Features OfInelastic and Elastic Characteristics of Si and SiO2/Si Structures

Онанко, А. П.; Kuryliuk, Vasyl; Onanko, Y. A.; Kuryliuk, A. N.; Charnyi, D. V.; Dmytrenko, О. P.; Kulish, M. P.; Pinchuk-Rugal, Т. М.

doi:10.21272/jnep.13(5).05017

Cited by 3 publications

(2 citation statements)

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“…To measure the temperature dependences of IF Q −1 (Т) and elastic modulus E(T), resonance vibrations at frequency f ≈ 2 kHz and the methods of a complete piezoelectric oscillator at frequency f ≈ 117 kHz and during alternative deformation ε ≈ 10 −6 in vacuum P ≈ 10 −3 Pa were used. The measurement error of IF determination was ΔQ −1 /Q −1 ≈ 10%, and the relative change in the elastic modulus was ΔE/E ≈ 0.1% [17][18][19][20][21].…”

Section: Methodsmentioning

confidence: 98%

Indicatory surface of anelastic-elastic properties of Ti alloys

Onanko,

Kuzmych,

Onanko

et al. 2023

Mater. Res. Express

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The simultaneous influence of hydrogen H and ultrasound deformation on internal friction Q −1 and dynamic elastic modulus E of intermetallic Ti3Al alloy after cutting and polishing were studied. The relaxation maximum of internal friction Q −1 M1 at temperature Т М1 ≈ 398 К, conditioned by the mechanism caused by reorientation interstitial atoms in dumbbell configurations H-H was discovered. Internal friction maximum Q −1 M2 in intermetallic Ti3Al at temperature T M2 ≈ 439 K was discovered with an activation energy H 2 = 0.86±0.1 eV. 2D and 3D atomic force microscopy microstructure images of Ti (VT8) alloy after mechanical and thermal treatment are presented. Strengthening of Ti alloys is related to the cooperation of dislocations with point defects.

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Section: Methodsmentioning

confidence: 98%

Indicatory surface of anelastic-elastic properties of Ti alloys

Onanko,

Kuzmych,

Onanko

et al. 2023

Mater. Res. Express

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“…Methods.-Ultrasonic pulse-phase method using "USMV-LETI" (Ultrasonic Measurement Velocity-Leningrad Electrotechnical Institute), modernized "USMV-KNU" (Ultrasonic Measurement Velocity-Kyiv National University) and computerized ultrasound velocity measurement device "KERN-4" with frequencies f ║ ≈ 1 MHz and f ┴ ≈ 0.7 MHz. 18,19 The measurement error of the ultrasound velocity was…”

Section: Methodsmentioning

confidence: 99%

Anelastic Internal Friction and Mechanical Spectroscopy of SiO₂/Si Wafers

Onanko,

Kuzmych,

Onanko

et al. 2024

ECS J. Solid State Sci. Technol.

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In this work, after electron irradiation and X-ray, the outcomes of the evaluation dynamic characteristics of interstitial atoms Sij , vacancy V, and O-complexes were evaluated to account for the annealing conditions to derive specific structural defects in the SiO2/Si wafer. A non-destructive method, which allows the determination of the internal friction difference ΔQ-1/Q-1 0 of the elastic vibration of structural defects of dislocations with density ND and the depth of the broken layer hb , is offered for the SiO2/Si wafer. The method was developed, the installation was designed and manufactured for the excitation and registration of damped bending resonant oscillations in a SiO2/Si disc-shaped wafer with a thickness hSiO2 ≈ 100 nm, his = 300÷500×103 nm, and diameter D = 60÷100×10-3 m to measure the structurally sensitive internal friction Q-1 in vacuum P ≈ 10-2 Pa. Measurement of the internal friction background Q-1 0 at harmonic frequencies f0 and f2 allowed us to experimentally determine the nodal lines of the oscillating disks.

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Kinetic Model of the Initial Stage of the Process of Colloid Retention by the Pore Space of Sokyrnite

Onanko,

Onanko

2023

LRaWM

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The physicochemical phenomena occurring on the surface of sokyrnite grains in complex system "medium grain surface - dispersion medium - surface of suspended particles" have been studied. The framework structure of the sokyrnite structure (rough surface, presence of pores and channels, entrance windows) enables it to work as a "molecular sieve" and to be a highly efficient sorbent-ion exchanger. The porosity of the filter media was determined. Namely: the porosity of the media grains (also called the internal porosity) and the porosity of the intergranular space (media layer). The internal surface area, which is an important quality parameter for sokyrnite as a physical adsorbent, was determined. Several other properties associated with sokyrnite and retained colloidal particles, which affect the strength of the physical adsorption, were investigated. The relationships characterizing the parameters of the zeolite filter media layer were formulated and given. In these studies, the requirements for determining the filter charging time and the optimal technological and design parameters of the filter, according to the operating conditions at a specific water treatment facility, were considered. They determined the need for more detailed research and development of a kinetic model for the initial stage of filtering an aqueous suspension through a filter containing zeolite media. A differential material balance expression for the zeolite filter was formulated. Based on the developed kinetic model, comparative experiments on iron removal from underground natural waters using the above-mentioned filter material were planned and carried out. The mechanism of the distribution of iron ions in the filter space due to the phenomenon of diffusion, in accordance with Fick's first law, is given. The mechanism of iron flake retention by the zeolite media pore space, the consolidation of which occurs during the transition of iron from a divalent to trivalent form, is described. The factors that interfere with autocatalytic processes in iron sediments were described. The dynamics of changes in the concentration of iron in the filtrate after the end of the ion-exchange resource of sokyrnite were studied.

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Features OfInelastic and Elastic Characteristics of Si and SiO2/Si Structures

Cited by 3 publications

References 2 publications

Indicatory surface of anelastic-elastic properties of Ti alloys

Indicatory surface of anelastic-elastic properties of Ti alloys

Anelastic Internal Friction and Mechanical Spectroscopy of SiO₂/Si Wafers

Kinetic Model of the Initial Stage of the Process of Colloid Retention by the Pore Space of Sokyrnite

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Features OfInelastic and Elastic Characteristics of Si and SiO2/Si Structures

Cited by 3 publications

References 2 publications

Indicatory surface of anelastic-elastic properties of Ti alloys

Indicatory surface of anelastic-elastic properties of Ti alloys

Anelastic Internal Friction and Mechanical Spectroscopy of SiO2/Si Wafers

Kinetic Model of the Initial Stage of the Process of Colloid Retention by the Pore Space of Sokyrnite

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Anelastic Internal Friction and Mechanical Spectroscopy of SiO₂/Si Wafers