Characterization Of Structure And Dynamics Of Metallic And Organic Glasses Using Electron Microscopy

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Characterization of Structure and Dynamics of Metallic and Organic Glasses Using Electron Microscopy

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Author : Debaditya Chatterjee
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (139 download)

Book Synopsis Characterization of Structure and Dynamics of Metallic and Organic Glasses Using Electron Microscopy by : Debaditya Chatterjee

Download or read book Characterization of Structure and Dynamics of Metallic and Organic Glasses Using Electron Microscopy written by Debaditya Chatterjee and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Glassy states are commonly observed across metallic, organic, and ceramic materials. They exhibit unique mechanical, thermal, and electronic properties. Metallic glasses are stronger than regular metals while being as pliable as plastics, but their wide-spread technological adoption is hindered by our poor understanding of their atomic ordering. Organic glasses have applications ranging from electronics to pharmaceuticals. Glasses lack long-range order, and their properties are mediated by nano-scale ordering. Experimental characterization of glassy structures is incredibly challenging due to the awesome complexity of their nanostructures and a lack of characterization techniques that can probe the local ordering and structural relaxation processes with nanometer-scale spatial resolution. Characterization techniques based on transmission electron microscopy (TEM) probe the structure and dynamics of such systems with nanometer-scale spatial resolution. Structural studies on metallic and organic glasses using 4-dimensional scanning transmission electron microscopy (4D STEM) reveal varying length scales of ordering in these systems and their impact on physical properties, at unprecedented spatial resolution. Electron correlation microscopy (ECM) analysis on time-resolved in situ thermal annealed TEM data lets us study glassy dynamics and reveals spatially heterogeneous dynamics in the bulk and at the surface of metallic glass nanowires. The techniques developed, and the mechanisms of structural ordering and relaxation dynamics revealed in these investigations, have implications on the synthesis, processing, and characterization of glassy systems with controlled thermal, electronic and mechanical properties, including growth of ultrastable metallic glass phases and molecular glasses with tunable structural anisotropy for organic electronics applications, fabrication of glassy nanostructures by superplastic forming, and control of surface crystallization.

Characterization Techniques of Glasses and Ceramics

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Author : Jesus Ma. Rincon
Publisher : Springer Science & Business Media
ISBN 13 : 3662038714
Total Pages : 247 pages
Book Rating : 4.6/5 (62 download)

Book Synopsis Characterization Techniques of Glasses and Ceramics by : Jesus Ma. Rincon

Download or read book Characterization Techniques of Glasses and Ceramics written by Jesus Ma. Rincon and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 247 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph stems from lectures given during the summer course at the University of La Laguna. It includes the main characterization techniques useful nowadays for ceramics, glasses and glass-ceramics, reviews the new microscopes for characterizing materials, and gives an overview of inorganic materials such as zeolites.

Microstructural and Electronic Characteristics of Metallic Spin Glasses

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Author : A. J. Janicki
Publisher :
ISBN 13 :
Total Pages : 20 pages
Book Rating : 4.:/5 (227 download)

Book Synopsis Microstructural and Electronic Characteristics of Metallic Spin Glasses by : A. J. Janicki

Download or read book Microstructural and Electronic Characteristics of Metallic Spin Glasses written by A. J. Janicki and published by . This book was released on 1984 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the report, the structural relaxation process of Fe10Ni65B15Si10 amorphous spin glass is described. The ribbon samples were prepared by melt spinning and heat treated using two different annealing processes AP1 and AP2. The techniques employed to investigate structural changes in the three alloy states (AQ (as-quenched), AP1 and AP2 were as follows: transmission electron microscopy, scanning electron microscopy with X-ray analysis, differential scanning calorimetry and density determination. Differences were detected in the amorphous structures for two states of relaxation in the alloy. The formation of clusters is proposed for one alloy state and the influence of clustering on the early stages of crystallization is discussed. Originator furnished keywords include: Spin glasses, metallic glasses, magnetic clustering, Fe-Ni-B-Si, and electron microscopy.

