Investigation of the Effect of Implantation of Aluminum Alloys by Gas and Metal Ions on the Structure and Phase Composition of the Implanted Layer

2021 ◽  
Vol 887 ◽  
pp. 235-241
Author(s):  
Viktor V. Ovchinnikov ◽  
Irina A. Kurbatova ◽  
Elena Vladimirovna Luk'yanenko
Keyword(s):  
Phase Composition ◽  
Aluminum Alloys ◽  
Radiation Dose ◽  
Cellular Structure ◽  
Ion Current ◽  
Subgrain Structure ◽  
Entire Volume ◽  
Average Width ◽  
Cladding Layer ◽  
Ion Current Density

The article presents studies of the structure and phase composition of aluminum alloys after ion implantation. It is shown that the effect of accelerated ions (Cu + Pb) (E = 30 keV, j = 100 μA / cm2) on an alloy without a cladding layer already at a dose of 1016 cm - 2 leads to the formation of a developed subgrain structure in the initially deformed alloy. With an increase in the ion current density and radiation dose, the cellular structure of the implanted aluminum alloys becomes more regular - well-formed cells are observed practically throughout the entire volume of the sample under study. The average width of the dislocation-free regions reaches 2.5 μm with the width of the boundaries not exceeding 0.6 μm.

scholarly journals Steady oxide film obtaining on surface of piston aluminum alloys at micro-arc oxidation

2018 ◽  
Vol 2018 (5) ◽  
pp. 19-26
Author(s):  
Максим Скрябин ◽  
Maxim Skryabin
Keyword(s):  
High Temperature ◽  
Aluminum Alloys ◽  
Oxide Film ◽  
Ion Current ◽  
Properties Of Coatings ◽  
Surface Strengthening ◽  
Thin Oxide Films ◽  
Micro Arc Oxidation ◽  
The Impact ◽  
Ion Current Density

The formation of thin oxide films on piston aluminum alloys through the method of micro-arc oxidation is considered. The mechanism of the formation crystal inclusions and high-temperature structures depending on ion current density in time is described. One of the methods of surface strengthening piston aluminum alloys – micro-arc oxidation is described and analyzed. The mechanisms of oxide layers formation taking into account the impact of alloy elements of piston aluminum alloys are considered. The analysis of porous cells is carried out, basic properties of coatings are investigated.

Radiation-induced change of polyimide properties under high-fluence and high ion current density implantation

2004 ◽  
Vol 78 (7) ◽  
pp. 1067-1072 ◽  
Author(s):  
V.N. Popok ◽  
I.I. Azarko ◽  
R.I. Khaibullin ◽  
A.L. Stepanov ◽  
V. Hnatowicz ◽  
...  
Keyword(s):  
Current Density ◽  
Ion Current ◽  
High Fluence ◽  
Radiation Induced ◽  
Ion Current Density

scholarly journals Far-Field Plume Characterization of a 100-W Class Hall Thruster

Aerospace ◽  
2020 ◽  
Vol 7 (5) ◽  
pp. 58
Author(s):  
Thibault Hallouin ◽  
Stéphane Mazouffre
Keyword(s):  
Energy Distribution ◽  
Current Density ◽  
Low Voltage ◽  
Ion Current ◽  
Hall Thruster ◽  
Far Field ◽  
Ion Energy ◽  
Ion Energy Distribution ◽  
The Core ◽  
Ion Current Density

The 100 W-class ISCT100-v2 Hall Thruster (HT) has been characterized in terms of far-field plume properties. By means of a Faraday Cup and a Retarding Potential Analyzer, both the ion current density and the ion energy distribution function have been measured over a 180 ∘ circular arc for different operating points. Measurements are compared to far-field plume characterizations performed with higher power Hall thrusters. The ion current density profiles remain unchanged whatever the HT input power, although an asymptotic limit is observed in the core of the plume at high discharge voltages and anode mass flow rates. In like manner, the ion energy distribution functions reveal that most of the beam energy is concentrated in the core of the plume [ − 40 ∘ ; 40 ∘ ] . Moreover, the fraction of low energy ion populations increases at large angles, owing to charge exchange and elastic collisions. Distinct plume regions are identified; they remain similar to the one described for high-power HTs. An efficiency analysis is also performed in terms of current utilization, mass utilization, and voltage utilization. The anode efficiency appears to be essentially affected by a low voltage utilization, the latter originating from the large surface-to-volume ratio inherent to low-power HTs. Experimental results also show that the background pressure clearly affects the plume structure and content.

