Download or read book Kinetics of Oxidation of Metal Powders written by H. Edward Flanders and published by . This book was released on 1956 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Oxidation Kinetics of Metallic Powders written by Hongqi Nie and published by . This book was released on 2016 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aluminum and magnesium are widely used in pyrotechnic formulations and other energetic materials; they are also common components of reactive alloys, e.g., Al-Mg and B-Mg, and others, which are potential fuels for explosives and propellants. Reaction mechanisms and oxidation kinetics of aluminum, magnesium and Al-Mg alloy powders in different oxidizing environments are investigated using thermo-analytical measurements. New methods of data processing are developed, relying on measured particle size distributions of the reactive spherical powders. It became possible to identify the reaction interface location for many heterogeneous metal oxidation processes; for several reactions, detailed kinetic descriptions are obtained. For aluminum powders, location of the reaction interface is established for oxidation in steam and liquid water. Stage-wise oxidation behavior is observed and interpreted. The oxidation of aluminum covered by a thin natural oxide layer in oxygen occurring at relatively low temperatures is quantitatively characterized using different types of thermo-gravimetric (TG) measurements with increased amount of powder for greater sensitivity. Activation energy and the pre-exponent are determined as a function of reaction progress using isoconversion processing and assuming a diffusion-limited reaction mechanism. The reaction kinetics is also established for aluminum nanopowders. It is shown that the oxidation mechanism established for micron sized aluminum remains valid for particles as small as 10 nm. Aluminum oxidation model is combined with a heat transfer model to describe ignition of aluminum particles exposed to a heated oxidizing environment. For magnesium powders, their oxidation by both oxygen and steam was studied by thermo-analytical measurements for micron-sized powders. The location of reaction interface is identified using experiments with spherical powders with different but overlapping particle size distributions. The reaction is found to occur at the interface of metal and the growing oxide layer for all oxidizing conditions. Thus, the reaction is rate limited by diffusion of oxidizer to the metal surface. Reaction rates for low and elevated temperatures are quantified using heat flow calorimetry and TG measurements, respectively. Simplified diffusion-limited reaction models are developed for oxidation of magnesium in both oxygen and steam. The models enable one to predict both pre-ignition reactions and the time of Mg powder aging when exposed to moisture or oxygen at different temperatures. Finally, the mechanisms of low-temperature, heterogeneous oxidation of differently prepared Al-Mg alloy powders in oxygen are studied using thermo-gravimetric measurements. Fully and partially oxidized samples are recovered and characterized using scanning electron microscopy and x-ray diffraction. Voids grow within oxidized alloy powders for both atomized and mechanically alloyed powders. Two oxidation stages are identified for both alloy powders. Both magnesium and aluminum are oxidized at first oxidation stage, producing MgO and amorphous alumina. Spinel MgAl2O4 is produced during the second stage. The reaction is found to occur at the internal surface of the oxide shell as determined by matching the oxidation dynamics for particles with the same size but belonging to powders with different particles size distributions. Apparent activation energies for both oxidation stages are obtained as a function of the thickness of the growing oxide layer. The switchover between oxidation stages occurs when the spinel structure starts forming.

Download or read book Handbook of Non Ferrous Metal Powders written by Oleg D Neikov and published by Elsevier. This book was released on 2009-02-24 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt: The manufacture and use of the powders of non-ferrous metals has been taking place for many years in what was previously Soviet Russia, and a huge amount of knowledge and experience has built up in that country over the last forty years or so. Although accounts of the topic have been published in the Russian language, no English language account has existed until now. Six prominent academics and industrialists from the Ukraine and Russia have produced this highly-detailed account which covers the classification, manufacturing methods, treatment and properties of the non-ferrous metals ( aluminium, titanium, magnesium, copper, nickel, cobalt, zinc, cadmium, lead, tin, bismuth, noble metals and earth metals). The result is a formidable reference source for those in all aspects of the metal powder industry. Covers the manufacturing methods, properties and importance of the following metals: aluminium, titanium, magnesium, copper, nickel, cobalt, zinc, cadmium, noble metals, rare earth metals, lead, tin and bismuth Expert Russian team of authors, all very experienced English translation and update of book previously published in Russian

Download or read book Kinetics of Metal Gas Interactions at Low Temperatures written by Eckehard Fromm and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 219 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents experimental data and recent results of model calculations on the formation of natural oxide film on metal surfaces and of metal hydride formation. Such films are responsible for corrosion, friction, and wear of metallic materials. Describing mostly the authors own research, this monograph gives an overview of models suitable for metal-gas reactions and demonstrates how complex metal-gas interactions can be analyzed by standard procedures of chemical kinetics. The book, and the data and equations it contains, will be useful to researchers in surface science, condensed-matter physics, and materials science.

