Investigation of the Microstructure and Mechanical Properties of Si-Al-N Transparent Coatings

2016 ◽  
Vol 683 ◽  
pp. 262-268 ◽  
Author(s):  
Irina A. Bozhko ◽  
Evgeniya V. Rybalko ◽  
Marina V. Fedorishcheva ◽  
Yury A. Vorobiev ◽  
Rais M. Magzhanov ◽  
...  
Keyword(s):  
Optical Transmission ◽  
Phase State ◽  
Elastic Recovery ◽  
Structural Phase ◽  
Nanocomposite Coatings ◽  
Internal Stresses ◽  
Reactive Magnetron ◽  
Structural Phase State ◽  
X Ray ◽  
Transparent Coatings

Nanocomposite coatings on the basis of Si-Al-N with different ratios of Al and Si concentrations were prepared using the reactive magnetron sputtering method. Internal stresses and structural-phase state of the two types of coatings was examined by X-ray analysis. The microhardness was measured by nanoindentation method. The microhardness, the elastic modulus and the coefficient of elastic recovery were determined. The optical transmission was measured for all types of samples.

Structural Phase State and Mechanical Properties of the Si-Al-N Coatings with Different Concentration Ratio of Al and Si

2015 ◽  
Vol 1085 ◽  
pp. 289-293 ◽  
Author(s):  
Viktor Sergeev ◽  
Marina V. Fedorischeva ◽  
Mark P. Kalashnikov ◽  
Irina A. Bozhko ◽  
Andrey V. Voronov ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Concentration Ratio ◽  
Phase State ◽  
Elastic Recovery ◽  
Structural Phase ◽  
Nanocomposite Coatings ◽  
Reactive Magnetron ◽  
Recovery Coefficient ◽  
Structural Phase State ◽  
X Ray

The amorphous and nanocomposite coatings on the basis of Si-Al-N with different ratios of Al and Si concentrations were prepared by reactive magnetron sputtering method. Structural-phase state of coatings on the basis of Si-Al-N was investigated by TEM, SEM and X-ray analysis. Microhardness, modulus of elasticity, elastic recovery coefficient was determined by nanoindentation method.

Effect of Aluminum Content on the Performance of Coatings Based on Al-Si-N

2016 ◽  
Vol 685 ◽  
pp. 591-595
Author(s):  
Irina A. Bozhko ◽  
Evgeniya V. Rybalko ◽  
Mark P. Kalashnikov ◽  
Marina V. Fedorishcheva ◽  
Victor P. Sergeev
Keyword(s):  
Optical Transmission ◽  
Aluminum Content ◽  
Phase State ◽  
Elastic Recovery ◽  
Structural Phase ◽  
Structural Phase State ◽  
X Ray ◽  
Al Content ◽  
Transparent Coatings ◽  
High Al Content

The transparent coatings on the basis of Al- Si- N system with high Al content and the opaque Al-Si-N with a low Al content were prepared by impulse magnetron sputtering method. Structural-phase state of the two types of coatings was examined by X-ray analysis. The microhardness was measured by nanoindentation method. The microhardness, the elastic modulus and the coefficient of elastic recovery were determined. Also the optical transmission was measured for all types of samples.

scholarly journals Structural-Phase State, Mechanical Properties, Acoustic and Magnetic Characteristics in the Sustainable Deformation Localization Zones of Power Equipment Made of Structural and Heat Resistant Steels

Metals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1638
Author(s):  
Nikolay Ababkov ◽  
Alexandr Smirnov ◽  
Vladimir Danilov ◽  
Lev Zuev ◽  
Natalya Popova ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Phase State ◽  
Structural Phase ◽  
Magnetic Characteristics ◽  
Internal Stresses ◽  
Power Equipment ◽  
Deformation Localization ◽  
Structural Phase State ◽  
Heat Resistant ◽  
Heat Resistant Steels

The paper presents the results of the analysis of the microstructure, mechanical properties, acoustic and magnetic characteristics of the metal of pipelines that are part of heat and power equipment, after long-term operation, made of structural and heat-resistant steels in the zones of localization of plastic deformation. Samples of 0.2 С steel and 0.12С-1Сr-1Mo-1V steel were studied in the initial state, as well as after operation for 219 and 360 thousand hours, respectively. As a result of the studies carried out for each sample, the phase composition was determined (qualitatively and quantitatively), and the following parameters of the fine structure were calculated: volume fractions of structural components of steel (pearlite and ferrite), scalar and excess ± dislocation density, curvature-torsion of the crystal lattice χ, amplitude of internal stresses (shear stress and long-range stresses). All quantitative parameters of the structure are determined both in each structural component of steel, and in general for each sample. The structure of the metal of all specimens after deformation before the formation of zones of stable localization of deformations consists of a ferrite-pearlite mixture, and for specimens after operation before fracture only of unfragmented and fragmented ferrite. Ferrite, which occupies the bulk of the material, is present both unfragmented and fragmented. For all samples, the ratios ≥ , χ = χpl, σL ≥ σd were calculated, which indicate whether there is a danger of the initiation of microcracks in metal samples. For specimens without operation and after operation without damage in zones of stable localization of deformations, these conditions are met, and for specimens after operation until destruction, they are not met. It was found that the structural-phase state in the zones of localization of deformations has a direct effect on the characteristics of non-destructive tests. Thus, for all investigated samples, the values of such parameters as the delay time of the surface acoustic wave, the attenuation coefficient, the amplitude of the received signal, and the intensity of magnetic noise in the zones of deformation localization were established.

Structural Phase State of the Ceramic Layer of ZrO2

2015 ◽  
Vol 1085 ◽  
pp. 303-306
Author(s):  
Oleg S. Tolkachev ◽  
Yuriy Ivanov ◽  
Аnatoly Klopotov ◽  
Vladimir Klopotov ◽  
Yuriy Abzaev
Keyword(s):  
Thermodynamic Analysis ◽  
Phase Formation ◽  
Phase State ◽  
Structural Phase ◽  
Ceramic Layer ◽  
Initial Material ◽  
Structural Phase State ◽  
X Ray

The results of the X-ray phase and thermodynamic analysis of phase formation in the Zr-Y-O system which is the initial material for formation of yttrium of stabilized ceramics on the basis of dioxide of zirconium are presented. It is established that the material is multiphase and contains monoclinic, cubic and tetragonal modifications of dioxide of zirconium which weight ratios differ considerably.

Electron-Beam Welding - Structural-Phase State and Microhardnes in the Weld Zone in a Submicrocrystalline Titanium Alloy Grade2

2017 ◽  
Vol 906 ◽  
pp. 32-37 ◽  
Author(s):  
Vasilii A. Klimenov ◽  
Anatolii A. Klopotov ◽  
Yu.A. Abzaev ◽  
K.A. Kurgan ◽  
Yu.A. Vlasov
Keyword(s):  
Titanium Alloy ◽  
Heat Affected Zone ◽  
Phase State ◽  
Electron Beam Welding ◽  
Structural Phase ◽  
Weld Zone ◽  
X Ray Diffraction ◽  
Structural Phase State ◽  
X Ray ◽  
Microhardness Distribution

The paper presents the results of the X-ray diffraction analysis of structural-phase states in the weld zone of a titanium alloy Grade2 in micro-and submicrocrystalline states. It is established that the structural-phase state in the weld zone and in the heat-affected zone depends on the state of samples of the alloy Grade2 before welding. It is shown that formation process of metastable phases ω-Ti and α′′-Ti occurs in the submicrocrystalline state in the alloy Grade2 in the weld zone and in the heat-affected zone. Investigations of the features of the microhardness distribution in the weld zone in alloys Grade2 in micro-and submicrocrystalline states are carried out. Different character of microhardness distributions in the weld zone in the samples depending on the structural-phase state of welded plates made of alloy Grade2 is determined.

Features of the Structural-Phase State of the Diamond-Matrix Boundary Zone in Diamond-Containing Composite Materials

2019 ◽  
Vol 945 ◽  
pp. 756-762
Author(s):  
P.P. Sharin ◽  
M.P. Akimova ◽  
S.P. Yakovleva
Keyword(s):  
Phase State ◽  
Structural Phase ◽  
Cemented Carbide ◽  
Specific Productivity ◽  
Matrix Composites ◽  
Structural Phase State ◽  
X Ray ◽  
Hybrid Technology ◽  
Metallized Coating ◽  
Diamond Retention

Preliminary metallization of the diamond component, which promotes the formation of chemical bonds on the diamond-matrix contact during subsequent sintering, is used to increase the strength of diamond retention and the durability of diamond-containing metal matrix composites. There are restrictions on carrying out metallization to create diamond composites with a cemented carbide matrix, since reheating the metallized coating at high sintering temperatures of carbide powders leads to its destruction, diamond graphitization and deterioration of the material properties. The structural-phase state in the diamond-matrix contact zone has been studied and the main factors providing the strength of diamond retention in diamond-cemented carbide composites obtained by hybrid technology that excludes the reheating of the metallized coating have been revealed. It was revealed, that the developed hybrid technology combining the thermal diffusion metallization of diamond and sintering according to the self-dosed impregnation scheme in one cycle ensures the production and preservation of the metallized coating by the methods of scanning electron microscopy, X-ray diffraction and X-ray phase analysis, Raman spectroscopy. Comparative tests have been carried out and it is shown that the specific productivity of experimental samples of a diamond tool (ruling pencils) with a metallized diamond component is on 39% higher than same parameter of pencils without metallization.

Yttrium effect on the structural-phase state in situ of Mo – 15.3 V – 10.5 Si composite

2020 ◽  
pp. 19-28
Author(s):  
A. V. Larionov ◽  
◽  
K. V. Pikulin ◽  
S. V. Zhidovinova ◽  
L. Yu. Udoeva ◽  
...  
Keyword(s):  
Solid Solution ◽  
Phase State ◽  
Structural Phase ◽  
Volume Ratio ◽  
Metallic Phase ◽  
Homogeneity Region ◽  
Structural Phase State ◽  
X Ray ◽  
Quaternary Compounds ◽  
Nonequilibrium Crystallization

The effect of yttrium on the structural-phase state of the Mo – 15.3 V – 10.5 Si hypereutectic alloy has been investigated using X-ray phase analysis and scanning electron microscopy with energy-dispersive X-ray analysis. It has been established that the main phases of Mo – (14.3 – 15.4) V – (9.8 – 10.6) Si – (0.3 – 5.3) Y alloys obtained under nonequilibrium crystallization are the metal solid solution (Mo1 – xVx)ss-matrix, silicide solid solution (Mo1 – xVx)3Si and silicide Y5Si3. In alloys doped with yttrium up to 1.0 at. %, the space between the dendrites of the (Mo1 – xVx)ss metal phase is filled with (Mo1 – xVx)3Si solid solution, and Y5Si3 is located at the boundaries of the metal solid solution. At a concentration of yttrium in alloys above 3.0 at. % the space between (Mo1 – xVx)ss dendrites is filled with Y5Si3 silicide, inside which (Mo1 – xVx)3Si grains are formed. Triple or quaternary compounds containing yttrium were not detected. Elemental composition of alloy phases of the Mo – (14.3 – 15.4) V – (9.8 – 10.6) Si – (0.3 – 5.3) Y alloys is almost identical and is characterized by non-stoichiometry with respect to silicon. According to well-known literature data, the silicon contents in the (Mo1 – xVx)ss and (Mo1 – xVx)3Si phases are within the acceptable limits of the homogeneity region, and the silicon concentration in Y5Si3 (≈ 35.4 at.%) is beyond the established limits. Doping of the Mo – 15.3 V – 10.5 Si alloy with yttrium increases the dispersion of the structure. Particles of the main structural components become close in size. Wherein the volume ratio of the metallic phase to the silicide with increasing yttrium content in the alloys increases. The density of alloys varies between 8.7 – 9.0 g/cm3.

Influence of composition on the structural-phase state, electrophysical and magnetotransport properties of alloy thin films based on Co and Cu

Vacuum ◽  
2021 ◽  
Vol 187 ◽  
pp. 110141
Author(s):  
I.O. Shpetnyi ◽  
I.Yu Protsenko ◽  
S.I. Vorobiov ◽  
V.I. Grebinaha ◽  
L. Satrapinskyy ◽  
...  
Keyword(s):  
Thin Films ◽  
Phase State ◽  
Structural Phase ◽  
Structural Phase State
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