Study of structure and oxygen stoichiometry of Cu-doped Ba0.5Sr0.5FeΟ3-δ by neutron diffraction technique

2020 ◽  
Author(s):  
H. Avianti ◽  
Fitriana ◽  
A. Insani ◽  
S. Suasmoro
Keyword(s):  
Neutron Diffraction ◽  
Oxygen Stoichiometry ◽  
Neutron Diffraction Technique

Application of Neutron Diffraction to Measure Residual Strains in Various Engineering Composite Materials

1991 ◽  
Vol 113 (1) ◽  
pp. 51-59 ◽  
Author(s):  
S. Majumdar ◽  
J. P. Singh ◽  
D. Kupperman ◽  
A. D. Krawitz
Keyword(s):  
Crystal Structure ◽  
Composite Materials ◽  
Neutron Diffraction ◽  
Measured Data ◽  
Unidirectional Fibers ◽  
Residual Strains ◽  
Neutron Diffraction Technique ◽  
Multiphase Composite ◽  
Oriented Single Crystal ◽  
Ceramic Matrices

An experimental neutron diffraction technique was used to measure residual strains that developed in multiphase composite materials during postfabrication cooling as a result of thermal expansion mismatch or volume expansion due to change in crystal structure. The reinforcement geometries that were studied include unidirectional fibers, randomly oriented single crystal whiskers, and equiaxed particles. Both metal and ceramic matrices and reinforcements were considered. In some cases, the measured data compared fairly well with predictions based on simple elastic models. In other cases, either creep was shown to relax the residual strains during cooling, or the interpretation of the measured data contained uncertainties due to texture in the samples or lack of a clearly defined crystal structure for the reinforcement phase.

Three-dimensional spatially resolved neutron diffraction from a disordered vortex lattice

2011 ◽  
Vol 44 (2) ◽  
pp. 414-417
Author(s):  
Xi Wang ◽  
Helen A. Hanson ◽  
Xinsheng Sean Ling ◽  
Charles F. Majkrzak ◽  
Brian B. Maranville
Keyword(s):  
Neutron Diffraction ◽  
Vortex Lattice ◽  
Three Dimensional ◽  
Vortex State ◽  
Prototype System ◽  
Vortex Matter ◽  
Atomic Lattice ◽  
Spatially Resolved ◽  
Neutron Diffraction Technique ◽  
Vortex Physics

The vortex matter in bulk type II superconductors serves as a prototype system for studying the random pinning problem in condensed matter physics. Since the vortex lattice is embedded in an atomic lattice, small-angle neutron scattering (SANS) is the only technique that allows for direct structural studies. In traditional SANS methods, the scattering intensity is a measure of the structure factor averaged over the entire sample. Recent studies in vortex physics have shown that it is highly desirable to develop a SANS technique that is capable of resolving the spatial inhomogeneities in the bulk vortex state. This article reports a novel slicing neutron diffraction technique using atypical collimation and an areal detector, which allows for observing the three-dimensional disorder of the vortex matter inside an as-grown Nb single crystal.

Stroboscopic time-of-flight neutron diffraction during cyclic testing using the event data recording system at J-PARC

2018 ◽  
Vol 51 (3) ◽  
pp. 630-634 ◽  
Author(s):  
Takuro Kawasaki ◽  
Yasuhiro Inamura ◽  
Takayoshi Ito ◽  
Takeshi Nakatani ◽  
Stefanus Harjo ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Electric Field ◽  
Domain Switching ◽  
Time Of Flight ◽  
Event Data ◽  
Diffraction Intensity ◽  
Time Resolved ◽  
Properties Of Materials ◽  
Neutron Diffraction Technique ◽  
Time Information

A time-resolved time-of-flight neutron diffraction technique to characterize the structural properties of materials during cyclic tests has been developed for the neutron diffractometers at J-PARC. Using this technique, diffracted neutrons and the applied cyclic conditions are recorded as event data together with time information. The amplitude and phase of the conditions of all recorded neutron signals can be specified by using the characteristics of the event data. By adopting the developed technique, the behaviors of the crystal lattice and domains of the piezoelectric material in a multilayer-type piezoelectric actuator driven by a cyclic electric field were evaluated. The developed technique enabled the collection and processing of diffraction data for all levels of the applied electric field, as opposed to only the highest and lowest levels. The variation in diffraction intensity during the application of a cyclic electric field was obtained successfully, and the hysteresis-like behaviors of both the lattice strain and the 90° domain switching were revealed.

