Structure of metallic glasses

Gokularathnam, C. V.

doi:10.1007/bf02387543

Cited by 20 publications

(3 citation statements)

References 65 publications

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“…In order to confirm the applicability of this model t,he radial distribution function, G ( r ) , is related to the structure factor S ( g ) which in turn is related [18, 191 to Variations of the resistivity with temperature at constant volume will be given by the changes in the resistivity structure factor with temperature. The t-matrix plays the role of a weighting function in (2) and is essentially temperature independent. In metglasses, which generally contain transition metals, the dominant contribution to the resistivity conies froin the back scattering region q = 2kF.…”

Section: Theoretical Approachmentioning

confidence: 99%

Structure analysis of the metallic glass Fe40Ni40B20 using the tangent lattice model

Phillips

Gobran

Kamel

1985

phys. stat. sol. (a)

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The electrical resistivity is adopted as a structure sensitive property to trace atomic rearrangments before and after crystallization of the metallic glasses. Hence, using Ziman‐Evan's theory the electrical resistivity for the amorphous phase of metglass is calculated, taking into consideration the radial distribution function for the tangent lattice model. From the calculations a model based on atomic tilting can be adopted and 8 tangent lattice form can be applied to the amorphous state of metglasses such as Fe40Ni40B20.

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Section: Theoretical Approachmentioning

confidence: 99%

Structure analysis of the metallic glass Fe40Ni40B20 using the tangent lattice model

Phillips

Gobran

Kamel

1985

phys. stat. sol. (a)

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“…An early review on the structure of metallic glasses, written from Varanasi, offers a discussion of the various models for the atomic arrangements in amorphous alloys (Gokularathnam 1974). Among these Bernal's (1964) fleant feature of this model is the occurrence of polyhedral holes with atoms at the vertices.…”

Section: Atomic Arrangementsmentioning

confidence: 99%

Production and characterisation of amorphous alloys at varanasi

1980

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Amorphous alloys, more commonly referred to as metallic glasses, represent a striking advance in inorganic materials technology of recent times. While the probable atomic arrangements in noncrystalline alloys have aroused scientific curiosity, their unusual mechanical strength, attractive magnetic properties and remarkable corrosion resistance have excited technological interest. This report describes the progress of research at Varanasi on the following aspects: adaptation, innovation and development of techniques for rapid solidification, study and refinemeat of structural models, calculation of thermodynamic quantities, evaluation of strength and corrosion resistance and studies of glass to crystal transition.

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“…Review articles have been written on investigations of thin films by Dove (46), on amorphous metallic alloys by Gokularathnam (47) and Cargill (48), on glass structure by Wright (49), and on amorphous catalysts by Ratnasamy and Leonard (50).…”

Section: Amorphous Materialsmentioning

confidence: 99%

Structure determination of gaseous and amorphous substances by diffraction methods: Philosophical concepts and their implementation (A Review)

Karle

1977

Proc. Natl. Acad. Sci. U.S.A.

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Structure determination by diffraction methods is reviewed in terms of the philosophical and mathematical aspects of the techniques used to investigate the atomic arrangements in gaseous and amorphous substances. Both theory and experiment must be adapted to each other's limitations. This is accomplished often only after much time and study have been devoted to the problems. Some areas of application are favored by an overdeterminacy in the data, which helps to simplify the mathematical aspects of the analysis. Other areas have relatively few data compared to the number of unknown parameters. In such cases, special analytical procedures that use, for example, chemical and structural information are indispensible. Applications cover a broad range of problems and afford fundamental information to many fields of science. Structure analysis by diffraction methods is concerned with the determination of the geometric arrangements of atoms in materials. At times the resolution is not sufficient to permit the location of atoms. In such cases, the positions of aggregates of atoms are determined. The average thermal motion of the atoms also often can be described. This is achieved by an interpretation of the patterns formed by suitable incident beams that are scattered by the substances of interest. The beams commonly used for such purposes are composed of electrons, x-rays, or neutrons, giving rise to the names of the various diffraction techniques.This article concerns mainly the philosophical aspects of structure determination-i.e., concepts and problems-rather than the numerous applications. The latter can be found in other articles referred to throughout the text.BACKGROUND

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Structure of metallic glasses

Cited by 20 publications

References 65 publications

Structure analysis of the metallic glass Fe40Ni40B20 using the tangent lattice model

Structure analysis of the metallic glass Fe40Ni40B20 using the tangent lattice model

Production and characterisation of amorphous alloys at varanasi

Structure determination of gaseous and amorphous substances by diffraction methods: Philosophical concepts and their implementation (A Review)

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