The Structure of Molten Nickel-Phosphorus Alloys

1977 ◽  
Vol 32 (12) ◽  
pp. 1506-1511 ◽  
Author(s):  
Yoshio Waseda ◽  
J. M. Toguri
Keyword(s):  
Interatomic Distance ◽  
Composition Range ◽  
Binary Alloys ◽  
Random Packing ◽  
Experimental Results ◽  
X Ray ◽  
X Ray Scattering ◽  
Partial Structures ◽  
Nearest Neighbours ◽  
Molten Nickel

Abstract Detailed analyses of the x-ray scattering intensities of molten nickel-phosphorus alloys ranging from 0 to 30 at.% phosphorus have been carried out. The three partial structures required to characterize the binary alloys have been estimated. The interatomic distance of P -P pairs was found to be about 3.2 Å, and thus phosphorus atoms cannot exist as nearest neighbours in molten Ni-P alloys, at least within the present experimental composition range. It was confirmed that this arrangement of atoms contributed to the characterisic structure in which the expansion of the Ni -Ni distance was unavoidable. Calculations have also been carried out in terms of the dense random-packing model of binary spheres. The calculations were consistent with the experimental results.

Diffuse X-Ray Scattering by Disordered Binary Alloys

1951 ◽  
Vol 82 (2) ◽  
pp. 279-280 ◽  
Author(s):  
William J. Taylor
Keyword(s):  
Binary Alloys ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

Diffuse X-Ray Scattering by Disordered Binary Alloys. II

1951 ◽  
Vol 84 (1) ◽  
pp. 148-149
Author(s):  
William J. Taylor
Keyword(s):  
Binary Alloys ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

Ultra Small Angle X-Ray Scattering for Pure Tristearin and Tripalmitin: Model Predictions and Experimental Results

2014 ◽  
Vol 9 (4) ◽  
pp. 304-313 ◽  
Author(s):  
Fernanda Peyronel ◽  
Bonnie Quinn ◽  
Alejandro G. Marangoni ◽  
David A. Pink
Keyword(s):  
Small Angle ◽  
Experimental Results ◽  
X Ray ◽  
X Ray Scattering ◽  
Model Predictions ◽  
Ray Scattering

Numerical Reconstruction of Porous Architecture for Suspension Plasma Sprayed Coatings

2021 ◽  
Author(s):  
Yongli Zhao ◽  
Zhimeng Yang ◽  
Juhong Wen ◽  
Marie-Pierre Planche ◽  
François Peyraut ◽  
...  
Keyword(s):  
Experimental Results ◽  
Numerical Representation ◽  
X Ray ◽  
Numerical Reconstruction ◽  
X Ray Scattering ◽  
Porous Architecture ◽  
Microstructural Model ◽  
Coating Microstructure ◽  
Plasma Sprayed Coatings ◽  
Plasma Sprayed

Abstract The porous architecture of coatings has a significant influence on the coating performances and thus should be properly designed for the intended applications. For simulating the coating properties, it is necessary to determine the numerical representation of the coating microstructure. In this study, YSZ coatings were manufactured by suspension plasma spray (SPS). Afterwards, the porous architecture of as-prepared coatings was investigated by the combination of three techniques, imaging analysis, Ultra Small Angle X-ray Scattering (USAXS), and X-ray transmission. A microstructural model for reconstructing the porous architecture of the SPS coating was subsequently computed according to the collected experimental results. Finally, the coating thermal properties were simulated based on the model and were compared with the experimental results.

Local Atomic Arrangement of Amorphous Zr50Ni50 Alloy Analyzed by AXS-RMC Method

2012 ◽  
Vol 508 ◽  
pp. 146-151
Author(s):  
T. Kawamata ◽  
Yokoyama Yoshihiko ◽  
Kazumasa Sugiyama
Keyword(s):  
Hard Sphere ◽  
Nearest Neighbor ◽  
Chemical Interaction ◽  
Random Packing ◽  
Atomic Configuration ◽  
X Ray ◽  
Topological Features ◽  
X Ray Scattering ◽  
Local Ordering ◽  
Short Range Ordering

Structure of Zr50Ni50Amorphous Alloy Was Analyzed by Anomalous X-Ray Scattering (AXS) Coupled with Reverse Monte-Carlo (RMC) Simulation. Topological Features in the Nearest Neighbor Atomic Configuration Clearly Suggest that the Strong Chemical Interaction between Ni and Zr Breaks the Icosahedral-Like Local Ordering Structure Common in the Dense Random Packing of Hard Sphere (DRPHS) Model. Nevertheless, the Structure of Zr50Ni50Shows No Further Features Related to the Crystal-Like Chemical Short Range Ordering (CSRO).

scholarly journals Structure Investigation on Liquid Tellurium by X-Ray and Neutron Scattering

1992 ◽  
Vol 47 (7-8) ◽  
pp. 833-840 ◽  
Author(s):  
Walter Hoyer ◽  
Hartmut Neumann ◽  
Manfred Wobst
Keyword(s):  
Neutron Scattering ◽  
Coordination Number ◽  
Fourier Transformation ◽  
Structure Investigation ◽  
X Ray ◽  
X Ray Scattering ◽  
Integration Limit ◽  
Nearest Neighbours ◽  
Neighbour Shell ◽  
A Chain

