scholarly journals Equivalent Analysis of Thermo-Dynamic Blow-Off Impulse under X-ray Irradiation

2021 ◽  
Vol 11 (19) ◽  
pp. 8853
Author(s):  
Dengwang Wang ◽  
Yong Gao ◽  
Wei Chen ◽  
Jing Zhang ◽  
Sheng Wang
Keyword(s):  
Damage Parameter ◽  
Mechanical Effect ◽  
The Self ◽  
Damage Mode ◽  
Radiation Load ◽  
X Ray ◽  
Thermodynamic Effect ◽  
Thermodynamic Effects ◽  
Equivalent Method ◽  
Aluminium Target

X-ray thermodynamic effect is an important damage mode for spacecraft. Blow-off impulse as the main thermodynamic damage parameter has been widely studied by combining laboratory and numerical simulations. In this paper, most calculations and analyses have been carried out by using the self-developed software RAMA, including the equivalent calculation of blow-off impulse of monoenergetic and blackbody X-ray, and soft/hard blackbody X-ray irradiated at different incidence angles of LY-12 aluminium target. The results show that the characteristic mono-energetic X-ray can be exploited to simulate the blow-off impulse of the blackbody X-ray under certain conditions as a feasible equivalent method for the equal-flux and equal-impulse relations between mono-energetic and intense pulse blackbody of blow-off impulse. Moreover, the equivalent thermodynamic effect can be achieved between the point source radiation and parallel X-ray of X-ray. Furthermore, the cosine distribution of blow-off impulse is conducive to designing and calculating X-ray radiation load of hard aluminium corresponding to 1–5 keV blackbody spectrum. The mentioned results can be referenced for pulse X-ray simulation source and enhance the fidelity of the thermal-mechanical effect by electron beam. It is noteworthy that the study on the thermodynamic effects of intense pulsed X-ray is of high significance.

The Evaluation of TiTe2 as a Diffusion Barrier in the Formation of Low Thermal Conductivity Nanolaminates with Bi2Te3 and Sb2Te3

2010 ◽  
Vol 74 ◽  
pp. 38-47
Author(s):  
Clay Mortensen ◽  
Paul Zschack ◽  
David C. Johnson
Keyword(s):  
Thermal Conductivity ◽  
Diffusion Barrier ◽  
Self Assembly ◽  
Low Temperatures ◽  
Annealing Temperature ◽  
The Self ◽  
High Angle ◽  
X Ray Diffraction ◽  
Amorphous Precursor ◽  
X Ray

The evolution of designed [(Ti-Te)]x[(Sb-Te)]y, [(Bi-Te)]x[(Sb-Te)]y, [(Ti-Te)]w[(Bi-Te)]x[(Sb-Te)]y and [(Ti-Te)]w[(Bi-Te)]x[(Ti-Te)]y[(Sb-Te)]z precursors were followed as a function of annealing temperature and time using both low and high angle x-ray diffraction techniques to probe the self assembly into nanolaminate materials. The [(Bi-Te)]x[(Sb-Te)]y precursors were found to interdiffuse at low temperatures to form a (BixSb1-x)2Te3 alloy. The [(Ti-Te)]x[(Bi-Te)]y and [(Ti-Te)]x[(Sb-Te)]y precursors formed ordered nanolaminates [{(TiTe2)}1.35]x[Bi2Te3]y and [{(TiTe2)}1.35]x[Sb2Te3]y respectively. The [(Ti-Te)]w[(Bi-Te)]x[(Sb-Te)]x precursors formed [{(TiTe2)}1.35]w[(Bi0.5Sb0.5)2Te3]2x nanolaminates on annealing, as the bismuth and antimony layers interdiffused. Over the range of TiTe2 thicknesses used in [(Ti-Te)]w[(Bi-Te)]x[(Ti-Te)]y[(Sb-Te)]z precursors, Bi and Sb were found to interdiffuse through the 2-4 nm thick Ti-Te layers, resulting in the formation of (BixSb1-x)2Te3 alloy layers as part of the final nanolaminated products. When the Bi-Te and Sb-Te thicknesses were equal in the amorphous precursors, symmetric [{(TiTe2)}1.35]m[(Bi0.5Sb0.5)2Te3]n nanolamiantes were formed. When the thicknesses of Bi-Te and Sb-Te layers were not equal in the amorphous precursor, asymmetric [(TiTe2)1.35]m[(BixSb1-x)2Te3]n[(TiTe2)1.35]m[(BixSb1-x)2Te3]p nanolaminates were formed. These results imply that to form (A)w(B)x(C)y nanolaminates using designed layered precursors all three components must be immiscible. To form (A)x(B)y(A)x(C)z nanolaminates, the components must be immiscible or the precursor to the A component and the A component itself must be an effective interdiffusion barrier preventing B and C from mixing.

