Selected Topics in High Temperature Chemistry

Selected Topics in High Temperature Chemistry PDF Author: Ø. Johannesen
Publisher: Elsevier
ISBN: 1483291014
Category : Technology & Engineering
Languages : en
Pages : 412

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Book Description
The properties of materials at high temperature play a vital role in their processing and practical use. The real properties of materials at elevated temperatures are very often governed by defects in their structure. Lattice defects may consist of point defects like vacancies, interstitial atoms or substituted atoms. These classes are discussed in general and specifically for oxides, nitrides, carbides and sulfides. Defect aggregates, shear structures and adaptive structures are also described. Special attention is paid to hydrogen defects which seem to play an important role in several materials.Defects in solids lead to transport properties such as diffusion and conductivity. These themes are thoroughly treated in this book, with examples from various materials being provided. Special attention is paid to the transport properties of grain boundaries. In high temperature corrosion and other types of oxidation, the diffusion of atoms through the reaction products is often the rate limiting step of the reaction. This book takes the reader from the theoretical treatment of defects to applications in high temperature corrosion. Reactions between metals and pure oxygen lead to the formation of oxides on the surface, and the reaction rates may often be related to the diffusion coefficients of the oxide. However, in practical use alloys are subjected to other severe gaseous atmospheres which may often lead to accelerated attack on the material. The severest condition, namely where a salt deposit is combined with oxidizing gases, is called hot corrosion. This and other types of corrosion are also covered. Finally, a chapter is devoted to the prevention of corrosive attack on materials by the addition of rare earth metals.The book has been published in honour of Professor Per Kofstad on the occasion of his 60th birthday. Professor Kofstad has for many years been active in the field of high temperature chemistry in all its aspects, from basic and theoretical work to its application in high temperature corrosion of metals and alloys. The various chapters have been contributed by his friends and colleagues, all of whom are international experts in the field.

Selected Topics in High Temperature Chemistry

Selected Topics in High Temperature Chemistry PDF Author: Ø. Johannesen
Publisher: Elsevier
ISBN: 1483291014
Category : Technology & Engineering
Languages : en
Pages : 412

Get Book Here

Book Description
The properties of materials at high temperature play a vital role in their processing and practical use. The real properties of materials at elevated temperatures are very often governed by defects in their structure. Lattice defects may consist of point defects like vacancies, interstitial atoms or substituted atoms. These classes are discussed in general and specifically for oxides, nitrides, carbides and sulfides. Defect aggregates, shear structures and adaptive structures are also described. Special attention is paid to hydrogen defects which seem to play an important role in several materials.Defects in solids lead to transport properties such as diffusion and conductivity. These themes are thoroughly treated in this book, with examples from various materials being provided. Special attention is paid to the transport properties of grain boundaries. In high temperature corrosion and other types of oxidation, the diffusion of atoms through the reaction products is often the rate limiting step of the reaction. This book takes the reader from the theoretical treatment of defects to applications in high temperature corrosion. Reactions between metals and pure oxygen lead to the formation of oxides on the surface, and the reaction rates may often be related to the diffusion coefficients of the oxide. However, in practical use alloys are subjected to other severe gaseous atmospheres which may often lead to accelerated attack on the material. The severest condition, namely where a salt deposit is combined with oxidizing gases, is called hot corrosion. This and other types of corrosion are also covered. Finally, a chapter is devoted to the prevention of corrosive attack on materials by the addition of rare earth metals.The book has been published in honour of Professor Per Kofstad on the occasion of his 60th birthday. Professor Kofstad has for many years been active in the field of high temperature chemistry in all its aspects, from basic and theoretical work to its application in high temperature corrosion of metals and alloys. The various chapters have been contributed by his friends and colleagues, all of whom are international experts in the field.

Selected Topics in the Chemistry of Natural Products

Selected Topics in the Chemistry of Natural Products PDF Author: Raphael Ikan
Publisher: World Scientific
ISBN: 9812790780
Category : Science
Languages : en
Pages : 625

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Book Description
Labor is the most important of the three traditional factors of production (land, labor and capital), accounting for some 75 per cent of the GDP. It is therefore important to focus on issues of labor economics. In this book the approach taken will be that of the free market philosophy of libertarianism, the perspective that allows the maximum of freedom, consistent with the responsibility of all to respect the equal rights of all others. The position of this book on unions is unique outside of the libertarian movement, and this is indicative of its analysis of several other issues, such as minimum wages. For scholars on the left, it is almost true that unions can do no wrong (for Marxists, they do not do enough, but that is another story). Their role is to raise wages for the workingman, and this task is almost unstintingly applauded. Conservatives, on the other hand, oppose unions root and branch (except for their support of foreign wars, which is also another story). To this end they support a welter of regulations, designed to reduce their power: limitations of check offs, forced secret ballots, etc. For libertarians, the analysis depends, intimately, on whether or not these are voluntary organizations. If they are, there is no more justification for imposing secret ballots on them than to do so for the chess or garden club. If they are not, they should not be weakened by restrictions, but, rather, banned, and their leaders imprisoned.

