Influence of the filler-matrix interface on ageing by γ-radiation of ATH filled EPDM

2013 ◽  
pp. 69-74 ◽  
Keyword(s):  
Matrix Interface ◽  
Γ Radiation

0513 Effect of γ radiation on physicochemical properties, protein-protein interaction, and microstructure of whey proteins

2016 ◽  
Vol 94 (suppl_5) ◽  
pp. 246-246
Author(s):  
M. Guo ◽  
X. Wang ◽  
F. Lee ◽  
J. Lv ◽  
D. Zhang
Keyword(s):  
Physicochemical Properties ◽  
Protein Interaction ◽  
Whey Proteins ◽  
Γ Radiation ◽  
Protein Protein Interaction

Applications of Monte Carlo Simulation for Analyzing γ-Radiation Characteristics of Radioactive Cloud Radiation in NPP Emissions

2018 ◽  
Vol 12 (3) ◽  
pp. 7-16
Author(s):  
A.I. Ksenofontov ◽  
A.P. Elokhin ◽  
E.A. Alalem
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Radiation Characteristics ◽  
Γ Radiation ◽  
Radioactive Cloud

The use of high-resolution methods of research in the design of the diamond-matrix interface to increase the durability of the diamond tool

2020 ◽  
Vol 86 (6) ◽  
pp. 62-71
Author(s):  
P. P. Sharin ◽  
S. P. Yakovleva ◽  
M. P. Akimova ◽  
V. I. Popov
Keyword(s):  
High Resolution ◽  
Diamond Tool ◽  
Diamond Surface ◽  
Matrix Interface ◽  
Reaction Products ◽  
Diamond Tools ◽  
Functional Composites ◽  
Mechanical Adhesion ◽  
Carbide Matrix ◽  
Diamond Retention

The results of studying fundamental and applied problems regarding the formation of boundary layers between diamond and carbide matrix are presented with the goal to develop a highly resistant diamond tool. The new approaches to the synthesis of diamond-carbide materials combining diamond metallization and sintering in a single-stage technology are presented. The developed technology eliminates the re-heating of a metallized coatings which results in their destruction and enhanced graphitization of diamond (these phenomena restrict using metallization procedure to improve diamond retention and synthesis of high-functional composites for diamond tools). The goal of the study is analysis the structural and phase state of the «diamond – carbide matrix» interface in a diamond tool obtained by the new technology and the main factors determining the level of diamond retention in the presence of a metallized coating. Unique opportunities provided by modern high-resolution methods of research were used in the study. The elemental composition and morphological features of the diamond-matrix interface were studied using the methods of scanning electron microscopy, atomic force microscopy, X-ray microanalysis and Raman spectroscopy. Identification of the reaction products, including non-diamond carbon was performed. It is shown that the introduction of the powder-metallizer significantly modified the contact boundaries and provide conditions for improving the chemical and mechanical adhesion of the diamond-matrix system. The formation of the well-developed nano- and sub-microscale roughness of the diamond surface and dense filling of the existing voids with nanoscale layers of metal-infiltrate was revealed. The multilevel organization of highly structured elements of the transition zone with the minimal graphitization ensured the monolithic character and strength of the diamond-matrix bond. Comparative service tests of preproduction and control samples of diamond dressers proved the efficiency of developed hybrid technology (the specific performance of diamond tools increased by 39 – 45%). New fundamental and applied results have been obtained in the field of studying interface zones in crystalline multiphase systems that can be used to regulate adhesion phenomena at the interphase boundaries and develop highly efficient composite materials.

Investigation by a Genetic Algorithm of the Effect of Moisture Diffusion on the Fiber Matrix Interface Damage of Graphite/Epoxy Nanocomposite

2015 ◽  
Vol 8 (3) ◽  
pp. 253-259 ◽  
Author(s):  
Mohamed Alami ◽  
Allel Mokaddem ◽  
Bendouma Doumi ◽  
Nadir Beldjoudi ◽  
Ahmed Boutaous
Keyword(s):  
Genetic Algorithm ◽  
Moisture Diffusion ◽  
Matrix Interface ◽  
Epoxy Nanocomposite ◽  
Interface Damage ◽  
Fiber Matrix Interface ◽  
Fiber Matrix ◽  
Effect Of Moisture

Radiation Effects on Hollandite Ceramics developed for Radioactive Cesium Immobilization

2003 ◽  
Vol 792 ◽  
Author(s):  
V. Aubin ◽  
D. Caurant ◽  
D. Gourier ◽  
N. Baffier ◽  
S. Esnouf ◽  
...  
Keyword(s):  
Radiation Effects ◽  
Liquid Waste ◽  
Fission Products ◽  
Radioactive Cesium ◽  
Radioactive Liquid Waste ◽  
Epr Spectrum ◽  
Paramagnetic Resonance ◽  
Γ Radiation ◽  
The Stability ◽  
High Level

ABSTRACTProgress on separating the long-lived fission products from the high level radioactive liquid waste (HLW) has led to the development of specific host matrices, notably for the immobilization of cesium. Hollandite (nominally BaAl2Ti6O16), one of the main phases constituting Synroc, receives renewed interest as specific Cs-host wasteform. The radioactive cesium isotopes consist of short-lived Cs and Cs of high activities and Cs with long lifetime, all decaying according to Cs+→Ba2++e- (β) + γ. Therefore, Cs-host forms must be both heat and (β,γ)-radiation resistant. The purpose of this study is to estimate the stability of single phase hollandite under external β and γ radiation, simulating the decay of Cs. A hollandite ceramic of simple composition (Ba1.16Al2.32Ti5.68O16) was essentially irradiated by 1 and 2.5 MeV electrons with different fluences to simulate the β particles emitted by cesium. The generation of point defects was then followed by Electron Paramagnetic Resonance (EPR). All these electron irradiations generated defects of the same nature (oxygen centers and Ti3+ ions) but in different proportions varying with electron energy and fluence. The annealing of irradiated samples lead to the disappearance of the latter defects but gave rise to two other types of defects (aggregates of light elements and titanyl ions). It is necessary to heat at relatively high temperature (T=800°C) to recover an EPR spectrum similar to that of the pristine material. The stability of hollandite phase under radioactive cesium irradiation during the waste storage is discussed.

Ratio of incoherent and coherent scattering intensities of X‐ray and γ‐radiation

2021 ◽  
Author(s):  
Gely Veniaminovich Pavlinsky
Keyword(s):  
Coherent Scattering ◽  
Γ Radiation ◽  
X Ray
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