Rhombohedral distortion analysis of ultra-thin Pt(111) films deposited under Ar–N2atmosphere

2014 ◽  
Vol 47 (5) ◽  
pp. 1490-1501 ◽  
Author(s):  
Takashi Harumoto ◽  
Takumi Sannomiya ◽  
Shinji Muraishi ◽  
Ji Shi ◽  
Yoshio Nakamura
Keyword(s):  
Lattice Distortion ◽  
Lattice Parameter ◽  
Nitrogen Atmosphere ◽  
Geometrical Parameters ◽  
Lattice Deformation ◽  
Analysis Method ◽  
Rhombohedral Distortion ◽  
Distortion Analysis ◽  
Rotationally Symmetric ◽  
Pt Films

A rhombohedral analysis method for analysing the lattice distortion in a (111)-textured face-centred cubic film under rotationally symmetric stress is proposed. Because no material constants, such as diffraction elastic constants, are required, the expressions of the distortion, namely the angle and the lattice parameter, are universal and can be readily used to compare different films. Using this rhombohedral distortion analysis method, (111)-textured Pt films deposited under argon–nitrogen atmosphere are systematically investigated, and the thickness-dependent lattice deformation in as-deposited and annealed films is described by the two geometrical parameters of the rhombohedral cell.

scholarly journals Rhombohedral distortion analysis on Pd(111) films under hydrogen loading

2017 ◽  
Vol 73 (a2) ◽  
pp. C1266-C1266
Author(s):  
Takashi Harumoto ◽  
Takashi Ishiguro ◽  
Ji Shi ◽  
Yoshio Nakamura
Keyword(s):  
Rhombohedral Distortion ◽  
Distortion Analysis

scholarly journals Rhombohedral Distortion Analysis of (111)-textured fcc Film

Materia Japan ◽  
2015 ◽  
Vol 54 (12) ◽  
pp. 612-615
Author(s):  
Takashi Harumoto ◽  
Takumi Sannomiya ◽  
Shinji Muraishi ◽  
Ji Shi ◽  
Yoshio Nakamura
Keyword(s):  
Rhombohedral Distortion ◽  
Distortion Analysis

INVESTIGATION OF NATURAL FREQUENCIES OF COMPLEX WATER PIPELINES

Akustika ◽  
2021 ◽  
pp. 2-7
Author(s):  
Antonina Sekacheva ◽  
Alexander Noskov ◽  
Lilia Pastukhova
Keyword(s):  
Modal Analysis ◽  
Natural Frequencies ◽  
Residential Buildings ◽  
Geometrical Parameters ◽  
Analysis Method ◽  
Noise And Vibration ◽  
Software Packages ◽  
Resonant Modes ◽  
Water Pipelines ◽  
Ansys Workbench

The article deals with the problem of emergence of noise and vibration from pipelines of multi-storey residential buildings. The determination method of risk of increased noise and vibration using the modal analysis method in the ANSYS Workbench software packages is offered. The numerical modal analysis of straight pipeline sections with various geometrical parameters is carried out. Risk predictions of possible resonant modes are made. The maximum allowed span lengths between supports for sections of pipeline systems with a diameter of 15, 20, 25, 32, 40, 48, 60, 70, 102, 114, 140, 168, 180, 219 mm are offered.

scholarly journals First-Principles Calculations of High-Pressure Physical Properties of Ti0.5Ta0.5 Alloy

Symmetry ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 796
Author(s):  
Fang Yu ◽  
Yu Liu
Keyword(s):  
High Pressure ◽  
Physical Properties ◽  
First Principles ◽  
Theoretical Study ◽  
Applied Pressure ◽  
Lattice Parameter ◽  
Physical Parameters ◽  
First Principles Calculations ◽  
Analysis Method ◽  
Metallic Bond

In this paper, an in-depth theoretical study on some physical properties of Ti0.5Ta0.5 alloy with systematic symmetry under high pressure is conducted via first-principles calculations, and relevant physical parameters are calculated. The results demonstrate that the calculated parameters, including lattice parameter, elastic constants, and elastic moduli, fit well with available theoretical and experimental data when the Ti0.5Ta0.5 alloy is under T = 0 and P = 0 , indicating that the theoretical analysis method can effectively predict the physical properties of the Ti0.5Ta0.5 alloy. The microstructure and macroscopic physical properties of the alloy cannot be destroyed as the applied pressure ranges from 0 to 50GPa, but the phase transition of crystal structure may occur in the Ti0.5Ta0.5 alloy if the applied pressure continues to increase according to the TDOS curves and charge density diagram. The value of Young’s and shear modulus is maximized at P = 25   GPa . The anisotropy factors A ( 100 ) [ 001 ] and A ( 110 ) [ 001 ] are equal to 1, suggesting the Ti0.5Ta0.5 alloy is an isotropic material at 28 GPa, and the metallic bond is strengthened under high pressure. The present results provide helpful insights into the physical properties of Ti0.5Ta0.5 alloy.