Abstract We present the results of neutron and X-ray scattering experiments on liquid tellurium. No dependence on temperature of the radius and the coordination number of the first neighbour shell has been found in the temperature range between 460 °C and 550 °C. We investigate the influence of the truncation of the Fourier transformation on the determined coordination number of nearest neighbours and on the shape of the second coordination maximum at both, the lower and upper integration limit. The structure of liquid tellurium can be described in terms of a chain-like atomic arrangement with two bonds per atom

X -ray scattering and covalent bonding in germanium

1967 ◽  
Vol 298 (1455) ◽  
pp. 395-401 ◽  
Keyword(s):  
Atomic Number ◽  
Recent Observation ◽  
Covalent Bonding ◽  
High Accuracy ◽  
Experimental Results ◽  
Alternative Possibilities ◽  
Present Evidence ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

The effects of covalent bonding on Bragg X -ray scattering in germanium are predicted in terms of the results which have emerged from detailed studies of such effects evident in accurate X -ray data for silicon and diamond. Alternative possibilities consistent with trends found in these lighter systems are considered, and it is shown that one of the possibilities is in accord with a recent observation that | f (222)| = 0⋅14 ± 0⋅01. The predictions of nonspherical scattering in the orthodox data for this system are compared with the X -ray measurements of DeMarco & Weiss to illustrate how the requirements of high accuracy in experimental results rise steeply with increase in atomic number. It is shown that, on the present evidence from the 222 reflexion, the effects of covalent bonding in germanium will produce a peak of approximately 0⋅18 e/Å 3 at the midpoint of each bond. The need for more precise measurements in the future is pointed out.

Cocrystallization in random copolymers of poly(β-hydroxybutyrate-co-β-hydroxyvalerate) and its effect on crystalline morphology

1995 ◽  
Vol 73 (11) ◽  
pp. 2094-2100 ◽  
Author(s):  
William J. Orts ◽  
David L. VanderHart ◽  
Terry L. Bluhm ◽  
Robert H. Marchessault
Keyword(s):  
Solid State ◽  
Small Angle ◽  
Crystalline Phase ◽  
Solid State Nmr ◽  
Composition Range ◽  
Crystalline Lattice ◽  
Crystalline Morphology ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

Small-angle X-ray scattering (SAXS) and solid state CPMAS l3C NMR were used to describe the crystalline morphology of a series of bacterially produced poly(β-hydroxybutyrate-co-β-hydroxyvalerate) copolymers containing random distributions of 3-hydroxybutyrate (3HB) and 3-hydroxyvalerate (3HV). Modeling of SAXS results showed that the morphology of this isodimorphic system is better described by two phases, crystalline and amorphous, having defects within each domain. This is in contrast to a model with a large interfacial region between phases. For the 3HV composition range 0–27 mol%, the polymer crystallizes in a poly(β-hydroxybutyrate)-type crystalline lattice. Solid state NMR results showed that there is significant incorporation of the 3HV minor component into the poly(β-hydroxybutyrate) crystalline phase over this composition range. The ratio of the 3HV content in the crystalline phase relative to the overall 3HV content is not linear, but increases with increasing 3HV. For the 21 and 27% 3HV samples, the 3HV content in the crystalline phase is as much as 2/3 of the overall 3HV content. Inclusion of 3HV is correlated to an increase in crystalline disorder (as measured by SAXS), implying that it is easier to accommodate the bulkier 3HV comonomer into a crystalline region that already contains defects. Keywords: bacterial polyesters, poly(3-hydroxyalkanates), small-angle X-ray scattering, solid state NMR, cocrystallization.

scholarly journals Microscopic Understanding of the Ionic Networks of “Water-in-Salt” Electrolytes

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Xinyi Liu ◽  
Zhou Yu ◽  
Erik Sarnello ◽  
Kun Qian ◽  
Soenke Seifert ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Physical Properties ◽  
High Temperatures ◽  
Structural Variation ◽  
Experimental Results ◽  
Temperature Changes ◽  
X Ray ◽  
X Ray Scattering ◽  
Low Concentrations ◽  
Electrochemical Window

“Water-in-salt” electrolytes with excellent electrochemical and physical properties have been extensively investigated. However, the structural understanding of the lithium bis(trifluoromethane sulfonyl)imide (LiTFSI) in water is still lacking. Here, we perform synchrotron X-ray scattering to systemically study the structural variation of TFSI anions in an aqueous solution under a variety of concentrations and temperatures. There are two different solvation structures in the solution: TFSI- solvated structure and TFSI- network. As the concentration increases, the TFSI- solvated structure gradually disappears while the TFSI- network gradually forms. Even at relatively low concentrations, the TFSI- network can be observed. Our experimental results show that these two structures can coexist at a particular concentration, and temperature changes will lead to one structure’s formation or disappearance. Also, the TFSI- network is the key to obtain a stable electrochemical window under relatively high temperatures.

Sign in / Sign up

Export Citation Format

Share Document