Download or read book Thermodynamics of Tellurium in Ferrous Alloys written by Gautam Gupta and published by . This book was released on 2003 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The objective of this project was to determine the solubility of tellurium in liquid and solid iron and iron-carbon alloys in the temperature range from 1273 K to 1673 K. The solubility of tellurium was measured in the austenite phase in solid iron, and also in iron-carbon and iron-carbon-manganese alloys in the liquid state."--Introduction, p. 2.
Download or read book Thermodynamics of Selenium and Tellurium in Molten Metallurgical Slags and Alloys written by Murray Johnston and published by . This book was released on 2007 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: There are a number of impurity elements present in sulphide ores that can have a deleterious effect on the properties of the final copper metal product. In this thesis, an equilibrium distribution technique was used to determine the thermodynamic behaviour of selenium and tellurium in molten slags used in copper production. Calcium ferrite based slags and copper or silver alloy were equilibrated in magnesia crucibles at temperatures of 1200 to 1400 °C and oxygen partial pressures of 10-11 to 10-0.68 atm. Under conditions typical of those employed during copper converting, the minor elements were found to enter the slag as negatively charged species. The partitioning of selenium and tellurium to the slag was greatest at high temperature, low oxygen partial pressure and at highest concentration of basic oxide (CaO or BaO). The experimentally derived data were combined with published information to calculate the selenide and telluride capacities of the slag, and also to generate fundamental thermodynamic activity data for selenium and tellurium in the slag phase. It was found that the activity coefficients of selenium and tellurium were independent of their concentration in the slag over the range studied, but were strongly dependent on the temperature, slag chemistry and oxidation state of the slag. Experiments were also designed and carried out to determine what effect the presence of iron oxide and its oxidation state has on the behaviour of selenium in the slag. A series of experiments involving iron oxide additions to a calcium aluminate slag was conducted under increasingly oxidising conditions to assess the effect of total iron on the selenide capacity as the dominant oxidation state of iron in the slag changed. It was shown that at a constant ratio of CaO:Al2O3, the selenide capacity increased with total iron in the slag. However, the effect on the selenide capacity did not appear any more significant as the Fe3+:Fe2+ ratio changed in a particular direction. 4 Another series of experiments was carried out with iron calcium silicate slags to determine the stability of phases within the slag, and how this affected the equilibrium distribution and activity coefficient of selenium in the slag. A number of solid phases were identified and their composition determined by scanning electron microscopy, energy dispersive spectroscopy and electron microprobe analysis. The composition and minor element content of the remaining liquid was calculated using a thermodynamic model. From this it was found that the capacity of the liquid slag has a region of independence against slag chemistry, before increasing strongly with increasing lime content to the calcium ferrite composition. Some of the implications of this work are discussed with reference to the practicality of adjusting the process variables in a large-scale industrial process for the purpose of managing minor element content of the molten phases. Considerations include the effect on copper recovery and rate of wear of furnace refractory materials.
Download or read book Thermodynamic Activity of Tellurium in Gold tellurium Alloys by Atomic Absorption written by Jugal Kishore Kanhaiyalal Malpani and published by . This book was released on 1973 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thermochemistry of Alloys written by H. Brodowsky and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 579 pages. Available in PDF, EPUB and Kindle. Book excerpt: The thermochemistry of alloys has interested generations of scientists and the subject was treated in classical textbooks long ago, e.g. by Hume-Rothery, by Wagner, and by Kubaschewski and Alcock. Nevertheless, the appearance of new materials and the desire to improve traditional materials and metallurgical processes has kept up demand for more information on the thermodynamics of these systems. The advent of computing power has created new opportunities to tie various aspects and properties together, such as phase diagrams and thermodynamic functions, that are in principle thermodynamically inter related but were too cumbersome to work out before. The computer has also been a powerful tool in buUding and testing models that help to explain the underlying causes of non-ideal behavior. At the same time, these calculations have pinpointed areas, where additional and more accurate data are needed. In the laboratory, new methods, improved materials, and sophistica ted instrumentation have gradually changed the way in which experiments are done. Within the time span of perhaps thirty years, the development went from jotting down individual readings of data points to strip chart recording to automatic digital data acquisition. Scholars and students active in the field of "Thermochemistry of Alloys" convened for a NATO Advanced Study Institute at Kiel in August 1987 to discuss these developments. This book collects most of the lectures and seminar papers given at the Institute.
Download or read book Applications of Process Engineering Principles in Materials Processing Energy and Environmental Technologies written by Shijie Wang and published by Springer. This book was released on 2017-02-07 with total page 549 pages. Available in PDF, EPUB and Kindle. Book excerpt: This collection offers new research findings, innovations, and industrial technological developments in extractive metallurgy, energy and environment, and materials processing. Technical topics included in the book are thermodynamics and kinetics of metallurgical reactions, electrochemical processing of materials, plasma processing of materials, composite materials, ionic liquids, thermal energy storage, energy efficient and environmental cleaner technologies and process modeling. These topics are of interest not only to traditional base ferrous and non-ferrous metal industrial processes but also to new and upcoming technologies, and they play important roles in industrial growth and economy worldwide.