Download or read book Catalog of Technical Reports written by United States. Dept. of Commerce. Office of Technical Services and published by . This book was released on with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Oxidation of Tungsten written by Vincent David Barth and published by . This book was released on 1961 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report presents a detailed review of available information on the oxidation of W and its alloys. W is relatively inert below 700 C. As the temperature is increased above this level, however, oxidation becomes progressively more rapid, reaching catastrophic rates at temperatures around 1200 C and above. Various theories for the mechanism and rates of W oxidation at different temperatures are reviewed, and the effect of pressure and water vapor on the stability of W oxides is discussed in detail. The elevatedtemperature reactions of W with other materials, such as refractory oxides, and with gases other than oxygen also are covered. Information on the protection of W by alloying and coating is included. (Author).

Download or read book Zirconium Corrosion written by and published by . This book was released on 1960 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Kinetics of Oxidation of Metals written by James K. Lee and published by . This book was released on 1952 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Handbook of Materials Selection written by Myer Kutz and published by John Wiley & Sons. This book was released on 2002-07-22 with total page 1524 pages. Available in PDF, EPUB and Kindle. Book excerpt: Erstmals in einem Band werden Werkstoffe hier (in zwei getrennten Systemen) sowohl nach ihrer technischen Anwendung als auch nach ihren Eigenschaften geordnet. - Benutzer können deshalb zunächst nach der Gruppe von Materialen suchen, die für eine spezielle Anwendung geeignet sind, und anschließend Details über jedes einzelne Material finden - Suchkriterien sind Eigenschaften wie Wärmeleitfähigkeit, optisches Reflexionsvermögen, Elastizität usw. und Anwendungsgebiete wie Bauwesen, Biomedizin, Fahrzeugbau, Luftfahrttechnik, Elektrotechnik usw. - berücksichtigt werden sowohl herkömmliche Werkstoffe (Eisen- und Nichteisenmetalle, Kunststoffe, Klebstoffe) als auch Kompositwerkstoffe und synthetische Materialen wie Laminate, Fasern und Keramiken

Download or read book Federal Grants and Contracts for Unclassified Research in the Physical Sciences written by and published by . This book was released on 1955 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Handbook of Heterogenous Kinetics written by Michel Soustelle and published by John Wiley & Sons. This book was released on 2013-03-04 with total page 674 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents all the theoretical and practical basements of heterogeneous kinetics and reactivity of solids. It applies the new concepts of reactivity and spatial function, introduced by the author, for both nucleation and growth processes, with a unified presentation of the reactivity of bulk and powder solids, including gas-solid reactions, thermal decompositions, solid-solid reactions, reactions of solid solutions, and coalescence of solid grains. It also contains many exercises and problems with solutions included, allowing readers to understand and use all the concepts and methods discussed therein.

Download or read book Proceedings written by Utah Academy of Sciences, Arts, and Letters and published by . This book was released on 1967 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book High temperature Oxidation of Metals written by Per Kofstad and published by . This book was released on 1966 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1989 with total page 1134 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Metal Nanopowders written by Alexander A. Gromov and published by John Wiley & Sons. This book was released on 2014-05-19 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written with both postgraduate students and researchers in academia and industry in mind, this reference covers the chemistry behind metal nanopowders, including production, characterization, oxidation and combustion. The contributions from renowned international scientists working in the field detail applications in technologies, scale-up processes and safety aspects surrounding their handling and storage.

Download or read book TMS 2013 142nd Annual Meeting and Exhibition written by The Minerals, Metals & Materials Society (TMS) and published by John Wiley & Sons. This book was released on 2013-02-22 with total page 1238 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presenting papers from the 2013 annual meeting of The Minerals, Metals & Materials Society (TMS), this volume covers developments in all aspects of high temperature electrochemistry, from the fundamental to the empirical and from the theoretical to the applied.

Download or read book Metal Oxide Powder Technologies written by Yarub Al-Douri and published by Elsevier. This book was released on 2020-06-02 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal Oxide Powder Technologies: Fundamentals, Processing Methods and Applications reviews the fundamentals, processing methods and applications of this key materials system. Topics addressed comprehensively cover chemical and physical properties, synthesis, preparation, both accepted and novel processing methods, modeling and simulation. The book provides fundamental information on the key properties that impact performance, such as particle size and crystal structure, along with methods to measure, analyze and evaluate. Finally, important applications are covered, including biomedical, energy, electronics and materials applications. Provides a comprehensive overview of key topics both on the theoretical side and the experimental Discusses important properties that impact metal oxide performance, processing methods (both novel and accepted), and important applications Reviews the most relevant applications, such as biomedical, energy, electronics and materials applications