Metallic Glasses and Their Composites

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Author : D.V. Louzguine
Publisher : Materials Research Forum LLC
ISBN 13 : 1945291435
Total Pages : 336 pages
Book Rating : 4.9/5 (452 download)

Book Synopsis Metallic Glasses and Their Composites by : D.V. Louzguine

Download or read book Metallic Glasses and Their Composites written by D.V. Louzguine and published by Materials Research Forum LLC. This book was released on 2018-01-02 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: The formation of metallic glasses and dual-phase composite/hybrid materials is reviewed, as well as the glass transition process and the resulting structural phenomena. These materials exhibit high strength, extreme hardness, good wear resistance and large elastic deformation. Due to their excellent structural, functional, magnetic, chemical and biological properties metallic glasses are suitable for a great many applications, including in such areas as microelectromechanical devices, pressure sensors, orthopaedic screws and precision surgical instruments. Metallic Glasses, Metallic Glass Composites, Crystal/Glass Transition, Nano-Crystallization, Phase Separations, Supercooled Liquids, Glassy Nanocomposites, Nanoscale Quasicrystals, Mechanical Properties, Nanoscale Wear Resistance, Bauschinger Effect, Cryogenic Temperature, Porous Glasses, Nanocomposite Alloys, Soft Magnetic Alloys, Hard Magnetic Alloys, Magnetocaloric Effect, Corrosion Resistant Alloys, Surface Oxides, Catalysts

Structural Analysis of Metallic Glasses with Computational Homology

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Author : Akihiko Hirata
Publisher : Springer
ISBN 13 : 4431560564
Total Pages : 79 pages
Book Rating : 4.4/5 (315 download)

Book Synopsis Structural Analysis of Metallic Glasses with Computational Homology by : Akihiko Hirata

Download or read book Structural Analysis of Metallic Glasses with Computational Homology written by Akihiko Hirata and published by Springer. This book was released on 2016-04-05 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces the application of computational homology for structural analysis of metallic glasses. Metallic glasses, relatively new materials in the field of metals, are the next-generation structural and functional materials owing to their excellent properties. To understand their properties and to develop novel metallic glass materials, it is necessary to uncover their atomic structures which have no periodicity, unlike crystals. Although many experimental and simulation studies have been performed to reveal the structures, it is extremely difficult to perceive a relationship between structures and properties without an appropriate point of view, or language. The purpose here is to show how a new approach using computational homology gives a useful insight into the interpretation of atomic structures. It is noted that computational homology has rapidly developed and is now widely applied for various data analyses. The book begins with a brief basic survey of metallic glasses and computational homology, then goes on to the detailed procedures and interpretation of computational homology analysis for metallic glasses. Understandable and readable information for both materials scientists and mathematicians is also provided.

Structural Aspects of Deformation in Bulk Metallic Glasses

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Author : Yang Tong
Publisher :
ISBN 13 :
Total Pages : 119 pages
Book Rating : 4.:/5 (991 download)

Book Synopsis Structural Aspects of Deformation in Bulk Metallic Glasses by : Yang Tong

Download or read book Structural Aspects of Deformation in Bulk Metallic Glasses written by Yang Tong and published by . This book was released on 2015 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metallic glasses have liquid-like structure without well-defined topological defects like dislocations in metals and alloys. The unique disordered structure of metallic glasses leads to unique mechanical properties, such as inhomogeneous deformation at low temperature and homogeneous deformation at high temperature, and brittle behavior induced by annealing. This dissertation address three critical issues related to the mechanical behavior of metallic glasses: 1. Identification of deformation defects in metallic glasses. We have conducted high energy X-ray diffraction experiment -- using anisotropic pair distribution function -- to characterize the size and density of defects in metallic glasses activated by external stresses. Our results based on the characterization method reveal the microscopic origin of ductility in some metallic glasses. 2. Identification of two local stress relaxation modes that control macroscopic mechanical properties in metallic glasses. Using the defect characterization method we developed, we revealed two different local stress relaxation modes in defect regions, which are responsible for inhomogeneous and homogeneous deformation respectively. 3. We developed structural rejuvenation method to improve and recover the compressive plasticity. The microscopic mechanism of structural rejuvenation was unveiled by structural study and molecular dynamics simulation.

