topography demonstrate that the final AlN single crystal is of high structural quality.

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General note: Title and date provided by Bettye Lane.