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Electronic Structure And Stability Of Metallic Glasses
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Book Synopsis Electronic Structure and Stability of Metallic Glasses by : Jan Tauc
Download or read book Electronic Structure and Stability of Metallic Glasses written by Jan Tauc and published by . This book was released on 1980 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: The work was concentrated on deepening our understanding of the properties of electrons in metallic glasses and amorphous thin films and their role in determining the atomic arrangement in these materials. It includes a photoemission study of Nb-Ni glasses, an analysis of an electronic contribution to the free energy of a binary liquid that determines the atomic correlations, EXAFS studies of the structure of Pb-Ge quenched glasses and amorphous thin films, optical studies of amorphous Au-Si system, and a study of the magneto-optic effect in Fe80B20 metallic glass. (Author).
Book Synopsis Relationships Between Electronic Structure and Stability of Metallic Glasses by : F. Abeles
Download or read book Relationships Between Electronic Structure and Stability of Metallic Glasses written by F. Abeles and published by . This book was released on 1984 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: Amorphous Au-Ge and Ag-Ge alloy films were prepared by co-evaporation on low-temperature (15-20K) substrates under ultra-high vacuum for Ge concentrations between 20 and 40 at.%. Changes in short-range order have been observed by room-temperature electron diffraction experiments for Ge concentrations larger than 30 at.%. The d.c. electrical resistivity and the optical properties of the as-deposited amorphous metallic alloys are examined in detail as a function of composition. The Drude model with a constant relaxation time is found to reproduce the low-energy optical data satisfactorily.
Book Synopsis Electronic Structure, Stability and Electron Transport Properties of Some Metallic Glasses by : Ramesh Chandra Budhani
Download or read book Electronic Structure, Stability and Electron Transport Properties of Some Metallic Glasses written by Ramesh Chandra Budhani and published by . This book was released on 1982 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Christ Church, Shelburne, Nova Scotia by :
Download or read book Christ Church, Shelburne, Nova Scotia written by and published by . This book was released on 1940* with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stability of Bulk Metallic Glass Structure by : D. B. Williams
Download or read book Stability of Bulk Metallic Glass Structure written by D. B. Williams and published by . This book was released on 2003 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fundamental origins of the stability of the (Pd-Ni){sub 80}P{sub 20} bulk metallic glasses (BMGs), a prototype for a whole class of BMG formers, were explored. While much of the properties of their BMGs have been characterized, their glass-stability have not been explained in terms of the atomic and electronic structure. The local structure around all three constituent atoms was obtained, in a complementary way, using extended X-ray absorption fine structure (EXAFS), to probe the nearest neighbor environment of the metals, and extended energy loss fine structure (EXELFS), to investigate the environment around P. The occupied electronic structure was investigated using X-ray photoelectron spectroscopy (XPS). The (Pd-Ni){sub 80}P{sub 20} BMGs receive their stability from cumulative, and interrelated, effects of both atomic and electronic origin. The stability of the (Pd-Ni){sub 80}P{sub 20} BMGs can be explained in terms of the stability of Pd{sub 60}Ni{sub 20}P{sub 20} and Pd{sub 30}Ni{sub 50}P{sub 20}, glasses at the end of BMG formation. The atomic structure in these alloys is very similar to those of the binary phosphide crystals near x=0 and x=80, which are trigonal prisms of Pd or Ni atoms surrounding P atoms. Such structures are known to exist in dense, randomly-packed systems. The structure of the best glass former in this series, Pd{sub 40}Ni{sub 40}P{sub 20} is further described by a weighted average of those of Pd{sub 30}Ni{sub 50}P{sub 20} and Pd{sub 60}Ni{sub 20}P{sub 20}. Bonding states present only in the ternary alloys were found and point to a further stabilization of the system through a negative heat of mixing between Pd and Ni atoms. The Nagel and Tauc criterion, correlating a decrease in the density of states at the Fermi level with an increase in the glass stability, was consistent with greater stability of the Pd{sub x}Ni{sub (80-x)}P{sub 20} glasses with respect to the binary alloys of P.A valence electron concentration of 1.8 e/a, which ensures the superpositioning of the first peak in the structure factor with twice the Fermi momentum, was used to calculate the interatomic potential of these alloys. The importance of Pd to the stability of the alloys is evidenced by the fact that replacing Ni with Pd places the nearest neighbor distances at more attractive positions in this potential.