Download or read book The Thermodynamic Properties of Various Liquid Ferrous Alloys written by Richard James Fruehan and published by . This book was released on 1966 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Performance Ferrous Alloys written by Radhakanta Rana and published by Springer Nature. This book was released on 2020-12-18 with total page 673 pages. Available in PDF, EPUB and Kindle. Book excerpt: The current state of understanding of emerging iron alloys and high-alloy ferrous systems, in comparison with some conventional steels, is compiled in this single volume to further their development. While most of the conventional steels are produced routinely today, many advanced high strength steels and iron-based alloys are still in the laboratory stage. The iron-based emerging alloys can yield high levels of mechanical and physical properties due to their new alloy concepts and novel microstructures leading to multiple benefits of their use in terms of sustainability and environmental impact. This book contains introductory chapters that present the requisite background knowledge on thermodynamics, phase diagrams, and processing routes used for the ferrous alloys to enable the readers a smooth understanding of the main chapters. Then, an overview of the conventional microalloyed steels and advanced high strength steels is given to present the benchmark of the existing steels and ferrous alloys manifesting their current state-of-the-art in terms of physical metallurgy and engineering applications. Subsequent chapters detail novel, emerging ferrous alloys and high-alloy ferrous systems. Summarizes the state-of-the-art of emerging iron-based alloys and the new processing and physical metallurgy-related developments of high-alloy iron systems; Explores new iron-based systems driven by the need for new properties, enhanced performance, sustainable processes and educed environmental impact; Compiles cutting-edge research on the progress of materials science of iron-based systems, from physical metallurgy to engineering applications, and possible avenues for future research.
Download or read book Thermodynamic Measurement Techniques written by Mohammad Shamsuddin and published by Springer Nature. This book was released on 2024 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers various techniques for measurement of thermodynamic quantities of materials such as enthalpy, free energy, and entropy. Techniques described herein include calorimetry, chemical equilibria, vapour pressure, and electrochemical analysis. The book covers general and solution thermodynamics in Chapters 1 and 2, respectively, and highlights the significance of various thermodynamic quantities required for materials characterization and development in Chapter 3. The author goes on to discuss different thermodynamic measurement techniques in detail (Chapters 4-8) together with a set of more than fifty worked-out problems related to classical as well as solution thermodynamics and measurement techniques. (Chapter 9). Topics include but are not limited to the following: The significance of various thermodynamic data required for selection and characterization of materials. The physicochemical principles involved in various thermodynamic measurement and on the evaluation of thermodynamic data by phase diagram analyses. The unique combination of calorimetry and chemical equilibrium for simultaneous determination of partial molar enthalpy and partial molar free energy of hydrogen in metals and alloys. The special technique based on the combination of vapor pressure and electrical conductivity to study the effect of tellurium vapor pressure on the mode of conduction in polycrystalline cadmium telluride.
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1976 with total page 1118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Thermodynamic Properties of Various Liquid Ferrous Alloys written by and published by . This book was released on 1983 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metallurgical Abstracts written by Institute of Metals and published by . This book was released on 1961 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Thermodynamics written by M L McGlashan and published by Royal Society of Chemistry. This book was released on 2007-10-31 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: Specialist Periodical Reports provide systematic and detailed review coverage of progress in the major areas of chemical research. Written by experts in their specialist fields the series creates a unique service for the active research chemist, supplying regular critical in-depth accounts of progress in particular areas of chemistry. For over 80 years the Royal Society of Chemistry and its predecessor, the Chemical Society, have been publishing reports charting developments in chemistry, which originally took the form of Annual Reports. However, by 1967 the whole spectrum of chemistry could no longer be contained within one volume and the series Specialist Periodical Reports was born. The Annual Reports themselves still existed but were divided into two, and subsequently three, volumes covering Inorganic, Organic and Physical Chemistry. For more general coverage of the highlights in chemistry they remain a 'must'. Since that time the SPR series has altered according to the fluctuating degree of activity in various fields of chemistry. Some titles have remained unchanged, while others have altered their emphasis along with their titles; some have been combined under a new name whereas others have had to be discontinued.
Download or read book Ferroalloys written by Mikhail Gasik and published by Springer Nature. This book was released on 2020-09-23 with total page 531 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book outlines the physical and chemical foundations of high-temperature processes for producing silicon, manganese and chromium ferroalloys, alloys of molybdenum, vanadium, titanium, alkaline earth and rare earth metals, niobium, zirconium, aluminum, boron, nickel, cobalt, phosphorus, selenium and tellurium, iron-carbon alloys by carbon, silicone and aluminothermic methods. The chapters introduce the industrial production technologies of these groups of ferroalloys, the characteristics of charge materials, and the technological parameters of the melting processes. A description of ferroalloy furnaces is given in detail. Topics such as waste recycling, fines agglomeration technologies, and environmental issues are considered.
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1967 with total page 1004 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of the Institute of Metals written by Institute of Metals and published by . This book was released on 1960 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thermodynamics in Physical Metallurgy written by American Society for Metals and published by . This book was released on 1950 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliographies of Interest to the Atomic Energy Program written by and published by . This book was released on 1962 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:
