The Debye Method is Used to Create 3D Structure Models of Electroactively Transformed Microcrystalline Cellulose

2021 ◽  
Vol 19 (6) ◽  
pp. 01-07
Author(s):  
Ali M. Ahmed ◽  
Qasim Shakir Kadhim ◽  
Ibrahim A. Ali
Keyword(s):  
Microcrystalline Cellulose ◽  
Short Range ◽  
Short Range Order ◽  
3D Structure ◽  
3D Models ◽  
Range Order ◽  
Ozone Treatment ◽  
Amorphous Cellulose ◽  
Diffraction Patterns ◽  
Debye Method

In this paper, we carried out the XRD results and 3D structural models of short-range order of amorphous cellulose obtained by ball milling of microcrystalline cellulose. The amorphous cellulose has the well-reproducible effect of influence of ozone treatment on its proton conductivity, which allows to use this material as a gas sensor. Calculation of the quantitative characteristics of the short-range order (radii of coordination spheres and their dispersions, coordination numbers) of amorphous cellulose was carried out from distribution pair functions curve by using the Finback-Warren method. The space atoms configurations was carried out by Debye method. After that, the models were distorted by converting into packages disoriented relative to each other layers. The X-Ray diffraction patterns were calculated for 3D models and compared with experimental curves.

Short-range order in amorphous co-sputtered Ta-Al thin films

1986 ◽  
Vol 44 ◽  
pp. 860-861
Author(s):  
J.C. Barry ◽  
R.S. Timsit ◽  
D. Landheer
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Electron Microscope ◽  
High Resolution ◽  
Short Range ◽  
Short Range Order ◽  
Range Order ◽  
Transmission Electron ◽  
Thin Film Resistors ◽  
Diffraction Patterns

Tantalum-aluminium thin films have assumed considerable technological importance since the discovery in the late 1960's that the films are useful in the fabrication of thin film resistors and capacitors. It is generally claimed that these films, when prepared by co-sputtering Ta and Al, are amorphous over a range of Ta concentrations extending approximately from 15 to 75 at%, and are crystalline beyond this range. Diffuse electron diffraction patterns and ‘mottle pattern’ transmission electron micrographs are typical characteristics of the amorphous phase. In this present study we have attempted to identify any atomic short range order in the amorphous Ta-Al films and to follow the changes in this order as the Ta concentration increases across the amorphous/crystalline transition. The co-sputtered Ta-Al films of ≈100A thickness were examined in a high resolution 4000EX electron microscope (top entry, ±15°(x,y) tilt, Cs = 1.0mm ) at 400kV.

Short-Range Order and Nanocrystallization in Amorphous Zr-Ti-Cu-Ni-Al

1999 ◽  
Vol 580 ◽  
Author(s):  
L. Q. Xing ◽  
Xiaofeng Gu ◽  
T. A. Lusby ◽  
A. J. Melmed ◽  
T. C. Hufnagel
Keyword(s):  
Amorphous Alloys ◽  
Short Range ◽  
Short Range Order ◽  
Structural Changes ◽  
Range Order ◽  
Transmission Electron ◽  
Microscope Images ◽  
Diffraction Patterns ◽  
Kinetics Of ◽  
Ti Content

AbstractWe have examined the effect of Ti content on the crystallization kinetics of Zr-based amorphous alloys. In Zr59Ti3Cu20Ni8Al10, annealing above the glass transition temperature produces 50-100 nm crystalline precipitates, as seen in transmission electron microscope images. In contrast, TEM images and diffraction patterns from annealed Zr54.5Ti7.5Cu20Ni8Al10 show no evidence of crystalline phase formation. Structural changes upon annealing do occur in this alloy, however, as revealed by field ion microscopy. The effect of Ti is to favor the formation of clusters of short-range order; this tendency for clustering is apparently the cause of difference in crystallization behavior between the two alloys.

Short-range order in defective half-Heusler thermoelectric crystals

2019 ◽  
Vol 12 (5) ◽  
pp. 1568-1574 ◽  
Author(s):  
Kaiyang Xia ◽  
Pengfei Nan ◽  
Shihua Tan ◽  
Yumei Wang ◽  
Binghui Ge ◽  
...  
Keyword(s):  
Electron Diffraction ◽  
Short Range ◽  
Short Range Order ◽  
Range Order ◽  
Diffraction Patterns

The discovery of short-range order, associated with diffuse bands in electron diffraction patterns, provides new insights into defective half-Heusler thermoelectric crystals.

Ordering in Ni4Mo by TEM and APFIM

1987 ◽  
Vol 45 ◽  
pp. 214-215
Author(s):  
E.A. Kenik ◽  
T.A. Zagula ◽  
M.K. Miller ◽  
J. Bentley
Keyword(s):  
Electron Irradiation ◽  
Low Temperatures ◽  
Short Range ◽  
Atom Probe ◽  
Range Order ◽  
Considerable Time ◽  
Probe Field ◽  
Disordered Phase ◽  
Transmission Electron ◽  
Diffraction Patterns

The state of long-range order (LRO) and short-range order (SRO) in Ni4Mo has been a topic of interest for a considerable time (see Brooks et al.). The SRO is often referred to as 1½0 order from the apparent position of the diffuse maxima in diffraction patterns, which differs from the positions of the LRO (D1a) structure. Various studies have shown that a fully disordered state cannot be retained by quenching, as the atomic arrangements responsible for the 1½0 maxima are present at temperatures above the critical ordering temperature for LRO. Over 20 studies have attempted to identify the atomic arrangements associated with this state of order. A variety of models have been proposed, but no consensus has been reached. It has also been shown that 1 MeV electron irradiation at low temperatures (∼100 K) can produce the disordered phase in Ni4Mo. Transmission electron microscopy (TEM), atom probe field ion microscopy (APFIM), and electron irradiation disordering have been applied in the current study to further the understanding of the ordering processes in Ni4Mo.

Short-range order effects in amorphous FexSi1-x/Si multilayers induced by preparation conditions

1998 ◽  
Vol 08 (PR2) ◽  
pp. Pr2-175-Pr2-178 ◽  
Author(s):  
G. T. Pérez ◽  
F. H. Salas ◽  
R. Morales ◽  
L. M. Álvarez-Prado ◽  
J. M. Alameda
Keyword(s):  
Short Range ◽  
Short Range Order ◽  
Range Order ◽  
Order Effects ◽  
Preparation Conditions

SHORT RANGE ORDER IN QUENCHED Ni4Mo

1977 ◽  
Vol 38 (C7) ◽  
pp. C7-173-C7-173
Author(s):  
J.-P. CHEVALIER ◽  
W. M. STOBBS
Keyword(s):  
Short Range ◽  
Short Range Order ◽  
Range Order
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