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Showing 1 to 19 of 19 for “"ZrN"”.
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Odprašování prachových zrn a jeho vazba na procesy v kosmickém prostoru.
Název práce: Odprašování prachových zrn a jeho vazba na procesy v kosmickém prostoru Autor: Marek Vyšinka Katedra: Katedra fyziky povrchů a plazmatu Vedoucí disertační práce: prof. RNDr. Jana Šafránková, DrSc., Katedra fyziky povrchů a plazmatu Abstrakt: Značná část hmoty v kosmickém prostoru se …
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Effects of Xe ion irradiation of ZrN and the migration behaviour of implanted Eu
… its outstanding properties, zirconium nitride (ZrN) has been proposed as a possible candidate for inert matrix for transmutation of long-lived nuclear waste (plutonium and minor actinides) in fast nuclear reactors. In the nuclear reactor environment ZrN will be exposed to di erent irradiations …
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Reactive magnetron deposition and characterization of ZrN thin films for decorative and field emission applications
Zirconium nitrite (ZrN) films were deposited on substrates of Si<100>, Aluminium strip, brass strips and glass, by DC magnetron sputtering system under varying conditions of power, pressure, argon and nitrogen gas flow rates as well as temperature, and were characterized by SEM/EDX, AFM, Colour …
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Zirconium nitride contacts for cadmium telluride solar cells
CdTe/CdS solar cells were produced with ZrN as a back contact by magnetron sputtering. ZrN films have been produced with crystalline quality and uniformity on CdTe. With good crystalline quality and uniformity on substrate materials, ZrN films have a low resistivity of 12.3 to 22.0 μΩ-cm, …
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Untersuchungen zur Anwendbarkeit von Titannitrid- und Zirkonnitrid-Nanopartikeln als Farbpigmente und zum magnetischen Verhalten von Nickel-Nickeloxid-Kern-Hülle-Nanopartikeln
… of titanium nitride (TiN),zirconium nitride (ZrN), and nickel (Ni), respectively. All samples wereproduced with the nanoparticle beam apparatus LUCAS.In the first part, the focus mainly lies on the analysis of the optical andcolorimetric properties of TiN and ZrN nanoparticles and the …
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Využití magnetických částic při izolaci DNA z výrobků z obilovin
… Bylo zjištěno, že DNA izolovaná ze zrn cereálií, nakličených zrn a cereálních výrobků pomocí testovaných magnetických nosičů byla v kvalitě vhodné pro PCR.
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Development of Stage-I tempered high strength cast steel for ground engaging tools
… Size of ground Si-Zr addition controls final ZrN particle size. Good mechanical properties can be obtained if ZrN particle size is limited to 2μm. A high oxygen melt practice gave 35% improvement in notch toughness. A Mn-Si-Mo-V steel was formulated to minimize solidification shrinkage …
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Studium mechanických vlastností a mikrostruktury jemnozrnných polykrystalů Cu a slitin Cu
… je pro 8 průchodů téměř homogenní, s rovnoosými zrny velikostí přibližně 200nm. Intenzivní plastickou deformací došlo ke zjemnění zrna téměř 1000x. Ve vzorku po 8 průchodech je obsaženo asi 50% vysokoúhlových hranic zrn. Z termodynamického hlediska nedošlo deformací k výrazné změně korozních …
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Evaluation of metal nitrides and borides as alternative electrocatalyst support materials for polymer electrolyte fuel cells
… In this study, metal nitrides and borides (TiN, ZrN, TiB₂ , ZrB₂ and LaB₆) were evaluated as potential support materials, in an attempt to improve the durability and performance of PEFCs.
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Experimental technique for studying high-temperature phase equilibria in reactive molten metal based systems
… as pressed, premixed solid components, ZrO_2, ZrN, and Zr powders, were acoustically levitated inside an argon-filled chamber at one atmosphere and heated by a CO_2 laser. The levitating samples could be continuously laser heated for about 1 sec, resulting in local sample melting. The sample …
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Cellular Corrosion of CoCrMo Total Knee Implants: Understanding Underlying Mechanisms Through Retrieval Analysis and Simulated Inflammatory Conditions
… damage scares. CoCrMo, zirconium nitride (ZrN)coated, and Oxinium knee implants were intentionally damaged by electrocautery from both Bovie and Aquamantys sources by a three second hover method. Bovie electrocautery damage was done at 30W, 45W, and 60W. Aquamantys electrocautery damage was …
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Atomic mechanisms of stress formation of group IVB-VIB transition metal nitrides deposited by DC magnetron sputtering
… group IVB-VIB transition metal nitrides, namely; ZrNx, NbNx and WxNy. In an attempt to establish this understanding, we performed x-ray diffraction, transmission electron microscopy measurements (TEM), XRD-pole figure measurements, x-ray reflectometry, XRD-sin2Psi method, ex-situ and in-situ …
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Characterization and mitigation of crud at pressurized water reactor conditions
… indicating reduced crud adhesion, for TiC and ZrN coatings. The results roughly agree with London-van der Waals theoretical force predictions, suggesting that London-VDW forces are responsible for the adhesion of crud to fuel cladding. This knowledge can be useful in designing better …
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Base material electrocatalysts for oxygen cathodes in low temperature acid fuel cells
… electrocatalysts, while Ta, Ebonex, TaB, TaN, ZrN passivated via growth of a resistive film and ZrB2, TiB2 corroded. The cathodic oxygen currents on sputter-deposited Ni/Ta/C, Co/Ta/C and Fe/Ta/C coatings on a carbon cloth support decreased by 20%, 23% and 30%, respectively when 1 M CH3OH was …
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Development Of Titanium Nitride/molybdenum Disulphide Composite Tribological Coatings For Cryocoolers
… Nitrides of high-melting-point metals (e.g. TiN, ZrN) and diamond-like-carbon (DLC) are potential candidates for cryogenic applications as these coatings have shown good friction behavior and wear resistance at cryogenic temperatures. These coatings are known to have coefficient of friction less …
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Deposition and characterisation of (Ti,Zr) based hard compound and multi-layer PVD films.
… trials successfully produced a range of TiZrN, TiMoN and ZrMoN coatings of compositions in good agreement with Monte-Carlo simulation predictions. However, preferential poisoning of the high reactivity metal segments on TiMo and ZrMo targets was found to occur during high N[2] partial …
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Petrogenesis of the Mesoproterozoic anorthosite, syenite and carbonatite suites of NW Namibia and their contribution to the metasomatic formation of the Swartbooisdrif sodalite deposits
… Pl (An37-75) ± Ol ± Opx ± Cpx + Ilm + Mag + Ap ± Zrn. Ilmenite and pyroxene are surrounded by narrow reaction rims of biotite and pargasite. During the subsolidus stage sporadic coronitic garnet-orthopyroxene-quartz assemblages were produced. Thermobarometry studies on amphiboles yield …
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Iatrogenic Electrocautery Damage and Cellular-Based Corrosion of Total Joint Arthroplasty Biomaterials
… the greatest Rsk for the BP damaged areas. The ZrN had the smallest differences in Rz and Ra for both MP and BP damage areas compared to undamaged areas. SEM imaging displayed pitting in the regions intentionally damage with a MP or BP EC device. Backscatter EDS analysis found significant …