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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 16 of 16 for “"Ni-C"”.
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Solute partitioning of Fe-Cr-Mn-Ni-C alloys during solidification
Thesis (Sc.D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1980.
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The effect of aging on the mechanical behavior of Fe-Ni-C martensites
Thesis. (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1988.
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Präparation von Ni-C-Multischichten und Mischsystemen mit dem PLD-Zweistrahlverfahren und Untersuchung der thermischen Stabilität der Schichtsysteme
… are produced on separated targets by two synchronized lasers. In the overlapping zone the direction of plasma expansion is changed by interaction of plasma particles. A diaphragm is used to guaranty that only the part of the plasma is deposited on the substrate that has changed the direction of …
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Preparation and characterisation of Pt/C and Ni/C modified electrocatalysts for use towards the oxygen reduction reaction for proton exchange membrane fuel cells
… market. Chapter 3 presents the preparation of Ni modified Pt/C catalysts (Ni(acac)2 and Ni(Cp)2) using the controlled surface modification technique. The resulting catalysts were heat treated at 200, 500, 750 and 900 °C and the catalysts were characterised by ICP-OES, TEM, EDX, CV, RDE, EXAFS …
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Dynamic Regulation of Ribosome Biogenesis and Its Role in Early Brain Development
… from the following previous published works: [1] Ni, C., and Buszczak, M. (2023a). The homeostatic regulation of ribosome biogenesis. Semin Cell Dev Biol 136, 13-26. [2] Ni, C., and Buszczak, M. (2023b). Ribosome biogenesis and function in development and disease. Development 150.
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Fabrication and characterization of multilayers for focusing hard x-ray optics
… important factor that must be controlled and minimized to achieve high reflectivity. The optimization of the process parameters led to interface widths ([sigma]) of 3.0-4.5 [angstroms] for both W/Si and Pt/C, the most interesting materials for this application. The other material combinations …
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Synthesis and Chemical Bonding of Lithium and Alkaline-Earth Metal-based Carbometallates
Organometallic molecules of nickel and palladium are typically employed as catalysts. Carbometallates are promising precursors for the synthesis of such organometallic compounds. Transition metal-to-carbon bonds are generally difficult to form in a typical organometallic synthesis. However in the …
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Mechanics, Design, and Fabrication of Metal-Graphene Composites
… decade, metal-graphene composites have seen significant progress and have received increasing attention because of graphene's ability to improve the mechanical properties. The main mechanism of improvement in metal graphene composite is based on the impeding of dislocations by graphene sheets. …
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Studies of the corrosion of materials for bipolar plates in fuel cells
… In addition to mild steel, stainless steel, nickel, electroplated Ni and Ni/graphite, the focus was on Ni-Cr alloys and the influence of composition on the rate of corrosion. The medium chosen was phosphoric acid pH 2 at 353 K and a potential of + 100 mV was considered in order to mimic the …
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High Pressure Melting of Iron with Nonmetals Sulfur, Carbon, Oxygen, and Hydrogen: Implications for Planetary Cores
… core, indicating a composition of 86% iron, 4% nickel, and 10% light elements. Any potential candidate for the major light element core component must meet two criteria: first, it must have high cosmic abundances and second, it must be compatible with Fe. Given these two constraints there are …
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Dry sliding and contact fatigue behavior of different high density Ni-Cu-Mo PM Steels
… and the Department of Industrial Engineering of University of Trento started a cooperation to investigate the wear and contact fatigue properties of PM steels. Wear is one of the most important factors that limit the life of engineering components in different ways. In this research two very …
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Investigation of the properties of iron-bearing alloys and silicates and their implications for the Earth’s lower mantle and core
… high-spin – low-spin crossover in (Mg,Fe)O is nicely described in literature, the electronic state of iron in silicate perovskite at high pressures and temperatures remains controversial. Conclusions derived from the results of X-ray emission (XES) and nuclear forward scattering (NFS) …
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The Thermal Stabilisation of Austenite at Sub-Zero Temperatures
… relating to the thermal stabilisation of austenite has been reviewed with particular reference to the mechanisms proposed by various workers to account for the phenomenon. The complex interactions between martensite transformation and stress have also been discussed in order to assess the …
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Estudio de la interacción del hidrógeno y del carbono en interfaces de aleaciones de uso industrial
… Se analizó mediante cálculos teóricos a nivel DFT la adsorción de CO sobre una superficie FeNi(111). Se observó que las interacciones Ni-C y Fe-C provocan un debilitamiento del 15% en el enlace metálico, lo que se conoce generalmente como fragilización por decohesión de la matriz …
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Studying the kinetics and mechanism of the formation and degradation of electrocatalysts using in situ characterization techniques
… will become more expensive as the supplies diminish. As the demand in energy rises (by 70% by 2040 per an estimate by the International Energy Agency) and the looming threat of climate change becomes more evident through rising sea level and record high temperatures, renewable energy is …
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Mixed-valence bimetallic dithiolates of iron, cobalt, and nickel and their relevance to the hydrogenases
… is of utmost importance for countless microorganisms. The performance of these enzymes exceeds that of the leading artificial catalyst used by humans: platinum. Though platinum based catalysts are currently the best, the scarcity of this metal makes widespread utilization unfeasible. Nature, by …