Lattice Defect Research by Kossel Technique and Deformation Analysis

1965 ◽  
Vol 9 ◽  
pp. 23-34 ◽  
Author(s):  
Masataka Umeno ◽  
Hideaki Kawabe ◽  
Gunji Shinoda
Keyword(s):  
Electron Probe ◽  
Lattice Distortion ◽  
Lattice Defect ◽  
Deformation Analysis ◽  
Fragmentation Model ◽  
Lattice Deformation ◽  
Electron Probe Microanalyzer ◽  
Kossel Technique ◽  
Lattice Distortions ◽  
Deformation Modes

AbstractAn electron probe microanalyzer (EPMA) was applied for the deformation analysis of aluminum single crystals. The lattice distortions caused by tensile stresses were observed by Kossel patterns, which are sensitive in their change of shape to lattice distortion. The effects of lattice distortion would appear as splitting, tearing, bending, broadening, disappearance, and shift of Kossel lines. This distortion behavior can be analyzed successfully. The jnhomogeneities and anisotropy appearing on every line were explained by the crystallographic cons (deration of slip mechanisms. The lattice distortions and corresponding changes in Kossel patterns depend on the direction of elongation ; the deformation modes of those crystals which show typical fee behavior in stress-strain curves can be reasonably explained by a fragmentation model. It was also found that there are some portions in Kossel patterns where some specific Kossel lines, i.e., {200} and {111}, are very sensitive to lattice deformation.

Development of Welding Distortion Analysis Method Using Residual Strain as Boundary Condition

2008 ◽  
Vol 580-582 ◽  
pp. 649-654 ◽  
Author(s):  
Yun Sok Ha ◽  
Si Hoon Cho ◽  
Tae Won Jang
Keyword(s):  
Boundary Condition ◽  
Boundary Conditions ◽  
Residual Strain ◽  
The Other ◽  
Welding Distortion ◽  
Thermal Distortion ◽  
Analysis Method ◽  
Distortion Analysis ◽  
Direct Input ◽  
Inherent Strain

There are two ways of conventional thermal distortion analysis. One is thermal elastoplastic analysis and the other is equivalent forces method based on inherent strain. The former needs exorbitant analysis time, while the latter cannot obtain stress results and requires more time with loads modeling on curved plates. To solve those time-consuming problems, a new kind of thermal distortion analysis method was developed. In this method, inherent strains are devised to be used as direct input factors as boundary conditions. Suggested analysis method was already adopted at welding distortion analysis of large hull block, which was considered as impossible.

P23 Generalization of X-ray stress analysis method for single crystals with unknown stress-free lattice parameter

2006 ◽  
Vol 2006 (0) ◽  
pp. 565-566
Author(s):  
Kazuyuki SUEYOSHI ◽  
Hiroshi SUZUKI ◽  
Koichi AKITA ◽  
Muneyuki IMAFUKU ◽  
Shin-ichi OHYA
Keyword(s):  
Stress Analysis ◽  
Single Crystals ◽  
Lattice Parameter ◽  
Free Lattice ◽  
Analysis Method ◽  
X Ray

Effect of Solute Atoms on the Thermal Property of Mg Alloys

2015 ◽  
Vol 817 ◽  
pp. 319-324
Author(s):  
Jia Wei Yuan ◽  
Kui Zhang ◽  
Xing Gang Li ◽  
Ting Li ◽  
Yong Jun Li ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermal Resistance ◽  
Lattice Distortion ◽  
Atomic Radius ◽  
Lattice Parameter ◽  
Mg Alloys ◽  
Significant Difference ◽  
Solute Atoms ◽  
The Difference ◽  
Zn Alloys

The reason for the distinct difference in the thermal conductivities of different series of Mg alloys was investigated.The crystallographic lattice parameter and the thermal conductivity of Mg–Zn, Mg–Al, and Mg–Gd binary alloys, which all contain the same atomic percentage of the solutes were measured. The Mg–Zn alloys exhibited the highest thermal conductivity and the smallest lattice distortion, and Mg–Gd alloys exhibited lowest thermal conductivity and largest lattice distortion, respectively. Results indicate that the thermal conductivity of the Mg alloys depends on the difference in atomic radius of the solute and matrix atoms. Therefore, the reason for the Mg-7Gd-5Y-0.5Nd-0.5Zr alloy components have excellent thermal resistance is the serious lattice distortion caused by the significant difference in the atomic radius between the solute and matrix atoms.

scholarly journals Characteristics of Cu-Al2O3 composites of various starting particle size obtained by high-energy milling

2009 ◽  
Vol 74 (5) ◽  
pp. 595-605 ◽  
Author(s):  
Viseslava Rajkovic ◽  
Dusan Bozic ◽  
Milan Jovanovic
Keyword(s):  
Particle Size ◽  
Internal Oxidation ◽  
Lattice Distortion ◽  
Copper Matrix ◽  
High Energy ◽  
Lattice Parameter ◽  
Constant Amount ◽  
High Energy Milling ◽  
Al2o3 Composite ◽  
Powder Particles

The powder Cu-Al2O3 composites were produced by high-energy milling. Various combinations of particle size and mixtures and approximately constant amount of Al2O3 were used as the starting materials. These powders were separately milled in air for up to 20 h in a planetary ball mill. The copper matrix was reinforced by internal oxidation and mechanical alloying. During the milling, internal oxidation of pre-alloyed Cu-2 mass %-Al powder generated 3.7 mass % Al2O3 nano-sized particles finely dispersed in the copper matrix. The effect of different size of the starting copper and Al2O3 powder particles on the lattice parameter, lattice distortion and grain size, as well as on the size, morphology and microstructure of the Cu-Al2O3 composite powder particles was studied.

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