Structural Characterization of Vapor-deposited Organic Glasses

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Author : Ankit Gujral
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (12 download)

Book Synopsis Structural Characterization of Vapor-deposited Organic Glasses by : Ankit Gujral

Download or read book Structural Characterization of Vapor-deposited Organic Glasses written by Ankit Gujral and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Physical vapor deposition, a common route of thin film fabrication for organic electronic devices, has recently been shown to produce organic glassy films with enhanced kinetic stability and anisotropic structure. Anisotropic structures are of interest in the organic electronics community as it has been shown that certain structures lead to enhanced device performance, such as higher carrier mobility and better light outcoupling. A mechanism proposed to explain the origin of the stability and anisotropy of vapor-deposited glasses relies on two parameters: 1) enhanced molecular mobility at the free surface (vacuum interface) of a glass, and 2) anisotropic molecular packing at the free surface of the supercooled liquid of the glass-forming system. By vapor-depositing onto a substrate maintained at Tsubstrate

Characterization of the Structure, Stability, Mechanical and Electrochemical Properties of Metallic Glasses

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Author : María Jazmín Duarte Correa
Publisher :
ISBN 13 :
Total Pages : 163 pages
Book Rating : 4.:/5 (112 download)

Book Synopsis Characterization of the Structure, Stability, Mechanical and Electrochemical Properties of Metallic Glasses by : María Jazmín Duarte Correa

Download or read book Characterization of the Structure, Stability, Mechanical and Electrochemical Properties of Metallic Glasses written by María Jazmín Duarte Correa and published by . This book was released on 2013 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metallic glasses are often referred as glassy or amorphous alloys. They lack long-range order and microstructural defects that are characteristics in crystals, such as grain and phase boundaries and dislocations. These new materials have demonstrated very interesting structural and mechanical properties derived from their homogeneity in composition and the absence of grain boundaries. Structural, mechanical or chemical properties, among others, may be even superior to those observed in conventional metallic alloys, and therefore attracted great scientific and technological interest. In this thesis project three different families of metallic glasses were selected to achieve a better understanding of amorphous alloys. First, a Ce-based alloy has been used to analyze a polyamorphic transition upon application of pressure to a more densely packed structure. X-ray diffraction and inelastic x-ray scattering data show a polyamorphic transition in the 2-10 GPa range, and this transition presents a hysteresis cycle between both compression and decompression data. The effect of this transition on mechanical properties is then evaluated. Second, a family of Fe-based metallic glasses, or amorphous steels, was selected to study their mechanical and electrochemical properties as a function of the structure and composition. The composition of the base alloy was first modified by addition of Yttrium in different concentrations as microalloying element and the structure was changed by thermal annealing, forming intermediate crystal/amorphous composites, up to a complete crystallization state. Finally, an entirely new alloy for biocompatible purposes has been designed, synthesized, and characterized. The basic structural characterization of this new Zr-Ti based amorphous alloy shows that is possible to produce the amorphous state in an alloy that does not contain toxic or unhealthy elements.

Microstructure-Property Optimization in Metallic Glasses

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Author : Baran Sarac
Publisher : Springer
ISBN 13 : 3319130331
Total Pages : 100 pages
Book Rating : 4.3/5 (191 download)

Book Synopsis Microstructure-Property Optimization in Metallic Glasses by : Baran Sarac

Download or read book Microstructure-Property Optimization in Metallic Glasses written by Baran Sarac and published by Springer. This book was released on 2015-03-12 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis consists of an in-depth study of investigating microstructure-property relationships in bulk metallic glasses using a novel quantitative approach by which influence of the second phase features on mechanical properties can be independently and systematically analyzed. The author evaluates and optimizes the elastic and plastic deformation, as well as the overall toughness of cellular honeycombs under in-plane compression and porous heterostructures under uniaxial tension. The study reveals three major deformation zones in cellular metallic glass structures, where deformation changes from collective buckling showing non-linear elasticity to localized failure exhibiting a brittle-like deformation, and finally to global sudden failure with negligible plasticity as the length to thickness ratio of the ligaments increases. The author found that spacing and size of the pores, the pore configuration within the matrix, and the overall width of the sample determines the extent of deformation, where the optimized values are attained for pore diameter to spacing ratio of one with AB type pore stacking.

