D. W. Hopkins – författare

An Introduction to the Electron Theory of Solids introduces the reader to the electron theory of solids. Topics covered range from the breakdown of classical theory to atomic spectra and the old quantum theory, as well as the uncertainty principle of Heisenberg and the foundations of quantum mechanics. Some problems in wave mechanics and a wave-mechanical treatment of the simple harmonic oscillator and the hydrogen atom are also presented. Comprised of 12 chapters, this book begins with an introduction to Isaac Newton''s theory of classical mechanics and how the scientists after him discounted his ideas. The discussion then turns to the spectrum of atomic hydrogen and the old quantum theory; Heisenberg''s uncertainty principle and the consequences of wave-particle duality; the foundations of quantum mechanics; and assemblies of atoms. Atoms in motion and statistical mechanics are also considered, along with simple models of metals and the band theory of solids. The final chapter presents some results of band theory, with particular reference to thermal ionization of impurity atoms and conductivity of metals. This monograph is primarily intended for students of any discipline.

High Temperature Brazing in Controlled Atmospheres provides a discussion regarding the fundamentals, applications, and the potential of the brazing process. Comprised of eight chapters, the book covers several topics concerning the metallurgical process in brazing. Chapter 1 discusses the general bonding techniques, while Chapter 2 talks about the factors that affect the design of components to be joined by brazing and the theoretical aspects of the process that will influence design. Chapter 3 provides advices about the availability and properties of filler metals used in brazing, while Chapter 4 discusses furnaces. Chapter 5 tackles the atmospheric factors to consider in brazing, and Chapter 6 covers the brazing process itself. Chapter 7 talks about the applications of brazing in various settings, and Chapter 8 deals with quality control. The book will be of great use for technicians, designers, and engineering students or any other professionals whose work involves the brazing process.

The Structures of Alloys of Iron: An Elementary Introduction provides an elementary review of some of the factors affecting the structures of alloys of iron, with examples illustrating points of interest. In view of the existence of books dealing with the technology and properties of iron alloys it was decided that the present book should be concerned only with the structures, and not with the properties of the alloys. In connection with steels it was thought best, in the space available, to deal only with those based on iron-carbon alloys. The book begins with chapters on the metal iron, the crystal structures of iron, the diffusion of iron and its alloys, and the intermetallic chemistry of iron. Subsequent chapters deal with the structure of steels, plain carbon steels, the structure of alloy steels, and cast irons. This book is intended for those wanting to make a general survey of the subject before undertaking a detailed study. The reader must understand clearly that much further work will be necessary before he can hope to understand properly even one class of the alloys of industry .

Liquid Fuels discusses the properties, classification, manufacturing, and practical use of liquid fuels. The book is organized into 10 chapters discussing the various aspects of liquid fuels, from source to storage. Chapters 1 and 2 present the main source of liquid fuels and other sources such as oil shales and coal. Chapter 3 illustrates the physical and chemical tests used to determine the properties of liquid fuels and the significance of these properties to the practical applications of the different types of fuels. Fuels for spark and compression ignition engines are discussed in Chapters 4 and 5. Chapter 6 presents the combustion and atomization of fuel oils. Chapters 7 to 9 enumerate the industrial and household uses of liquid fuels. The final chapter deals with the handling and storage of liquid fuels. Students of chemical engineering and metallurgy and people working at industries requiring the use of liquid fuels in their manufacturing processes will find the book useful.

Engineering Calculations in Radiative Heat Transfer is a six-chapter book that first explains the basic principles of thermal radiation and direct radiative transfer. Total exchange of radiation within an enclosure containing an absorbing or non-absorbing medium is then described. Subsequent chapters detail the radiative heat transfer applications and measurement of radiation and temperature.

An Introduction to Chemical Metallurgy, Second Edition introduces the reader to chemical metallurgy, including its fundamental principles and some of their applications. References in the text to a date and the author of some law or principle of physical chemistry are given for the sake of historical significance. This book is comprised of eight chapters and opens with an overview of thermodynamics, with particular emphasis on the first law of thermodynamics; the expansion of a gas; thermodynamically reversible changes; applications of thermochemistry in metallurgy; and experimental techniques in calorimetry. The following chapters focus on entropy, free energy, and chemical equilibrium; solutions and reaction kinetics; extraction and refining of metals, including refining by preferential oxidation; and corrosion and electrodeposition. Electrochemistry and interfacial phenomena are also explored, along with surface energy and surface tension, electrolytes and electrolysis, and reduction and oxidation potentials. This monograph is written primarily for chemists and metallurgists as well as students embarking on courses in chemical metallurgy.

Problems in Metallurgical Thermodynamics and Kinetics provides an illustration of the calculations encountered in the study of metallurgical thermodynamics and kinetics, focusing on theoretical concepts and practical applications. The chapters of this book provide comprehensive account of the theories, including basic and applied numerical examples with solutions. Unsolved numerical examples drawn from a wide range of metallurgical processes are also provided at the end of each chapter. The topics discussed include the three laws of thermodynamics; Clausius-Clapeyron equation; fugacity, activity, and equilibrium constant; thermodynamics of electrochemical cells; and kinetics. This book is beneficial to undergraduate and postgraduate students in universities, polytechnics, and technical colleges.