A Study of the Cubic Phase of Solid Acetylene-d2

1975 ◽  
Vol 30 (8) ◽  
pp. 1028-1031
Author(s):  
Harri K. Koski
Keyword(s):  
Crystal Structure ◽  
Neutron Diffraction ◽  
Thermal Neutron ◽  
Powder Pattern ◽  
Cubic Phase ◽  
Narrow Temperature Range ◽  
Temperature Range ◽  
Theoretical Pattern ◽  
Neutron Diffraction Technique ◽  
High Phase

Abstract The powder pattern of crystalline cubic deuterated acetylene recorded by thermal neutron diffraction technique and the Pa3 crystal structure assigned to the high phase of C2H2 are com-pared. The observations are not in disagreement with the theoretical pattern. Values for the lattice parameters in a narrow temperature range are given.

Comparison of Neutron Diffraction Residual Stress Measurements of Steel Welded Repairs With Current Fitness-for-Purpose Assessments

2008 ◽  
Author(s):  
Anna M. Paradowska ◽  
John W. H. Price ◽  
Trevor R. Finlayson ◽  
Ronald B. Rogge ◽  
Ronald L. Donaberger ◽  
...  
Keyword(s):  
Residual Stress ◽  
Neutron Diffraction ◽  
Thick Plate ◽  
Stress Distributions ◽  
Fitness For Purpose ◽  
Stress Variation ◽  
Full Penetration ◽  
Heat Treated ◽  
Strain Stress ◽  
Neutron Diffraction Technique

In this research the neutron diffraction technique was used to investigate the residual stress distributions in carbon steel components with weld repairs. Two full penetration weld repairs were studied using a) the stringer bead and b) the temper bead weld techniques in 25 mm thick plate. The welds were not post weld heat treated. The focus of the measurements is on the values of the sub-surface and through-thickness strain/stress variation near the middle of the weld and the toe. The experimental results showed that both processes had high residual stresses particularly through the thickness. The measurements were compared with current fitness-for-purpose approaches, such as BS7910 and R6 showing that these approaches underestimated and overestimated the stresses in various regions.

Structural changes related to changes in oxygen stoichiometry in the Ba1 − yCuO2 + δ·(CO2)x system as determined by powder X‐ray and neutron diffraction

1999 ◽  
Vol 9 (10) ◽  
pp. 2599-2603 ◽  
Author(s):  
Kaisa Peitola ◽  
Maarit Karppinen ◽  
Håkan Rundlöf ◽  
Roland Tellgren ◽  
Hisao Yamauchi ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Structural Changes ◽  
Oxygen Stoichiometry ◽  
X Ray

scholarly journals SPR Characteristics Curve and Distribution of Residual Stress in Self-Piercing Riveted Joints of Steel Sheets

2017 ◽  
Vol 2017 ◽  
pp. 1-14 ◽  
Author(s):  
Rezwanul Haque ◽  
Yat C. Wong ◽  
Anna Paradowska ◽  
Stuart Blacket ◽  
Yvonne Durandet
Keyword(s):  
Residual Stress ◽  
Neutron Diffraction ◽  
Steel Sheet ◽  
Sheet Material ◽  
Stress Distributions ◽  
Steel Sheets ◽  
Riveted Joints ◽  
Lower Magnitude ◽  
Thick Joint ◽  
Neutron Diffraction Technique

Neutron diffraction was used to describe the residual stress distributions in self-piercing riveted (SPR) joints. The sheet material displayed a compressive residual stress near the joint, and the stress gradually became tensile in the sheet material far away from the joint. The stress in the rivet leg was lower in the thick joint of the softer steel sheet than in the thin joint of the harder steel sheet. This lower magnitude was attributed to the lower force gradient during the rivet flaring stage of the SPR process curve. This study shows how the residual stress results may be related to the physical occurrences that happened during joining, using the characteristics curve. The study also shows that neutron diffraction technique enabled a crack in the rivet tip to be detected which was not apparent from a cross-section.

Oxygen stoichiometry of Ba0.50Sr0.50Co0.80Fe0.20O3−δ obtained by EDTA–citrate method and measured by X-ray and neutron diffraction

2015 ◽  
Vol 306 (3) ◽  
pp. 769-773 ◽  
Author(s):  
Everton Bonturim ◽  
Vera Lucia Mazzocchi ◽  
Carlos Benedicto Ramos Parente ◽  
José Mestnik-Filho ◽  
Nelson Batista de Lima ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Oxygen Stoichiometry ◽  
Citrate Method ◽  
X Ray
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