On the self-condensation of aminoguanidine leading to 1,1,4,10,10-pentaamino-2,3,5,6,8,9-hexaazadeca-1,3,5,7,9-pentaene (structure elucidation through X-ray powder diffraction)

Tetrahedron ◽  
2014 ◽  
Vol 70 (43) ◽  
pp. 8056-8061 ◽  
Author(s):  
Bruno Tasso ◽  
Gerolamo Pirisino ◽  
Federica Novelli ◽  
Davide Garzon ◽  
Roberta Fruttero ◽  
...  
Keyword(s):  
Powder Diffraction ◽  
Structure Elucidation ◽  
The Self ◽  
X Ray

Effects of X‐Ray Irradiation on the Self‐Friction of Potassium Chloride

1966 ◽  
Vol 37 (12) ◽  
pp. 4358-4363
Author(s):  
G. H. Jirgal ◽  
Earl F. Zwicker
Keyword(s):  
Potassium Chloride ◽  
The Self ◽  
X Ray

Small Angle X-ray Scattering-Based Elucidation of the Self-Association Mechanism of Human Insulin Analogue LysB29(Nεω-carboxyheptadecanoyl) des(B30)

Biochemistry ◽  
2013 ◽  
Vol 52 (2) ◽  
pp. 282-294 ◽  
Author(s):  
Malene Hillerup Jensen ◽  
Per-Olof Wahlund ◽  
Katrine Nørgaard Toft ◽  
Jes Kristian Jacobsen ◽  
Dorte Bjerre Steensgaard ◽  
...  
Keyword(s):  
Human Insulin ◽  
Small Angle ◽  
Insulin Analogue ◽  
The Self ◽  
X Ray ◽  
X Ray Scattering ◽  
Self Association ◽  
Ray Scattering

Mössbauer and x-ray study of the self-induced magnetostatic distortion of TbxY1−xFe2 Laves phases

1975 ◽  
Author(s):  
R. S. Preston ◽  
A. E. Dwight ◽  
A. J. Fedro ◽  
C. W. Kimball
Keyword(s):  
The Self ◽  
Laves Phases ◽  
X Ray

In Situ X-ray Diffraction Measurements of the Self-Preservation Effect of CH4Hydrate

2001 ◽  
Vol 105 (42) ◽  
pp. 9756-9759 ◽  
Author(s):  
Satoshi Takeya ◽  
Wataru Shimada ◽  
Yasushi Kamata ◽  
Takao Ebinuma ◽  
Tsutomu Uchida ◽  
...  
Keyword(s):  
The Self ◽  
X Ray Diffraction ◽  
X Ray

A Study of Fe-Based Composite Coating Fabricated by the Self-Propagating High Temperature Synthesis

2012 ◽  
Vol 626 ◽  
pp. 138-142
Author(s):  
Saowanee Singsarothai ◽  
Vishnu Rachpech ◽  
Sutham Niyomwas
Keyword(s):  
High Temperature ◽  
Composite Coating ◽  
Steel Substrate ◽  
The Self ◽  
X Ray Diffraction ◽  
Temperature Synthesis ◽  
X Ray ◽  
High Temperature Synthesis ◽  
Precursor Powders ◽  
Scanning Electron

The steel substrate was coated by Fe-based composite using self-propagating high-temperature synthesis (SHS) reaction of reactant coating paste. The green paste was prepared by mixing precursor powders of Al, Fe2O3and Al2O3. It was coated on the steel substrate before igniting by oxy-acetylene flame. The effect of coating paste thickness and the additives on the resulted Fe-based composite coating was studied. The composite coating was characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM) couple with dispersive X-ray (EDS).

Hydrothermal Syntheses, Crystal Structures, and Luminescent Properties of Two MnII Coordination Polymers: From Two-Fold Interpenetrated pcu Topological Net to Polycatenated 2D+2D→3D Framework

2015 ◽  
Vol 68 (2) ◽  
pp. 322 ◽  
Author(s):  
Wenlong Liu ◽  
Mengqiang Wu ◽  
Xueying Wang ◽  
Wei Wang ◽  
Dayu Liu ◽  
...  
Keyword(s):  
Dicarboxylic Acid ◽  
Coordination Polymers ◽  
Self Assembly ◽  
Room Temperature ◽  
Luminescent Properties ◽  
The Self ◽  
X Ray Diffraction ◽  
X Ray ◽  
3D Framework ◽  
Dimethyl Benzene

Using a hydrothermal synthesis, the self-assembly of MnII ions and 1,4-bis(1-imidazol-yl)-2,5-dimethyl benzene with two dicarboxylate ligands, 2-nitrobenzene-1,4-dicarboxylic acid (2-H2ata) and 5-methylbenzene-1,3-dicarboxylic acid (5-CH3-H2ip) constructed two interesting coordination polymers: [Mn(2-ata)(bimb)]n (1) and {[Mn(5-CH3-ip)(bimb)1.5]·2H2O}n (2), where bimb refers to 1,4-bis(1-imidazol-yl)-2,5-dimethyl benzene. Their structures were determined by single-crystal X-ray diffraction, elemental analysis, and infrared spectroscopy. Complex 1 exhibits a 2-fold interpenetrated pcu net. Complex 2 shows an unusual polycatenated 2D+2D→3D framework. In addition, the solid-state photoluminescent properties of 1 and 2 were investigated at room temperature.

The self-weight deformation of an x-ray interferometer

Metrologia ◽  
2011 ◽  
Vol 48 (2) ◽  
pp. S50-S54 ◽  
Author(s):  
L Ferroglio ◽  
G Mana ◽  
E Massa
Keyword(s):  
The Self ◽  
X Ray

Synthesis, Structure and Magnetic Characterization of a New Phosphate K1.84Fe1.42Nb0.58(PO4)3 with the Langbeinite- type Structure

2008 ◽  
Vol 63 (3) ◽  
pp. 345-348 ◽  
Author(s):  
Artem A. Babaryk ◽  
Igor V. Zatovsky ◽  
Nikolay S. Slobodyanik ◽  
Ivan V. Ogorodnyk
Keyword(s):  
Crystal Structure ◽  
Low Temperatures ◽  
Structure Type ◽  
The Self ◽  
Magnetic Characterization ◽  
X Ray ◽  
Complex Phosphate ◽  
Cubic System ◽  
The Relationship

A new complex phosphate K1.84Fe1.42Nb0.58(PO4)3 has been synthesized by the self-flux technique. The X-ray single crystal structure and magnetic properties were studied. The compound crystallizes in the cubic system with space group P213 (a = 9.9404(10) Å ) and belongs to the langbeinite structure type. The structure contains [M2P3O18] building units. “Closed” fragments [M8P9O60] provide space for location of two potassium atoms. Antiferromagnetic interactions were detected at low temperatures which originate from superexchange through a M(1)-O-P-O-M(2) pathway with corresponding J = −5.5(1) cm−1. The relationship between the UV/vis absorption and the structure is discussed.

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