The Iron Blast Furnace: Theory and Practice presents theoretical, experimental, and operational evidence about the iron blast furnace as well as a mathematical description of its operation. This book includes a set of equations that accurately describe stoichiometric and enthalpy balances for the process and which are consistent with observed temperatures and compositions in the furnace stack. These equations, which have been devised on the basis of the Rist approach, show the effects of altering any blast-furnace variable on the other operating requirements of the process. This monograph is comprised of 14 chapters and begins with a brief description of the blast-furnace process. The next chapter takes a look inside the furnace, paying particular attention to its behavior in front of the tuyères and the kinetics of the coke gasification reaction. The reader is then introduced to the thermodynamics and stoichiometry of the blast-furnace process; enthalpy balance for the bottom segment of the furnace; the effects of tuyères injectants on blast-furnace operations; and blast-furnace optimization by linear programming. A number of important variables covered by the equations are discussed, including hydrocarbon injection at the tuyères, oxygen enrichment of the blast, moisture, limestone decomposition, coke reactivity, and metalloid reduction. The effects of many of these variables are illustrated numerically in the text while others are demonstrated in sets of problems that follow each chapter. This text will be a valuable resource for metallurgists and materials scientists.

The Iron Blast Furnace: Theory and Practice presents the significant role of iron blast furnace by which iron is efficiently and rapidly reduced from ore and it is the basis for all primary steelmaking. This book discusses the importance of blast-furnace process as a complete operation. Organized into 14 chapters, this book begins with an overview of the existing experimental, theoretical, and operational evidence about the blast furnace. This text then examines the blast furnace from the outside, including its size, production rate, products, raw materials, operation, and costs. Other chapters consider the primary objective of the blast furnace to produce molten iron of constant composition. This book discusses as well the operation of the furnace from the point of view of what happens to the raw materials after they enter the furnace. The final chapter deals with the linear programming methods by using the known physical constraints on industrial furnaces. This book is a valuable resource for engineers.

Production Gas Carburising discusses the aspects of gas carburising for practical application. The book covers the fundamentals up to the advance concepts of gas carburising. The first few chapters tackle the basic aspects of gas carburising, including its history and fundamental principles. Later chapter covers the much more advance concepts. The topics this book covers include reasons for case carburising; hardness and hardenability; residual stress; carburising theory; control for the carburising process; quality control; and aspects of safety. Professionals whose work includes carburising, such as design engineers, will find this book of great interest.

Principles and Applications of Tribology provides a mechanical engineering perspective of the fundamental understanding and applications of tribology. This book is organized into two parts encompassing 16 chapters that cover the principles of friction and different types of lubrication. Chapter 1 deals with the immense scope of tribology and the range of applications in the existing technology, and Chapter 2 is devoted entirely to the evaluation and measurement of surface texture. Chapters 3 to 5 present the fundamental concepts underlying the friction of metals, elastomers, and other materials. The principles of hydrodynamic lubrication are briefly discussed in Chapter 6, and the mechanisms of boundary and elastohydrodynamic lubrication are examined in Chapters 7 and 8. Chapter 9 is a generalized treatise on wear and abrasion phenomena in metals and elastomers, whereas Chapter 10 deals with the internal friction in solids, liquids, and gases. Chapter 11 is an abbreviated yet thorough treatment of experimental methods used in tribological studies. The remaining five chapters in this book are devoted to specific applications, including manufacturing processes, automotive applications, transportation, locomotion, bearing design, and miscellaneous. This book is an ideal source for mechanical engineering students.

Fundamentals of Metallurgical Processes, Second Edition reviews developments in the design, control, and efficiency of metallurgical processes. Topics covered include thermodynamic functions and solutions as well as experimental and bibliographical methods, heterogeneous reactions, metal extraction, and iron and steelmaking. This book is comprised of eight chapters and begins with an overview of the fundamentals of thermodynamics (functions, relationships, and behavior of solutions), followed by a discussion on methods of obtaining thermodynamic data from tables and graphs and by experiment. The kinetics of heterogeneous reactions in metallurgy are examined next, with particular reference to heterogeneous catalysis and mass transfer between immiscible liquid phases. The following chapters focus on the extraction of metals from oxides, sulfides, and halides; the production of iron and steel; the structure and properties of slags; slag/metal reactions; and equilibria in iron and steel production. The final chapter consists entirely of solved problems. This monograph will be of interest to metallurgists and materials scientists.

Modern Metallography focuses on the defects in the properties of metals, such as precipitates, cracks, grain boundaries, dislocations, stacking faults, and impurity atoms. The publication first offers information on reflected light microscopy and high temperature microscopy. Discussions focus on specimen preparation, defects of lenses, methods of increasing the resolving power of an objective, long working distance objectives, and typical hot-stage experiments. The text then elaborates on surface topography and polarizing microscope, including oblique illumination, interferometry, examination of anisotropic surfaces, and other uses of polarized light microscopy. The text takes a look at X-ray metallography and specialized X-ray diffraction techniques. Topics include Laue method and orientation, structure factor, powder method and the accurate measurement of lattice parameters, Bragg law, sheet textures, and preferred orientation. The publication further elaborates on electron microscopy and metallography at the atomic level. The manuscript is a valuable reference for students and readers interested in modern metallography.

International Series on Materials Science and Technology, Volume 14: Principles and Applications of Tribology focuses on the principles, methodologies, approaches, and applications of tribology. The publication first ponders on surface topography and friction of metals. Discussions focus on vacuum conditions, effects of sliding speed, hardening of metals, surface contaminants, metal transfer, elastic contact in metals, basic mechanism of friction, junction growth, photogrammetry, texture measurement, outflow meter, surface prints, and actual contact between surfaces. The text then elaborates on friction of elastomers and various materials and hydrodynamic and boundary lubrication. Topics include wettability and contact angle, adsorption of lubricants, molecular structure of boundary lubricants, boundary lubrication of metals, velocity distribution, hydrostatic lubrication, friction and wear of diamond, and viscoelasticity. The manuscript also examines bearing design, transportation and locomotion, and automotive applications. The publication is a vital source of information for researchers interested in tribology.

Elasto-Hydrodynamic Lubrication deals with the mechanism of elasto-hydrodynamic lubrication, that is, the lubrication regime in operation over the small areas where machine components are in nominal point or line contact. The lubrication of rigid contacts is discussed, along with the effects of high pressure on the lubricant and bounding solids. The governing equations for the solution of elasto-hydrodynamic problems are presented. Comprised of 13 chapters, this volume begins with an overview of elasto-hydrodynamic lubrication and representation of contacts by cylinders, followed by a discussion on equations relevant to lubrication, including the Reynolds equation. The reader is then introduced to lubrication of rigid cylinders; the importance of film thickness in highly loaded rigid contacts; the elasticity of solids in contact; and the theory of elasto-hydrodynamic lubrication. Subsequent chapters focus on apparatus and measurements of film thickness and film shape; friction and viscosity; and lubrication of gears and roller bearings. This book will be of interest to tribologists.

Extractive Metallurgy of Copper details the process of extracting copper from its ore. The book also discusses the significance of each process, along with the concerns in each process, such as pollution, energy demand, and cost. The text first provides an overview of the metallurgical process of copper extraction, and then proceeds to presenting the step-by-step representation of the whole process of copper extraction. The coverage of the book includes mineral beneficiation, roasting, smelting, converting, refining, casting, and quality control. The text will be of great use to metallurgists, materials engineers, and other professionals involved in mining industry.

Mineral Processing Technology, Third Edition: An Introduction to the Practical Aspects of Ore Treatment and Mineral Recovery details the fundamentals of contemporary ore processing-techniques. The title first introduces the basics of ore-processing, and then proceeds to tackling technical topics in the subsequent chapters. The text covers methods and procedures in ore handling, industrial screening, and ore sorting. The selection also deals with ore-processing equipment, such as crushers and grinding mills. The book will be of great use to students and professionals of disciplines involved in mining industry.

Principles of Metal Surface Treatment and Protection deals with the principles of metal surface treatment and protection. Topics covered range from electrodeposition and hot dip coating to diffusion and non-metallic coatings, as well as oxide and conversion coatings. The theory of corrosion protection is also discussed. Comprised of eight chapters, this volume begins with an overview of the corrosion of metals and the scope of protection against corrosion, followed by a detailed treatment of electrodeposition. The discussion then turns to the principles of hot dipping as a coating method; the formation of a diffusion coating; and the role of a non-metallic coating in corrosion protection. Subsequent chapters focus on the protection of oxide films against corrosion by means of anodizing, phosphatizing, and the use of tin free steel; testing and selection of a particular coating for corrosion resistance applications; and the theory of corrosion protection. This book is intended for metal-finishing scientists and students of metallurgy and metal finishing.

Analysis of Welded Structures: Residual Stresses, Distortion, and their Consequences encompasses several topics related to design and fabrication of welded structures, particularly residual stresses and distortion, as well as their consequences. This book first introduces the subject by presenting the advantages and disadvantages of welded structures, as well as the historical overview of the topic and predicted trends. Then, this text considers residual stresses, heat flow, distortion, fracture toughness, and brittle and fatigue fractures of weldments. This selection concludes by discussing the effects of distortion and residual stresses on buckling strength of welded structures and effects of weld defects on service behavior. This book also provides supplementary discussions on some related and selected subjects. This text will be invaluable to metallurgists, welders, and students of metallurgy and welding.

Provides practising engineers and students of mineral processing, metallurgy and mining with a review of the common ore-processing techniques utilized in modern installations. Each chapter encompasses all the recent technical developments within each field, and discusses new equipment and process routes. This latest edition has been thoroughly revised and updated to include important new sections on economics, use of computers and developments in froth flotation. A further feature is a valuable collection of microcomputer programs, written in ANSI BASIC, for the solution of numerical mineral processing problems. The work is fully referenced up to 1987, indexed, and SI units are used throughout.