Last edited by Nizuru
Friday, July 31, 2020 | History

3 edition of Grain Boundary Diffusion and Properties of Nanostructured Materials found in the catalog.

Grain Boundary Diffusion and Properties of Nanostructured Materials

by Yu R Kolobov

  • 159 Want to read
  • 10 Currently reading

Published by Cambridge International Science Publishing .
Written in English

    Subjects:
  • Chemistry,
  • Science,
  • Technology & Industrial Arts,
  • Science/Mathematics,
  • Material Science,
  • Nanostructures,
  • Science-Nanostructures,
  • Science/Nanostructures,
  • Technology / Material Science,
  • Physics

  • The Physical Object
    FormatHardcover
    Number of Pages250
    ID Numbers
    Open LibraryOL8772560M
    ISBN 101904602177
    ISBN 109781904602170

    Abstract. Using an asymptotic method of solving diffusion equations and a Laplace transform, the theory of grain-boundary diffusion is extended to the case of a coefficient of bulk diffusion strongly changing near the structural boundaries of grains under the conditions of annealing corresponding to regime C in usual polycrystals. An analysis of the layer activity measured in the diffusion Cited by: 3. Part 5 is devoted to theoretical modeling of grain boundary diffusion in bulk nanostructured materials with special attention paid to the role of non-equilib-rium grain boundaries in the diffusion enhancement. Part 6 has a deal with the influence of GB phase transitions like wetting, prewetting, premelting on the properties of materials.

    Grain boundary and bulk diffusion are two main governing processes of creep deformation in materials. Since the diffusion activation energy for nanostructured materials is .   Stabilizing nanostructures in metals using grain and twin boundary architectures K. Lu 1, 2 Nature Reviews Materials volume 1, Article number: () Cite this articleCited by:

    A grain boundary is the interface between two grains, or crystallites, in a polycrystalline boundaries are 2D defects in the crystal structure, and tend to decrease the electrical and thermal conductivity of the material. Most grain boundaries are preferred sites for the onset of corrosion and for the precipitation of new phases from the solid. Superplasticity and grain boundaries in ultrafine-grained materials discusses a number of problems associated with grain boundaries in metallic polycrystalline materials. The role of grain boundaries in processes such as grain boundary diffusion, relaxation and grain .


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Grain Boundary Diffusion and Properties of Nanostructured Materials by Yu R Kolobov Download PDF EPUB FB2

: Grain Boundary Diffusion and Properties of Nanostructured Materials (): Kolobov, Yu R: BooksCited by: Grain Boundary Diffusion and Properties of Nanostructured Materials (illustrated Edition) by Yu R.

Kolobov, R. Valiev, M. Ivanov Hardcover, Pages, Published ISBN / ISBN / Need it Fast. 2 day shipping optionsBook Edition: Illustrated Edition. Get this from a library. Grain boundary diffusion and properties of nanostructured materials. [Yu R Kolobov;]. Abstract. Nanostructured (NS) materials (grain size d ≤ nm) are currently being intensively investigated.

This special attention is due to the distinct physical, mechanical and other properties compared to when they are coarse-grained (CG) [1].Cited by: 9. Nanostructured materials are single-phase or multiphase polycrystalline solids with a typical average grain size of a few nanometers, typically less than nm.

Such materials exhibit properties that are substantially different from and are often superior to those of conventional coarse-grained materials, due to their unique microstructure.

Nanostructured materials exhibit unique mechanical and physical properties compared with their coarse-grained counterparts, therefore these materials are currently a major focus in materials science.

The production methods of nanomaterials affect the lattice defect structure (vacancies, dislocations, disclinations, stacking faults. Grain boundary (GB) phase transitions can change drastically the properties of nanograined polycrystals, leading to enhanced plasticity or brittleness, increasing diffusion permeability.

They influence also liquid-phase and activated sintering, soldering, processing of semi-solid by:   Using asymptotic solution methods of differential equations, the grain-boundary diffusion at transition (between regimes C and B) stages of annealing has been described for nano- and submicrocrystalline materials characterized by nonequilibrium grain boundaries and, thus, by a strong coordinate dependence of the diffusion coefficient near them.

As a Cited by: 1. COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle.

As this route leads to no residual porosity, it has been recommended for bulk production of nanocrystalline metallic materials. But the grain boundaries in this type of materials are of higher energy, ‘non-equilibrium’ type and even in a material of fixed grain size different properties could be obtained.

This calls for property control through grain boundary engineering Cited by: Grain boundary (GB) diffusion and segregation in nanostructured materials is analysed taking into account the low thermal stability and the large portion of atoms presented in short circuits.

To the theory of grain-boundary diffusion in nanostructured materials Article in The Physics of Metals and Metallography (4) April with 12 Reads How we measure 'reads'. The mechanical properties of nanocrystalline materials are reviewed, with emphasis on their con-stitutive response and on the fundamental physical mechanisms.

In a brief introduction, the most important synthesis methods are presented. A number of aspects of mechanical behavior are dis-cussed. Nanostructured Materials (NsM) are materials with a microstructure the characteristic length scale of which is on the order of a few (typically 1–10) nanometers.

NsM may be in or far away from thermodynamic equilibrium. NsM synthesized by supramolecular chemistry are examples of NsM in thermodynamic by: Unveiling the Outstanding Oxygen Mass Transport Properties of Mn-Rich Perovskites in Grain Boundary-Dominated La Sr (Mn 1–x Co x) O 3±δ Nanostructures Aruppukottai M.

Saranya Department of Advanced Materials for Energy Applications, Catalonia Institute for Energy Research (IREC), Jardins de les Dones de Negre 1, Sant Cited by: 4.

It is known that the kinetics of diffusion processes in nanomaterials (NMs) essentially differs compared to coarse-grained polycrystals1 2 3, mainly due to a branched network of grain boundaries. The experimental and theoretical investigations of grain boundary diffusion processes have been performed using metals and alloys in nanostructured state produced by severe plastic deformation and the respective polycrystalline counterparts.

The main features of diffusioncontrolled mechanisms of plastic deformation observed by the creep of nanostructured Cited by: 7. However, modern engineering frequently requires materials with a set of multifunctional, often conflicting properties: Enhanced mechanical properties need to be combined with improved physical (electrical, magnetic, etc.) and/or chemical (corrosion resistance, biocompatibility) properties.

So disparate materials properties need to be engineered. The disclination concept is widely used in materials science to describe the structure and properties of grain boundaries, their triple junctions, the plastic deformation and fracture mechanisms, etc [3–8].Cited by: 7.

Diffusion at the Segregated Grain Boundaries - Competitive Segregation or Diffusional Competition. p Diffusion and Properties of Bulk Nanostructured Metals and Alloys Processed by Severe Plastic DeformationCited by: 3. Superplasticity and Grain Boundaries in Ultrafine-Grained Materials, Second Edition provides cutting-edge modeling solutions surrounding the role of grain boundaries in processes such as grain boundary diffusion, relaxation and grain growth.

In addition, the book's authors explore the formation and evolution of the microstructure, texture and ensembles of grain boundaries in materials Book Edition: 2.In sintering by grain boundary diffusion, mass is removed from the interparticle grain boundary and deposited on the neck surface.

Pores act to emit vacancies. Then the interparticle grain boundaries, and internal grain boundaries .ent transport mechanisms (deformation, diffusion, etc.), that is, grain boundary sliding, which in turn leads to differences in the properties.

In such a manner, this opens a new way for advancing the properties of UFG materials by appropriately tuning their grain boundary structures.