Book Synopsis Electrons in Disordered Metals and at Metallic Surfaces by : P. Phariseau
Download or read book Electrons in Disordered Metals and at Metallic Surfaces written by P. Phariseau and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 575 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present here the transcripts of lectures and talks which were delivered at the NATO ADVANCED STUDY INSTITUTE "Electrons in Disordered Hetals and at ~~etallic Surfaces" held at the State University of Ghent, Belgium between August 28 and September 9, 1978. The aim of these lectures was to highlight some of the current progress in our understanding of the degenerate electron 'liquid' in an external field which is neither uniform nor periodic. This theme brought together such topics as the electronic structure at metallic surfaces and in random metallic alloys, liquid metals and metallic glasses. As is the case in connection with infinite order ed crystals, the central issues to be discussed were the nature of the electronic spectra, the stability of the various phases and the occurrence of such phenomena as magnetism and supercon ductivity. In the theoretical lectures the emphasis was on detailed rea listic calculations based, more or less, on the density functional approach to the problem of the inhomogeneous electron liquid. How ever, where such calculations were not available, as in the case of magnetism in random alloys and that of metallic glasses, sim pler phenomenological models were used. The theoretical discussions were balanced by reviews of the most promising experimental techniques. Here the stress was on results and their relevance to the fundamental theory. lforeover, the attention had centered on those experiments which probe the electronic structure in the greatest detail.
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 2017-11-22 with total page 543 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reflecting the fast pace of research in the field, the Second Edition of Bulk Metallic Glasses has been thoroughly updated and remains essential reading on the subject. It incorporates major advances in glass forming ability, corrosion behavior, and mechanical properties. Several of the newly proposed criteria to predict the glass-forming ability of alloys have been discussed. All other areas covered in this book have been updated, with special emphasis on topics where significant advances have occurred. These include processing of hierarchical surface structures and synthesis of nanophase composites using the chemical behavior of bulk metallic glasses and the development of novel bulk metallic glasses with high-strength and high-ductility and superelastic behavior. New topics such as high-entropy bulk metallic glasses, nanoporous alloys, novel nanocrystalline alloys, and soft magnetic glassy alloys with high saturation magnetization have also been discussed. Novel applications, such as metallic glassy screw bolts, surface coatings, hyperthermia glasses, ultra-thin mirrors and pressure sensors, mobile phone casing, and degradable biomedical materials, are described. Authored by the world’s foremost experts on bulk metallic glasses, this new edition endures as an indispensable reference and continues to be a one-stop resource on all aspects of bulk metallic glasses.
Book Synopsis The Structural Origins of the Stability of Pd-Ni-P Bulk Metallic Glasses by : Faisal M. Alamgir
Download or read book The Structural Origins of the Stability of Pd-Ni-P Bulk Metallic Glasses written by Faisal M. Alamgir and published by . This book was released on 2002 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fundamental origins of the stability of the (Pd-Ni)80P 20 bulk metallic glasses (BMGs), a prototype for a whole class of BMG formers, were explored. While much of the properties of their BMGs have been characterized, their glass-stability have not been explained in terms of the atomic and electronic structure. The local structure around all three constituent atoms was obtained, in a complementary way, using extended X-ray absorption fine structure (EXAFS), to probe the nearest neighbor environment of the metals, and extended energy loss fine structure (EXELFS), to investigate the environment around P. The occupied electronic structure was investigated using X-ray photoelectron spectroscopy (XPS). The (Pd-Ni)80P20 BMGs receive their stability from cumulative, and interrelated, effects of both atomic and electronic origin. The stability of the (Pd-Ni)80P20 BMGs can be explained in terms of the stability of Pd60Ni20P 20 and Pd30Ni50P20, glasses at the end of BMG formation, The atomic structure in these alloys is very similar to those of the binary phosphide crystals near x = 0 and x = 80, which are trigonal prisms of Pd or Ni atoms surrounding P atoms. Such structures are known to exist in dense, randomly-packed systems. The structure of the best glass former in this series, Pd40Ni40P20 is further described by a weighted average of those of Pd30Ni 50P20 and Pd60Ni20P20. Bonding states present only in the ternary alloys were found and point to a further stabilization of the system through a negative heat of mixing between Pd and Ni atoms, The Nagel and Tauc criterion, correlating a decrease in the density of states at the Fermi level with an increase in the glass stability, was consistent with greater stability of the PdxNi (80-x)P20 glasses with respect to the binary alloys of P.A valence electron concentration of 1.8 e/a, which ensures the superpositioning of the first peak in the structure factor with twice the Fermi momentum, was used to calculate the interatomic potential of these alloys. The importance of Pd to the stability of the alloys is evidenced by the fact that replacing Ni with Pd places the nearest neighbor distances at more attractive positions in this potential.
Book Synopsis Bulk Metallic Glasses: Volume 554 by : William L. Johnson
Download or read book Bulk Metallic Glasses: Volume 554 written by William L. Johnson and published by . This book was released on 1999-11-02 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bulk metallic glasses (bulk amorphous alloys) constitute an exciting class of metallic materials for structural and functional use. These glass-forming metallic alloys vitrify at relatively low cooling rates (from the molten state), compared with conventional rapidly quenched metallic glasses. Owing to their exceptional resistance to crystallization, these 'easy' glass-forming alloys can be cast in bulk form with dimensions of millimeters or centimeters. The development of such alloys has opened the possibility for studies of the kinetic and thermodynamic properties of undercooled liquids. It also looks at applications for glassy metals based on the ability to fabricate three-dimensional shapes and components. It has become apparent that the development of bulk glass-forming alloys has ushered in a second generation of development in the field of amorphous metals. This book discusses the progress being made. Topics include: atomic and electronic structure; general topics in bulk metallic glasses; glass-forming ability and thermal stability; thermal stability, transport and magnetic properties and mechanical and other properties.