Metallic Glasses

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Author : Behrooz Movahedi
Publisher : BoD – Books on Demand
ISBN 13 : 9535125117
Total Pages : 180 pages
Book Rating : 4.5/5 (351 download)

Book Synopsis Metallic Glasses by : Behrooz Movahedi

Download or read book Metallic Glasses written by Behrooz Movahedi and published by BoD – Books on Demand. This book was released on 2016-08-17 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metallic glasses and amorphous materials have attracted much more attention in the last two decades. A noncrystalline solid produced by continuous cooling from the liquid state is known as a glass. From the other point of view, a noncrystalline material, obtained by any other process, for example, vapor deposition or solid-state processing methods such as mechanical alloying, but not directly from the liquid state, is referred to as an amorphous material. At this moment, bulk metallic glasses (BMG) are appearing as a new class of metallic materials with unique physical and mechanical properties for structural and functional usage. Extreme values of strength, fracture toughness, magnetic properties, corrosion resistance, and other properties have been registered in BMG materials.

Scanning Transmission Electron Microscopy

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Author : Stephen J. Pennycook
Publisher : Springer Science & Business Media
ISBN 13 : 1441972005
Total Pages : 764 pages
Book Rating : 4.4/5 (419 download)

Book Synopsis Scanning Transmission Electron Microscopy by : Stephen J. Pennycook

Download or read book Scanning Transmission Electron Microscopy written by Stephen J. Pennycook and published by Springer Science & Business Media. This book was released on 2011-03-24 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scanning transmission electron microscopy has become a mainstream technique for imaging and analysis at atomic resolution and sensitivity, and the authors of this book are widely credited with bringing the field to its present popularity. Scanning Transmission Electron Microscopy(STEM): Imaging and Analysis will provide a comprehensive explanation of the theory and practice of STEM from introductory to advanced levels, covering the instrument, image formation and scattering theory, and definition and measurement of resolution for both imaging and analysis. The authors will present examples of the use of combined imaging and spectroscopy for solving materials problems in a variety of fields, including condensed matter physics, materials science, catalysis, biology, and nanoscience. Therefore this will be a comprehensive reference for those working in applied fields wishing to use the technique, for graduate students learning microscopy for the first time, and for specialists in other fields of microscopy.

Bulk Metallic Glasses

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Author : C. Suryanarayana
Publisher : CRC Press
ISBN 13 : 9781420085969
Total Pages : 0 pages
Book Rating : 4.0/5 (859 download)

Book Synopsis Bulk Metallic Glasses by : C. Suryanarayana

Download or read book Bulk Metallic Glasses written by C. Suryanarayana and published by CRC Press. This book was released on 2010-08-24 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In spite of the large amount of research activity in this subfield of materials science and engineering, there is no single book available that provides background information, methods of synthesis, characterization procedures, properties, and potential and existing applications.of bulk metallic glasses. Written in an easy-to-understand style by pioneering researchers in this field, Bulk Metallic Glasses is one of the first books to coherently discuss the synthesis, processing, properties, and applications of these unique materials. The book explores the differences between nanocrystalline, glassy, and amorphous solids as well as the thermodynamics and kinetics and various processing methods of glass formation. It critically compares the different criteria for glass formation, describes the advantages and limitations of experimental methods for synthesizing bulk metallic glasses in assorted sizes and shapes, and examines the kinetics of crystallization/devitrification and the mechanisms of transformations. It also covers the density, diffusivity, thermal expansion, electrical resistivity, specific heat, viscosity, corrosion resistance, mechanical behavior, and magnetic properties of bulk metallic glasses. After presenting a wide array of applications, the book concludes with a discussion on the future of these materials. The adoption of bulk metallic glasses into existing systems is besieged by many obstacles but due to their interesting combination of properties, future applications may be unlimited. A one-stop resource on all aspects of bulk metallic glasses, this book demonstrates the immense potential of these novel materials. It clearly elucidates the background, detailed methods of synthesis and characterization, structure, and properties of bulk metallic glasses.

Fundamentals, Properties, and Applications of Polymer Nanocomposites

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Author : Joseph H. Koo
Publisher : Cambridge University Press
ISBN 13 : 1316094413
Total Pages : 719 pages
Book Rating : 4.3/5 (16 download)

Book Synopsis Fundamentals, Properties, and Applications of Polymer Nanocomposites by : Joseph H. Koo

Download or read book Fundamentals, Properties, and Applications of Polymer Nanocomposites written by Joseph H. Koo and published by Cambridge University Press. This book was released on 2016-10-31 with total page 719 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is focused primarily on polymer nanocomposites, based on the author's research experience as well as open literature. The environmental health and safety aspects of nanomaterials and polymer nanocomposites, risk assessment and safety standards, and fire toxicity of polymer nanocomposites, are studied. In the final chapter, a brief overview of opportunities, trends, and challenges of polymer nanocomposites are included. Throughout the book, the theme is developed that polymer nanocomposites are a whole family of polymeric materials whose properties are capable of being tailored to meet specific applications. This volume serves as a general introduction to students and researchers just entering the field and to scholars from other subfields seeking information.