High Temperature Oxidation and Corrosion of Metals

High Temperature Oxidation and Corrosion of Metals PDF Author: David John Young
Publisher: Elsevier
ISBN: 0081001193
Category : Technology & Engineering
Languages : en
Pages : 760

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Book Description
High Temperature Oxidation and Corrosion of Metals, Second Edition, provides a high level understanding of the fundamental mechanisms of high temperature alloy oxidation. It uses this understanding to develop methods of predicting oxidation rates and the way they change with temperature, gas chemistry, and alloy composition. The book focuses on the design and selection of alloy compositions which provide optimal resistance to attack by corrosive gases, providing a rigorous treatment of the thermodynamics and kinetics underlying high temperature alloy corrosion. In addition, it emphasizes quantitative calculations for predicting reaction rates and the effects of temperature, oxidant activities, and alloy compositions. Users will find this book to be an indispensable source of information for researchers and students who are dealing with high temperature corrosion. - Emphasizes quantitative calculations for predicting reaction rates and the effects of temperature, oxidant activities, and alloy compositions - Uses phase diagrams and diffusion paths to analyze and interpret scale structures and internal precipitation distributions - Presents a detailed examination of corrosion in industrial gases (water vapor effects, carburization and metal dusting, sulphidation) - Contains numerous micrographs, phase diagrams, and tabulations of relevant thermodynamic and kinetic data - Combines physical chemistry and materials science methodologies - Provides two completely new chapters (chapters 11 and 13), and numerous other updates throughout the text

Proceedings of the Tenth International Symposium on Molten Salts

Proceedings of the Tenth International Symposium on Molten Salts PDF Author: Richard T. Carlin
Publisher: The Electrochemical Society
ISBN: 9781566771597
Category : Science
Languages : en
Pages : 592

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Book Description


High Temperature Oxidation and Corrosion of Metals

High Temperature Oxidation and Corrosion of Metals PDF Author: David John Young
Publisher: Elsevier
ISBN: 008044587X
Category : Business & Economics
Languages : en
Pages : 593

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Book Description
The book is concerned with understanding the fundamental mechanisms of high temperature alloy oxidation. It uses this understanding to develop methods of predicting oxidation rates and the way they change with temperature, gas chemistry and alloy composition. The focus is on designing (or selecting) alloy compositions which provide optimal resistance to attack by corrosive gases. . Emphasises quantitative calculations for predicting reaction rates and the effects of temperature, oxidant activities and alloy compositions. . Uses phase diagrams and diffusion paths to analyse and interpret scale structures and internal precipitation distributions . Provides a detailed examination of corrosion in industrial gases (water vapour effects, carburisation and metal dusting, sulphidation) . Text is well supported by numerous micrographs, phase diagrams and tabulations of relevant thermodynamic and kinetic data . Combines physical chemistry and materials science methodologies.

Catalog of Technical Reports

Catalog of Technical Reports PDF Author: United States. Dept. of Commerce. Office of Technical Services
Publisher:
ISBN:
Category :
Languages : en
Pages : 850

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Book Description


Proceedings of the Eighth International Symposium on Molten Salts

Proceedings of the Eighth International Symposium on Molten Salts PDF Author: Robert J. Gale
Publisher:
ISBN: 9781566770170
Category : Science
Languages : en
Pages : 692

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Book Description


Molten Salts Chemistry

Molten Salts Chemistry PDF Author: Frederic Lantelme
Publisher: Newnes
ISBN: 0124017223
Category : Science
Languages : en
Pages : 592

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Book Description
Molten salts and fused media provide the key properties and the theory of molten salts, as well as aspects of fused salts chemistry, helping you generate new ideas and applications for fused salts.Molten Salts Chemistry: From Lab to Applications examines how the electrical and thermal properties of molten salts, and generally low vapour pressure are well adapted to high temperature chemistry, enabling fast reaction rates. It also explains how their ability to dissolve many inorganic compounds such as oxides, nitrides, carbides and other salts make molten salts ideal as solvents in electrometallurgy, metal coating, treatment of by-products and energy conversion.This book also reviews newer applications of molten salts including materials for energy storage such as carbon nano-particles for efficient super capacitors, high capacity molten salt batteries and for heat transport and storage in solar plants. In addition, owing to their high thermal stability, they are considered as ideal candidates for the development of safer nuclear reactors and for the treatment of nuclear waste, especially to separate actinides from lanthanides by electrorefining. - Explains the theory and properties of molten salts to help scientists understand these unique liquids - Provides an ideal introduction to this expanding field - Illustrated text with key real-life applications of molten salts in synthesis, energy, nuclear, and metal extraction

Bibliography on the High Temperature Chemistry and Physics of Gases and Gas-condensed Phase Reactions

Bibliography on the High Temperature Chemistry and Physics of Gases and Gas-condensed Phase Reactions PDF Author: International Union of Pure and Applied Chemistry. Commission on High Temperatures and Refractories
Publisher:
ISBN:
Category : Gases at high temperatures
Languages : en
Pages : 342

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Book Description


Molten Salts Handbook

Molten Salts Handbook PDF Author: George J. Janz
Publisher: Elsevier
ISBN: 0323144837
Category : Technology & Engineering
Languages : en
Pages : 613

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Book Description
Molten Salts Handbook focuses on the features, properties, and structure of molten salts. This book presents several topics in annotated bibliographic table form, including phase equilibria, chemical syntheses, and molten salt electrolytes. Organized into six chapters, this book starts with a tabular presentation of data of the physical properties, thermodynamic properties, electrochemical properties, practical features, as well as spectroscopy and structure of molten salts. This text then illustrates the design features of different experimental assemblies and provides information on the technique through a liberally annotated bibliography. Other chapters provide a chemical index, which offers a ready guide to the status of data over the entire range of interests. This book presents as well the properties of viscosity, density, surface tension, refractive index, and electrical conductance for different compounds as single salt melts. This book is a valuable resource for scientists and researchers from diverse fields, including theoretical and applied electrochemistry, inorganic coordination chemistry, and transition metal chemistry.