Synthesizing of NaCo2O4 Layer with Oriented Crystal Direction by Reactive Diffusion

2017 ◽  
Vol 9 (8) ◽  
pp. 1425-1429
Author(s):  
Toshitada Shimozaki ◽  
Je-Hyun Lee ◽  
Chan-Gyu Lee ◽  
Jong-Hwa Kim
Keyword(s):  
Reactive Diffusion ◽  
Oriented Crystal ◽  
Crystal Direction

Strong-Gravity Experiments on Perovskite-Type Oxides

2014 ◽  
Vol 88 ◽  
pp. 70-73
Author(s):  
Makoto Tokuda ◽  
Khandaker Jahirul Isram ◽  
Yudai Ogata ◽  
Yoji Mine ◽  
Tadao Nishiyama ◽  
...  
Keyword(s):  
Colossal Magnetoresistance ◽  
Crystalline State ◽  
Condensed Matter ◽  
Floating Zone ◽  
Magnetoresistance Effect ◽  
Oriented Crystal ◽  
Zone Method ◽  
Crystal Direction ◽  
Strong Gravity ◽  
Perovskite Type

Strong gravitational field causes the displacement or/and sedimentation of atoms in solids, by which we can changes the crystalline state or/and composition in multicomponent condensed matter. Perovskite-type doped manganite, La1-xSrxMnO3(LSMO) has unique magnetoresistance effect which is called “colossal magnetoresistance (CMR)”. In this study, the strong gravity experiment (0.40x106G, 400°C, 20h) was performed on the LSMO oriented crystal to examine the change in composition or structure. The LSMO crystal whose growing crystal direction is normal to (214) plane was prepared by the floating zone method. The EPMA and XRD results of the gravity sample revealed that the La compositions decrease in the crystal grain, while the structure did not change much. The SQUID analysis showed that the magnetic property of the gravity sample had changed.

Reactive diffusion in W–Mo–Si thin films

2010 ◽  
Vol 103 (1) ◽  
pp. 111-116 ◽  
Author(s):  
A. Derafa ◽  
M.-C. Record ◽  
D. Mangelinck ◽  
R. Halimi ◽  
A. Bouabellou
Keyword(s):  
Thin Films ◽  
Reactive Diffusion

Hybrid twinning – a cooperative type of oriented crystal association

2005 ◽  
Vol 220 (4) ◽  
Author(s):  
Massimo Nespolo ◽  
Giovanni Ferraris
Keyword(s):  
Oriented Crystal

AbstractThe reticular theory of twinning is extended to include the contribution of different, coexisting sublattices that consist of quasi-restored nodes (cooperative sublattices) and are characterized by a specific superposition index. The overall degree of quasi-restoration of the twin lattice is a function of the superposition index of the cooperative sublattices, and is expressed by a new parameter, called

An Overview of the Interdiffusion Studies in Mo-Si and W-Si Systems

2014 ◽  
Vol 354 ◽  
pp. 79-83
Author(s):  
Soumitra Roy ◽  
Soma Prasad ◽  
Aloke Paul
Keyword(s):  
Crystal Structures ◽  
Atomic Number ◽  
Diffusion Coefficients ◽  
Relative Increase ◽  
The Other ◽  
Reactive Diffusion ◽  
Refractory Elements ◽  
Other Hand ◽  
Two Systems ◽  
Diffusion Rates

The growth of phases by reactive diffusion in Mo-Si and W-Si systems are compared. The crystal structures of MSi2 and M5Si3 phases (M = Mo, W) are similar in these two systems. However, the diffusion rates of the components change systematically with a change in the atomic number. Integrated diffusion coefficients in both phases increase with an increasing atomic number of refractory elements i.e. from Mo to W. On the other hand, the ratio of diffusivities of the components decreases. This indicates a relative increase in the diffusion rates of the metal components with increasing atomic number and a difference in defects concentrations in these two systems.

Influences of Silicon Crystal Anisotropy in Nano-Machining Processes Using AFM

2013 ◽  
Author(s):  
Yachao Wang ◽  
Jing Shi ◽  
Xinnan Wang
Keyword(s):  
Normal Load ◽  
Silicon Crystal ◽  
Single Crystal Silicon ◽  
Transformation Mechanism ◽  
Machining Processes ◽  
Crystal Silicon ◽  
Normal Loading ◽  
Crystal Direction ◽  
Four Levels ◽  
Cutting Mechanisms

Atomic force microscope (AFM) machining has the potential to become an essential technology for manufacturing micro/nano-scale devices. In literature, this technique has been successfully employed to machine various types of materials, including semiconductor materials and metals. However, the effect of material anisotropy in terms of crystal direction is rarely considered in the existing studies. In this paper, we conduct nano-scratching experiments on the (1 0 0) plane of single crystal silicon surface with a diamond tip in an AFM machine. Three levels of crystal direction of nano-scratching are considered. Four levels of normal loading are applied. Machining performances are mainly evaluated by the groove morphology. Also, the wear coefficients and scratch ratio are calculated to the anti-wear performance. Based on the pile up volume and cutting volume respectively, the presence of the ploughing and cutting mechanisms is determined. The experiment results indicate that the applied normal load significantly affect the groove depth and debris morphology. The scratching direction has a pronounced effect on the friction coefficient and the calculated scratching hardness. By observing the debris morphology and cracks formation, the dependence of ductile to brittle transformation mechanism of silicon machining on the crystal direction is also discussed.

scholarly journals Kinetics of Solid-State Reactive Diffusion in the Cu/Zn System

2017 ◽  
Vol 58 (1) ◽  
pp. 16-22 ◽  
Author(s):  
Yoshiki Takamatsu ◽  
Minho O ◽  
Masanori Kajihara
Keyword(s):  
Solid State ◽  
Reactive Diffusion ◽  
Kinetics Of
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