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Author :
Publisher :
ISBN 13 :
Total Pages : 161 pages
Book Rating : 4.:/5 (94 download)
Download or read book Production of Metal Powder with Gas Atomization Process by an Atomizer with Internal Confinement Configuration written by and published by . This book was released on 2015 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Alan Lawley
Publisher :
ISBN 13 :
Total Pages : 184 pages
Book Rating : 4.3/5 (91 download)
Download or read book Atomization written by Alan Lawley and published by . This book was released on 1992 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : John K. Beddow
Publisher :
ISBN 13 :
Total Pages : 128 pages
Book Rating : 4.3/5 (91 download)
Download or read book The Production of Metal Powders by Atomization written by John K. Beddow and published by . This book was released on 1978 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : mohammadreza haghighatjoo
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (139 download)
Download or read book A Numerical Investigation of Free-fall Swirling Gas Atomization Process written by mohammadreza haghighatjoo and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gas atomization is a complex multi-physics route in the powder production field. Fine spherical metal powders can be produced using this technique via atomizing superheated molten metals. In the powder production industry, free-fall gas atomizer is often used for the melt atomization. The most significant advantage of using this type of atomizer is that it avoids melt build-up in the vicinity of gas and melt nozzle exits; the problem which is much more pronounced in the close-coupled gas atomizers. Obtaining smaller particle median diameter (d50) and narrower particle size distribution (PSD) have been the major manufacturing challenge. In the present work, a numerical parametric study is carried out on the atomization process variables of a novel layout of free-fall atomizer in order to reduce d50 and narrow down PSD. The used free-fall atomizer features a swirl motion of gas stream which allows the breakup point of the molten jet to be located at a closer distance to the die and benefits the most from the kinetic energy of the gas jets. A two-way coupled Eulerian-Lagrangian approach is utilized. Ideal gas law and k-epsilon turbulence model are employed to simulate the gas flow. In addition, the adaptive mesh refinement (AMR) technique is used to refine the computational domain locally and model the supersonic jet flow more accurately. The number of cells in the domain reaches around 40 million, and five to six shock diamonds are captured using this technique. To model the discrete (particulate) phase, the effects of Reynolds, Mach, and Knudsen numbers on the drag coefficient and Nusselt number on heat transfer are included. Moreover, Kelvin-Helmholtz Rayleigh-Taylor (KHRT) breakup model is used to simulate the molten metal atomization process. It is found that under the same operating condition, the increase in gas to melt ratio (GMR) and number of nozzles result in a smaller d50 and narrower PSD. This numerical analysis also investigates the effect of change in a range of radial and swirl angles. It is observed that increasing the radial angle and decreasing the swirl angle could narrow down the particle size distribution and reduce the particle median diameter.
Author : Andrew J. Yule
Publisher : Oxford University Press, USA
ISBN 13 :
Total Pages : 432 pages
Book Rating : 4.3/5 (91 download)
Download or read book Atomization of Melts written by Andrew J. Yule and published by Oxford University Press, USA. This book was released on 1994 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first authoritative treatment of the atomization of melts for metal powder production is offered in this book. The unique approach unifies the science, applications and other aspects of this interdisciplinary field, and will be of great interest to research scientists and engineers, aswell as industrial practitioners of the various processes. Related fields of spray forming and coating processes and the atomization of non-metallic melts such as ceramics are also covered.
Author : Daniel Heartly Lanham
Publisher :
ISBN 13 :
Total Pages : 65 pages
Book Rating : 4.:/5 (278 download)
Download or read book Production of Metal Powders by Gas Atomization written by Daniel Heartly Lanham and published by . This book was released on 1992 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : 林天柱
Publisher :
ISBN 13 :
Total Pages : 228 pages
Book Rating : 4.:/5 (774 download)
Download or read book Production of Metal Powder by Atomization Processes with Internal Impinging Mechanism written by 林天柱 and published by . This book was released on 2006 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Kevin Dwayne Hamann
Publisher :
ISBN 13 :
Total Pages : 80 pages
Book Rating : 4.:/5 (25 download)
Download or read book Production of Metal Powders Using Upward Gas Atomization written by Kevin Dwayne Hamann and published by . This book was released on 1991 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : John Keith Beddow
Publisher :
ISBN 13 : 9780598095923
Total Pages : 106 pages
Book Rating : 4.0/5 (959 download)
Download or read book The Production of Metal Powders by Atomization written by John Keith Beddow and published by . This book was released on 1978 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Nasser Ashgriz
Publisher : Springer Science & Business Media
ISBN 13 : 1441972641
Total Pages : 922 pages
Book Rating : 4.4/5 (419 download)
Download or read book Handbook of Atomization and Sprays written by Nasser Ashgriz and published by Springer Science & Business Media. This book was released on 2011-02-18 with total page 922 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atomization and sprays are used in a wide range of industries: mechanical, chemical, aerospace, and civil engineering; material science and metallurgy; food; pharmaceutical, forestry, environmental protection; medicine; agriculture; meteorology and others. Some specific applications are spray combustion in furnaces, gas turbines and rockets, spray drying and cooling, air conditioning, powdered metallurgy, spray painting and coating, inhalation therapy, and many others. The Handbook of Atomization and Sprays will bring together the fundamental and applied material from all fields into one comprehensive source. Subject areas included in the reference are droplets, theoretical models and numerical simulations, phase Doppler particle analysis, applications, devices and more.