Scientific and Technical Aerospace Reports

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Author :
Publisher :
ISBN 13 :
Total Pages : 704 pages
Book Rating : 4.:/5 (31 download)

Book Synopsis Scientific and Technical Aerospace Reports by :

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Structure-property Correlations in Metallic Glass and Amorphous Carbon Films

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Author : Sachin Vijay Muley
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (139 download)

Book Synopsis Structure-property Correlations in Metallic Glass and Amorphous Carbon Films by : Sachin Vijay Muley

Download or read book Structure-property Correlations in Metallic Glass and Amorphous Carbon Films written by Sachin Vijay Muley and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Structure-property correlations are invaluable expertise to advance materials' technologies since well-designed materials offer a serious competitive edge, and robust failure analyses complement process improvements. This thesis invokes structure-property interrelationships with a focus on improving materials' performance for industrial adoption of various technologically important systems. In chapter 4, we studied the structure and properties of Zr-Cu-Al thin films synthesized by magnetron sputtering as a function of deposition parameters. In chapter 5, we investigated the structure, mechanical properties and scratch behavior in single-layered and multilayered amorphous carbon thin films made by NCD Technologies' proprietary vapor deposition method. In chapter 6, we presented a case study to identify the failure mode of upper copper weld wheels in an industrial production line which had a much shorter lifetime than the lower electrode. Vapor deposition forms metallic glasses with novel thermodynamic and kinetic stabilities unachievable through conventional routes. In chapter 4, kinetic stability in Zr-Cu-Al metallic glass thin films, indicated by their glass transition temperature, was widely varied by changing deposition rate at constant temperature. The most kinetically stable film's reduced modulus was 22[percent] higher than a glass of the same composition quenched from the liquid by melt spinning, suggesting increased density and improved thermodynamic stability. Fluctuation electron microscopy and angular correlations studies performed using coherent electron nanodiffraction attributed enhanced stability in glasses to increased nanoscale structural order at the medium range length scale, especially of icosahedral nature. Our results indicated that increased nanoscale icosahedral order contributed to resistance of glass to both glass transition and mechanical deformation. In chapter 5, the elastic modulus and hardness in single-layered amorphous carbon films were improved up to as much as 35 and 30 [percent] respectively by varying the applied bias voltage and pulse width. Film structure measured by Raman spectroscopy showed that the maxima in mechanical properties due to bias voltage was correlated to highest sp3 fraction, highest sp2 disorder and overall lowest disorder. Based on single-layer results, multilayers were developed. Nanoindentation and scratch-testing revealed that while multilayering preserved high hardness and improved friction behavior irrespective of the recipe, the scratch volume was strongly correlated with hardness.

Structural Characterization of Materials by Use of Electron Microscopy and Spectroscopy

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Author : V. A. Phillips
Publisher :
ISBN 13 :
Total Pages : 53 pages
Book Rating : 4.:/5 (227 download)

Book Synopsis Structural Characterization of Materials by Use of Electron Microscopy and Spectroscopy by : V. A. Phillips

Download or read book Structural Characterization of Materials by Use of Electron Microscopy and Spectroscopy written by V. A. Phillips and published by . This book was released on 1971 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present status of the techniques of conventional electron microscopy, energy analyzing and energy selecting microscopy, direct resolution microscopy, high-voltage microscopy, and scanning electron microscopy is critically discussed and future trends are indicated. The basic principles of each technique and types of application are reviewed.

Metals Abstracts

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Author :
Publisher :
ISBN 13 :
Total Pages : 1042 pages
Book Rating : 4.E/5 ( download)

Book Synopsis Metals Abstracts by :

Download or read book Metals Abstracts written by and published by . This book was released on 1998 with total page 1042 pages. Available in PDF, EPUB and Kindle. Book excerpt: