scholarly journals DYNAMIC AND STATIC WALL FRICTIONS FOR BULK SOLIDS

2021 ◽  
Vol 6 (4) ◽  
pp. 172-175
Author(s):  
Jie Guo ◽  
Peter Robinson ◽  
Corin Holmes
Keyword(s):  
Bulk Solids

Integration of Core-Edge Spectroscopy Methods for the Study of Polymers

1996 ◽  
Vol 54 ◽  
pp. 154-155
Author(s):  
E. G. Rightor
Keyword(s):  
Excited State ◽  
Polymer Blends ◽  
Gas Phase ◽  
Spatial Resolution ◽  
High Spatial Resolution ◽  
Electronic States ◽  
Core Electron ◽  
Bulk Solids ◽  
Development Application

Core edge spectroscopy methods are versatile tools for investigating a wide variety of materials. They can be used to probe the electronic states of materials in bulk solids, on surfaces, or in the gas phase. This family of methods involves promoting an inner shell (core) electron to an excited state and recording either the primary excitation or secondary decay of the excited state. The techniques are complimentary and have different strengths and limitations for studying challenging aspects of materials. The need to identify components in polymers or polymer blends at high spatial resolution has driven development, application, and integration of results from several of these methods.

CORRELATIONS BETWEEN STRUCTURE AND MAGNETISM IN THIN FILMS AND NANOSTRUCTURES

1999 ◽  
Vol 06 (05) ◽  
pp. 753-761 ◽  
Author(s):  
P. LE FÈVRE ◽  
H. MAGNAN ◽  
A. MIDOIR ◽  
D. CHANDESRIS ◽  
H. JAFFRÈS ◽  
...  
Keyword(s):  
Thin Films ◽  
Structural Characterization ◽  
Structural Relaxation ◽  
Easy Axis ◽  
Perpendicular Magnetic Anisotropy ◽  
Magnetic Films ◽  
Bulk Solids ◽  
Thin Magnetic Films ◽  
Distorted Structure ◽  
Crystallographic Structures

The bidimensionnal character of thin magnetic films deposited on single-crystal substrates, together with the occurrence of singular crystallographic structures, often confer on these systems electronic properties that cannot be found in bulk solids. For example, thin Ni layers deposited on Cu(001) present a perpendicular magnetic anisotropy in a very wide thickness range. We will show that this can be explained by a distorted structure of Ni, originating from the strain induced by the epitaxy on the Cu substrate. In this field of 2D magnetism, nanostructures are now investigated. Thin Fe layers on MgO(001) were cut into stripes by the "atomic saw" method: a compression of the substrate induces a dislocation slipping which saws both the substrate and the Fe film in regular and separated ribbons. The observed perpendicular to the stripes magnetization easy axis will be explained by a structural relaxation occurring during the structuration process. In these two studies, a precise structural characterization and simple magnetoelastic models allow one to describe the magnetic behaviors of these systems.

scholarly journals Towards an accurate description of perovskite ferroelectrics: exchange and correlation effects

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Simuck F. Yuk ◽  
Krishna Chaitanya Pitike ◽  
Serge M. Nakhmanson ◽  
Markus Eisenbach ◽  
Ying Wai Li ◽  
...  
Keyword(s):  
Density Functional ◽  
General Purpose ◽  
Correlation Effects ◽  
Lattice Constants ◽  
Bulk Solids ◽  
Wide Range ◽  
Exchange Enhancement ◽  
Experimental Values ◽  
Similar Accuracy ◽  
Ferroelectric Oxides

Abstract Using the van der Waals density functional with C09 exchange (vdW-DF-C09), which has been applied to describing a wide range of dispersion-bound systems, we explore the physical properties of prototypical ABO 3 bulk ferroelectric oxides. Surprisingly, vdW-DF-C09 provides a superior description of experimental values for lattice constants, polarization and bulk moduli, exhibiting similar accuracy to the modified Perdew-Burke-Erzenhoff functional which was designed specifically for bulk solids (PBEsol). The relative performance of vdW-DF-C09 is strongly linked to the form of the exchange enhancement factor which, like PBEsol, tends to behave like the gradient expansion approximation for small reduced gradients. These results suggest the general-purpose nature of the class of vdW-DF functionals, with particular consequences for predicting material functionality across dense and sparse matter regimes.

Multiphase Bulk Solids Flow Systems

1980 ◽  
Vol 102 (2) ◽  
pp. 129-132
Author(s):  
R. B. Emery
Keyword(s):  
Soil Mechanics ◽  
Fluid Pressure ◽  
Pressure Control ◽  
Multiphase System ◽  
Mechanical Loads ◽  
Bulk Solids ◽  
Design Goal ◽  
Flow Systems ◽  
Quantitative Design ◽  
Design Construction

Theory and proof are presented here related to fluid pressure control of bulk solids flowability. They are directed toward a quantitative design goal for fluid-solids flow systems. An effort is made to relate multiphase system concept to existing soil mechanics, strength of material and bulk solids flow theory. Gas or liquid interstitial loads often add cumulative effects to the mechanical loads normally considered in bulk solids flow systems. Summation of the mechanical, gas and liquid loads form the basis for multiphase system design. Useful savings in design, construction and maintenance are expected from application of multiphase theory. Quantitative design can, in some cases, provide flow, no-flow, or a controlled combination of flow and no-flow.

Laser-microprobe mass-analysis of surface layers and bulk solids

Vacuum ◽  
1984 ◽  
Vol 34 (10-11) ◽  
pp. 903-909 ◽  
Author(s):  
MJ Southon ◽  
MC Witt ◽  
A Harris ◽  
ER Wallach ◽  
J Myatt
Keyword(s):  
Mass Analysis ◽  
Surface Layers ◽  
Bulk Solids ◽  
Laser Microprobe ◽  
Laser Microprobe Mass Analysis ◽  
Laser Microprobe Mass

scholarly journals Gold’s Structural Versatility within Complex Intermetallics: From Hume-Rothery to Zintl and even Quasicrystals

2013 ◽  
Vol 1517 ◽  
Author(s):  
Gordon J. Miller ◽  
Srinivasa Thimmaiah ◽  
Volodymyr Smetana ◽  
Andriy Palasyuk ◽  
Qisheng Lin
Keyword(s):  
Complex Networks ◽  
Intermetallic Compounds ◽  
Chemical Bonding ◽  
Three Dimensional ◽  
The Other ◽  
Icosahedral Quasicrystal ◽  
Bulk Solids ◽  
Atomic Properties ◽  
Polar Intermetallics ◽  
Structural Versatility

ABSTRACTRecent exploratory syntheses of polar intermetallic compounds containing gold have established gold’s tremendous ability to stabilize new phases with diverse and fascinating structural motifs. In particular, Au-rich polar intermetallics contain Au atoms condensed into tetrahedra and diamond-like three-dimensional frameworks. In Au-poor intermetallics, on the other hand, Au atoms tend to segregate, which maximizes the number of Au-heteroatom contacts. Lastly, among polar intermetallics with intermediate Au content, complex networks of icosahedra have emerged, including discovery of the first sodium-containing, Bergman-type, icosahedral quasicrystal. Gold’s behavior in this metal-rich chemistry arises from its various atomic properties, which influence the chemical bonding features of gold with its environment in intermetallic compounds. Thus, the structural versatility of gold and the accessibility of various Au fragments within intermetallics are opening new insights toward elucidating relationships among metal-rich clusters and bulk solids.

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