Search results

It is hoped that the nucleated dislocation or twinning in fcc structure, will increase the fracture toughness because it is easy to see in Fig. 3 that the crack blunts gradually after the nucleation of twinning/dislocation.
In every case we can see that all the fractures show a very pronounced blunting behaviour for the fracture of copper polycrystal, which is consistent with most fcc structures exhibiting a blunt fracture.
This raises an interesting question of how to improve the brittle/ductile fracture in fcc and bcc structures (polycrystal), or even finding a brittle-ductile transition using molecular dynamics simulation which has already been confirmed in in situ experiments [30, 31].
Yang, Brittle versus ductile transition of nanocrystalline metals, International Journal of Solids and Structures, 45 (2008) 3897-3907
Andersen, Molecular dynamics study of melting and freezing of small Lennard-Jones clusters, Journal of Physical Chemistry, 91 (1987) 4950-4963

Under the condition of nomal charge and discharge, lithium ions in the layered structure of the carbon materials and between the layers of the layered structure of oxide embed or prolapse.
Generally the level spacing changes are caused, but the crystal structure is not destroyed.
During the no-discharge process, the chemical structure of the anode material is basically unchanged.
In Li4Ti5O12 structure it only contains tetravalent Ti4+ ion.
Journal of Physical Chemistry, Vol.24(2008), p.1002-p.1006

The ordered arrangements easily transform into normal fluorite structure in oxidation atmosphere [17-19].
Therefore, if ultimately uniform dispersion of Zr ions would be achieved, a similar circumstance around Ce ions to ordered-cation arrangement structure would be achieved and theoretical OSC performance could be expected even in the cation disordered structure.
The CeO2-rich side calculation is based on the studied about crystal structure of pyrochlore (Ce2Zr2O7).
Therefore oxygen on the 4 zirconium coordinated oxygen might be released predominantly even in the fluorite structure.
Evans: An Introduction to Crystal Chemistry (Cambridge University Press; 2 edition (1964))

MgSe crystallizes in the zinc-blende (ZB), wurzite (WZ) and rock-salt (RS) structures [3].
The possible stable ground state structure of MgSe is the ZB [4].
The structure was deemed to have converged when the forces on all the atoms were less than 0.01 eV/.
The geometric structures are shown in Fig. 1.
Journal of Physics and Chemistry of Solids, 69(1):60-69, (2008)

State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China Keyword: Zn2GeO4 afterglow traps Mn2+ Abstract: Zn2GeO4:Mn2+0.01, Pr3+ 0.01 long afterglow phosphors were synthesized by the high temperature solid state reaction.
The X-Ray diffraction phases indicate that the sample have a crystal structure of Zn2GeO4 and was not influenced by co-doped Mn2+, Pr3+ no influence for crystal structure.
Results and discussion phase structure Structure of the Zn2GeO4:Mn2+0.01, Pr3+ 0.01 powder was studied by means of the XRD power diffraction technique.
The Zn2GeO4, whose structure is constructed by corner-shared ZnO4 tetrahedral and GeO4 tetrahedral, has a rhombohedra until cell with space group R[5] and has a phenacite structure with lattice constants of a=b=14.231Å and c=9.53Å.
The doped of Mn2+ or Pr3+ has little influence on the structure of the Zn2GeO4 lattice.

Data types and data structures in cluster analysis
(11) Data structure.
In the cluster analysis, the following two structures [5]
Rows and columns represent different entities, the general form of this data structure to relational tables.
Most of the cluster algorithms are using this data structure.

The substitution of Fe and Ba by different elements in the crystal structure of the prototype BaFe12O19 with magnetoplumbite type structure is an efficient method for modification and tuning of these dielectric and magnetic losses as well as the physical properties in whole.
This behavior can be explained by the distortions in the crystal structure caused by the Mn substitution.
This is typical for the ferrites with magnetoplumbite structure.
Mashkovtseva, Growing doped barium ferrite single crystals using the flux method, Doklady physical chemistry. 449 (2013) 39-40
Perrotta, The crystal structure and refinement of ferromagnetic barium ferrite, BaFe12O19, Z.

An increased interest in the vacuum carburizing concept has developed in the last few years as a result of the progress in designing modern furnaces for thermo-chemical treatment under low pressure and better physico-chemistry knowledge of these processes [3,4,5,6].
Microscopic Structure.
In Figure 4(a), the twin martensitic structure and the retained austenite within the matrix are clearly observed.
The twin martensitic structure and its diffraction pattern are shown in Figures 4(b) and 4(c) respectively.
Because the case structure is primarily high carbon tempered martensite dispersed some carbides, it can be postulated that the static fracture toughness of the high carbon tempered martensitic structure in the case is tougher than that in the core.

Hexaaluminate or substituted hexaaluminate Hexaaluminates materials have defined structures, they contain alkali or rare earth oxides and a-alumina which were indicated as preventing coke formation [26].
Results showed that well-defined La2Zr2O7 powders with a single-phase pyrochlore structure behave well resistance to carbon deposition.
The size, shape, structure, and surface composition have significant effects on the coke resistance of Ni catalysts, among which the size effect is the most important.
Development of new solid solution or improvement of present solid solution, such as Ni-MgO with well-defined structures; 3.
Journal of Natural Gas Chemistry.

This paper studied the mechanism and characteristics of the front electrodes based upon some experiments and the micro structures by SEM.
Mechanism Analysis Structure analysis of Si solar cells.
The structure of silicon solar cells is a parallel multi-layer structure, which stems from its special manufacturing process [3].
Fig. 1 (right) is the schematic structure of SiNx antireflection coating.
Kim, Effect of glass frit chemistry on the physical and electrical properties of thick-film Ag contacts for silicon solar cells, J.