The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The morphological evolutions of FePt–X (segregant) thin films were studied by employing a 3-D phase field model. Numerical simulation results show that in the absence of substrate constraint related with elastic energy, the morphology of the FePt–X thin films significantly depends on the interfacial energy, film thickness, and anisotropic atomic mobility. The large interfacial energy between FePt...
Osmium-Ruthenium films were subjected to 1000 hours of close-spaced diode (CSD) testing and the film microstructures were evaluated in light of the CSD test results in order to generate improved film architectures for further CSD testing. Low knee temperatures correlated with a {10–10}/{10–11} film texture of annealed films.
Bi4Ti2.96Ta0.04O12 (BTTO) thin films were deposited on Pt(111)/Ti/SiO2/Si(100) substrates by sol–gel method. The effects of Ta-substitution and annealing temperature (500–800 °C) on the microstructure and ferroelectric properties of Bi4Ti3O12 thin films were investigated. X-Ray diffraction analysis reveals that the intensities of (117) peaks are realitively broad and weak at annealing temperatures...
Life testing of M-Type dispenser cathodes was performed for 1000 hours to help quantify the performance enhancement due to different osmium-ruthenium (Os-Ru) thin film microstructures. Os-Ru film microstructures were selected based on their potential to inhibit tungsten/Os-Ru interdiffusion as identified in previous studies. The results show that the 10 W substrate biased 150 nm thick film yielded...
We have studied the effect of laser repetition rate on the microstructure, crystallographic orientation, dielectric and ferroelectric properties of pulsed laser deposited 0.94(Bi0.5Na0.5)TiO3-0.04(Bi0.5K0.5)TiO3-0.02BaTiO3 thin films on SrRuO3 coated SrTiO3 substrates. The films were deposited at different repletion rates of 2 Hz, 4 Hz and 8 Hz, while the other processing parameters such as the substrate...
Osmium-ruthenium thin films were deposited on porous tungsten pellets, at the same time as cathode assemblies, to investigate possibilities for minimizing interdiffusion. Previous studies had identified promising film characteristics for inhibiting tungsten interdiffusion. For example, it was found that a 5W-substrate-biased film of 550 nm thickness exhibited high structural and compositional stability,...
Osmium-ruthenium (OsRu) thin films of different thickness were deposited on porous tungsten (W) pellets in a configuration similar to dispenser cathodes, using two separate sputtering systems. In order to assess which films may best inhibit interdiffusion between the OsRu film and the W substrate during annealing, the grain structure and texture of OsRu films were characterized by x-ray diffraction...
In this study, the nanocomposite Ti-Si-N thin films were prepared by reactive magnetron co-sputtering system. The Ti-Si-N film is a mixed composite consisting of the Ti-Si, Ti-N and Si-N compounds. The TiN phase is polycrystalline while SiNx is amorphous. As Si is added to the Ti-N compound to form Ti-Si-N, the microstructure becomes nanocrystalline grains embedded in an amorphous matrix i.e. nanocomposite...
Dispenser cathodes serve as electron sources in numerous vacuum devices, including traveling wave tubes and cathode ray tubes. These devices find use in commercial, military and space applications, requiring a long and reliable operating lifetime, especially for space-based operation. Semicon Associates, in Lexington, KY, leads this market, producing over 20,000 dispenser cathodes annually. The cathodes...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.