Download or read book Metallic Glasses written by Dragica Minić and published by BoD – Books on Demand. This book was released on 2020-02-05 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: The term "metallic glasses" is widely used to denote the amorphous alloys obtained by rapid quenching techniques. These materials are characterized by short range atom ordering without translational periodicity of the structure. Kinetic and thermodynamic metastability is one of the main characteristics generally related to metallic glasses, while their thermally induced microstructural transformations could result in deterioration or improvement of the functional properties. Due to their favorable magnetic, electrical, mechanical, and anti-corrosion properties, metallic glasses as new and attractive materials have found application in many areas of modern industries - electronics, construction industry, aerospace industry; as well as chemistry, biomedicine, and surgery.
Book Synopsis Electronic Structure of Metallic Glasses by : K. C. Thompson-Russell
Download or read book Electronic Structure of Metallic Glasses written by K. C. Thompson-Russell and published by . This book was released on 1983 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electronic Structure of Metallic Glasses by : K. C. Thompson-Russell
Download or read book Electronic Structure of Metallic Glasses written by K. C. Thompson-Russell and published by . This book was released on 1983 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electronic Structure of Metallic Glasses by : Uichirō Mizutani
Download or read book Electronic Structure of Metallic Glasses written by Uichirō Mizutani and published by . This book was released on 1983 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Materials Science Prog V28/2 F by : Uichiro Mizutani
Download or read book Materials Science Prog V28/2 F written by Uichiro Mizutani and published by . This book was released on 1984-01-01 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Metallic Glasses: Investigation of Electronic Structure and Its Relationship to Physical Properties by : W. A. Hines
Download or read book Metallic Glasses: Investigation of Electronic Structure and Its Relationship to Physical Properties written by W. A. Hines and published by . This book was released on 1984 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes the work which was completed during the first four years of the research program (October 1, 1979 to September 30, 1983). Included are: (1) a NMR and magnetic susceptibility study of several rapidly quenched Ni-Pd-P, Ni-Pt-P and Ni-P metallic glasses. (2) a magnetization study of the RE100-xAlx amorphous alloys (where RE is a rare earth element), (3) a NMR, magnetization and x-ray diffraction study of crystalline Fe3-xNixSi and Metglas 2605 CO (Fe67Co18B14Si1), (4) a NMR and magnetic susceptibility study of the Ca100-xAlx metallic glass system, (5) a magnetization study of some Co-Nb-B and Fe-Nb-B metallic glasses, (6) an EXAFS study of Metaglas 2605 CO and (7) a XANES study of the (Ni0.50Pt0.50)75P25 metallic glass system. In addition, this report described in complete detail the progress during the past year (October 1, 1983 to September 30, 1984) which includes: (1) a spin-echo NMR study of the atomic environment in the Fe100-xBx metallic glass system and (2) a low field magnetization study of the magnetic anisotropy in Metglas 2605 CO ribbons. Finally, this report describes the status of experiments currently in progress which includes: (1) optical properties of the Ni100-xPx metallic glasses and (2) Mossbauer study of the Metglas 2605 CO system. Originator supplied keywords include: Electronic structure, Density of states, Atomic structure; Specific heat.
Book Synopsis Electronic Structure of Metallic Glasses by :
Download or read book Electronic Structure of Metallic Glasses written by and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper is organized in six sections and deals with (1) the glassy transition metal alloys, their d-band structure, the d-band shifts on alloying and their relation to the alloy heat of formation (.delta. H) and the glass forming ability, (2) the glass to crystal phase transition viewed by valence band spectroscopy, (3) band structure calculations, (4) metallic glasses prepared by laser glazing, (5) glassy normal metal alloys, and (6) glassy hydrides.
Book Synopsis Springer Handbook of Glass by : J. David Musgraves
Download or read book Springer Handbook of Glass written by J. David Musgraves and published by Springer Nature. This book was released on 2019-11-08 with total page 1851 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook provides comprehensive treatment of the current state of glass science from the leading experts in the field. Opening with an enlightening contribution on the history of glass, the volume is then divided into eight parts. The first part covers fundamental properties, from the current understanding of the thermodynamics of the amorphous state, kinetics, and linear and nonlinear optical properties through colors, photosensitivity, and chemical durability. The second part provides dedicated chapters on each individual glass type, covering traditional systems like silicates and other oxide systems, as well as novel hybrid amorphous materials and spin glasses. The third part features detailed descriptions of modern characterization techniques for understanding this complex state of matter. The fourth part covers modeling, from first-principles calculations through molecular dynamics simulations, and statistical modeling. The fifth part presents a range of laboratory and industrial glass processing methods. The remaining parts cover a wide and representative range of applications areas from optics and photonics through environment, energy, architecture, and sensing. Written by the leading international experts in the field, the Springer Handbook of Glass represents an invaluable resource for graduate students through academic and industry researchers working in photonics, optoelectronics, materials science, energy, architecture, and more.