Author : Ali Asgarian
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (133 download)
Download or read book Physical and Mathematical Modeling of Water Atomization for Metal Powder Production written by Ali Asgarian and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Water atomization (WA) of a molten metal is a well-established and cost-effective industrial approach to producing low-reactive metal powders. However, WA powders are characterized by a wide spread of particle size unsuitable for certain powder metallurgy applications. To address this limitation, this thesis examines some of the poorly understood fluid mechanics phenomena involved in WA, to develop fundamental knowledge that describes the relationships between the design and operating conditions of a water atomizer, and the particle size distribution (PSD) of the resulting powder. In the first part of the thesis, a flat fan water spray is studied by experiment and computational fluid dynamics (CFD) simulation. The disintegration of a liquid sheet into a spray is examined, an optical technique to measure a multi-range droplet size distribution (DSD) in a developing spray is presented, and an enhanced model to quantify the momentum flux of a spray where it impinges a melt stream is proposed. The model suggests that the momentum flux of a spray, and thus the atomization capacity, increases with spray pressure and decreases with the travel distance of the spray from the nozzle to the impingement point and with the spray spreading angle. In the second part of the thesis, the above findings are examined via production of a low melting point alloy (Bi-42% Sn) powder using a laboratory-scale water atomizer that was designed and built for this work. The effects of various design and operating parameters, including water pressure, melt superheat, apex angle, and spray configuration on the mass median size (d50) and standard deviation (SD) of the powder PSD are investigated, and correlations proposed. These correlations can be used to control the size features of water atomized powders produced at industrial scale, by engineering various design and operating parameters, and thus expanding the market for water atomized powders.
Author : Christopher Wayne Potts
Publisher :
ISBN 13 :
Total Pages : 178 pages
Book Rating : 4.:/5 (993 download)
Download or read book Development of a Centrifugal Atomizer written by Christopher Wayne Potts and published by . This book was released on 2017 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: Powder metallurgy is a widely used process specializing in the creation of unique alloys and metal matrix composites (MMCs) that cast and wrought alloy processing techniques cannot achieve. Production of metal powders, however, can be cost prohibitive when considering small production runs. Some techniques, such as gas atomization, are necessary for producing clean, spherical powders, but these pristine powders are not always required, depending on the post-processing technique that will be employed. For example, during cryomilling the pristine nature of the metal feedstock powders is destroyed from ball milling in a slurry of liquid nitrogen or argon. Building on the work of previous research, we have designed a machine capable of generating inexpensive, irregularly shaped powder metals suitable for further processing. Design of the centrifuge was based off the findings from investigating two different analytical models with the results verified by computational fluid dynamics (CFD) for powder formation in the centrifuge chamber. The analytical models agree within 3% of one another and within 11% of the CFD model. The machine has been designed and developed to be built for under $15,000 to meet the criteria given to be considered "inexpensive."
Author : P. Ramakrishnan
Publisher : New Age International
ISBN 13 : 8122420303
Total Pages : 40 pages
Book Rating : 4.1/5 (224 download)
Download or read book Powder Metallurgy written by P. Ramakrishnan and published by New Age International. This book was released on 2007 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Papers presented at the International Conference on Powder Metallurgy for Automotive and Engineering Industry, held at Mumbai during 3-6 February 2005.
Author : Khershed P. Cooper
Publisher :
ISBN 13 :
Total Pages : 338 pages
Book Rating : 4.X/5 (4 download)
Download or read book Liquid Metal Atomization: Fundamentals and Practice written by Khershed P. Cooper and published by . This book was released on 2000 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : ASM International. Handbook Committee
Publisher : ASM International
ISBN 13 : 0871702835
Total Pages : 1313 pages
Book Rating : 4.8/5 (717 download)
Download or read book Engineered Materials Handbook, Desk Edition written by ASM International. Handbook Committee and published by ASM International. This book was released on 1995-11-01 with total page 1313 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive reference on the properties, selection, processing, and applications of the most widely used nonmetallic engineering materials. Section 1, General Information and Data, contains information applicable both to polymers and to ceramics and glasses. It includes an illustrated glossary, a collection of engineering tables and data, and a guide to materials selection. Sections 2 through 7 focus on polymeric materials--plastics, elastomers, polymer-matrix composites, adhesives, and sealants--with the information largely updated and expanded from the first three volumes of the Engineered Materials Handbook. Ceramics and glasses are covered in Sections 8 through 12, also with updated and expanded information. Annotation copyright by Book News, Inc., Portland, OR
Author : W. Murray Small
Publisher :
ISBN 13 :
Total Pages : 582 pages
Book Rating : 4.F/5 ( download)
Download or read book Physical Chemistry of Powder Metals Production and Processing written by W. Murray Small and published by . This book was released on 1989 with total page 582 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Arthur H. Lefebvre
Publisher : CRC Press
ISBN 13 : 1498736262
Total Pages : 284 pages
Book Rating : 4.4/5 (987 download)
Download or read book Atomization and Sprays written by Arthur H. Lefebvre and published by CRC Press. This book was released on 2017-03-27 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: The second edition of this long-time bestseller provides a framework for designing and understanding sprays for a wide array of engineering applications. The text contains correlations and design tools that can be easily understood and used in relating the design of atomizers to the resulting spray behavior. Written to be accessible to readers with a modest technical background, the emphasis is on application rather than in-depth theory. Numerous examples are provided to serve as starting points for using the information in the book. Overall, this is a thoroughly updated edition that still retains the practical focus and readability of the original work by Arthur Lefebvre.