Impact Factors in Measurements of Ion-Current Density Produced by High-Voltage DC Wire's Corona

2013 ◽  
Vol 28 (3) ◽  
pp. 1414-1422 ◽  
Author(s):  
Chao Fang ◽  
Xiang Cui ◽  
Xiangxian Zhou ◽  
Tiebing Lu ◽  
Yongzan Zhen ◽  
...  
Keyword(s):  
High Voltage ◽  
Current Density ◽  
Ion Current ◽  
Impact Factors ◽  
Ion Current Density

Changing of the Structural-Phase State and Mechanical Properties of VT-23 Titanium Alloy under Surface Treatment by Intense Flux of Copper Ions

2015 ◽  
Vol 1085 ◽  
pp. 284-288 ◽  
Author(s):  
Viktor Sergeev ◽  
Mark P. Kalashnikov ◽  
Vasilii V. Neufeld
Keyword(s):  
Mechanical Properties ◽  
Titanium Alloy ◽  
Phase State ◽  
Copper Ions ◽  
Structural Phase ◽  
Ion Current ◽  
High Flux ◽  
Structural Phase State ◽  
Ion Treatment ◽  
Ion Current Density

Results of surface modification of the VT-23 titanium alloy by high flux of copper ions with an energy of 2 keV and ion current density of 3.5 mA/cm2 was studied. The dependence of the microhardness and penetration depth of ion as function of duration of ion treatment was determined. Structural-phase state of ion-modified of the VT-23 titanium samples surface layer was investigated by TEM and SEM. Microhardness was researched by nanoindentation method.

scholarly journals WSN-Based Measurement of Ion-Current Density Under High-Voltage Direct Current Transmission Lines

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 10947-10955 ◽  
Author(s):  
Yong Cui ◽  
Xiao Song ◽  
Luxing Zhao ◽  
Haiwen Yuan ◽  
Guifang Wu ◽  
...  
Keyword(s):  
High Voltage ◽  
Direct Current ◽  
Current Density ◽  
Transmission Lines ◽  
Ion Current ◽  
High Voltage Direct Current ◽  
Current Transmission ◽  
Ion Current Density

A Study on Structure and Phase Composition of Cellular Ceramic Materials from Dispersed Silica-Rich Rocks

2018 ◽  
Vol 284 ◽  
pp. 893-898
Author(s):  
Andrey Yu. Stolboushkin ◽  
A.I. Ivanov ◽  
O.A. Fomina
Keyword(s):  
Phase Composition ◽  
Cellular Structure ◽  
Solid Phase ◽  
Foam Glass ◽  
Physical And Mechanical Properties ◽  
Ceramic Materials ◽  
Average Density ◽  
Crystalline Material ◽  
Pore Glass ◽  
Cellular Ceramic

Studies on structure, phase composition and properties of ceramic wall materials with a glass-crystalline framework from dispersed silica-rich rocks are described. The results of chemical, mineralogical and granulometric compositions of tripolite and granulated foam-glass crystalline material (GFGCM) are presented. The dependence of physical and mechanical properties of cellular ceramic materials on GFGCM content in the composition in the amount from 5 to 75% is determined. Test samples of cellular ceramic materials with dimensions 250 × 120 × 65 mm, having a compressive strength 16.2-20.8 MPa, water absorption 7.1-7.9 % and an average density 0.99-1.32 g/m3 were produced at the factory. At the macroscale level the cellular structure of the ceramic material consists of closed pores with a vitrified inner surface pore, glass-crystalline outer shell of the pores and solid phase of the framework walls. It was established that after firing in the temperature range 850-900 °C the walls of the framework are represented by quartz, feldspar and hematite, a pronounced halo is indicating a significant amount of glass phase.

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