11 research outputs found
ΠΠΎΠΌΠΏΠΎΠ·ΠΈΡΠΈΠΎΠ½Π½ΡΠ΅ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Ρ ΡΠΈΡΡΠ΅ΠΌΡ ΡΠΏΠΎΠΊΡΠΈΠ΄Π½Π°Ρ ΡΠΌΠΎΠ»Π°βW Π΄Π»Ρ ΡΠ°Π΄ΠΈΠ°ΡΠΈΠΎΠ½Π½ΠΎΠΉ Π·Π°ΡΠΈΡΡ ΠΎΡ Π³Π°ΠΌΠΌΠ°-ΠΈΠ·Π»ΡΡΠ΅Π½ΠΈΡ
Π‘omposite materials based on the epoxy resinβW system with varying W content (0β80 %) were obtained using the method of chemical curing. Microstructural investigations of the samples showed that with increasing W content there is a more uniform distribution of grains in the epoxy resin matrix could be observed. Agglomeration of W grains is noted for samples with filler content up to 40 %. Statistical analysis of the grain size of the initial W powder revealed that the probable diameter of W grains is 475 nm. The values of effective and relative densities of the experimental samples were obtained using the Archimedes method. The effective density varied from 1.16 to 4.36 g/cm3 with W powder content rising. The relative density values received ranged from 91 to 94 %, indica ting that there were no significant defects in the samples. X-ray diffraction analysis showed the presence of vcc-W and WO2 phases, indicating the oxidation of W in the thin surface layer of the powder. Calculation in Phy-X/PSD software allowed to evaluate the gamma radiation shielding efficiency for the epoxy resinβW system composite materials in 0.8β2.5 MeV energy range. It was observed that samples with filler content of 60 and 80 % were the most suitable for radiation shielding. It was found that the addition of W powder to the epoxy matrix contributed to the reduction of half attenuation layer values by 3.5 times from 9.448 to 2.672 cm for samples with 0 and 80 % W content, respectively, for 1.25 MeV radiation energy. The obtained results demonstrate the high efficiency of the proposed composite materials for shielding gamma radiation, which makes them a perspective candidate for manufacturing radiation shields.Π‘ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΠΌΠ΅ΡΠΎΠ΄Π° Ρ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΎΡΠ²Π΅ΡΠΆΠ΄Π΅Π½ΠΈΡ ΠΏΠΎΠ»ΡΡΠ΅Π½Ρ ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡΠΈΠΎΠ½Π½ΡΠ΅ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Ρ Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΡΠΈΡΡΠ΅ΠΌΡ ΡΠΏΠΎΠΊΡΠΈΠ΄Π½Π°Ρ ΡΠΌΠΎΠ»Π°βW Ρ Π²Π°ΡΡΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΡΠΎΠ΄Π΅ΡΠΆΠ°Π½ΠΈΡ W ΠΎΡ 0 Π΄ΠΎ 80 %. ΠΡΠΎΠ²Π΅Π΄Π΅Π½Π½ΠΎΠ΅ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠ΅ ΠΌΠΈΠΊΡΠΎΡΡΡΡΠΊΡΡΡΡ ΠΎΠ±ΡΠ°Π·ΡΠΎΠ² ΠΏΠΎΠΊΠ°Π·Π°Π»ΠΎ, ΡΡΠΎ ΠΏΡΠΈ ΡΠ²Π΅Π»ΠΈΡΠ΅Π½ΠΈΠΈ ΡΠΎΠ΄Π΅ΡΠΆΠ°Π½ΠΈΡ W Π½Π°Π±Π»ΡΠ΄Π°Π΅ΡΡΡ Π±ΠΎΠ»Π΅Π΅ ΡΠ°Π²Π½ΠΎΠΌΠ΅ΡΠ½ΠΎΠ΅ ΡΠ°ΡΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΠ΅ Π·Π΅ΡΠ΅Π½ Π² ΠΌΠ°ΡΡΠΈΡΠ΅ ΡΠΏΠΎΠΊΡΠΈΠ΄Π½ΠΎΠΉ ΡΠΌΠΎΠ»Ρ. ΠΠ»Ρ ΠΎΠ±ΡΠ°Π·ΡΠΎΠ² Ρ ΡΠΎΠ΄Π΅ΡΠΆΠ°Π½ΠΈΠ΅ΠΌ Π½Π°ΠΏΠΎΠ»Π½ΠΈΡΠ΅Π»Ρ Π΄ΠΎ 40 % ΠΎΡΠΌΠ΅ΡΠ΅Π½Π° Π°Π³Π»ΠΎΠΌΠ΅ΡΠ°ΡΠΈΡ Π·Π΅ΡΠ΅Π½ W. Π‘ΡΠ°ΡΠΈΡΡΠΈΡΠ΅ΡΠΊΠΈΠΉ Π°Π½Π°Π»ΠΈΠ· ΡΠ°Π·ΠΌΠ΅ΡΠΎΠ² Π·Π΅ΡΠ΅Π½ ΠΈΡΡ
ΠΎΠ΄Π½ΠΎΠ³ΠΎ ΠΏΠΎΡΠΎΡΠΊΠ° W Π²ΡΡΠ²ΠΈΠ», ΡΡΠΎ Π²Π΅ΡΠΎΡΡΠ½ΡΠΉ ΠΈΡ
Π΄ΠΈΠ°ΠΌΠ΅ΡΡ ΡΠΎΡΡΠ°Π²Π»ΡΠ΅Ρ 475 Π½ΠΌ. ΠΠΎΠ»ΡΡΠ΅Π½Ρ Π·Π½Π°ΡΠ΅Π½ΠΈΡ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΠΉ ΠΈ ΠΎΡΠ½ΠΎΡΠΈΡΠ΅Π»ΡΠ½ΠΎΠΉ ΠΏΠ»ΠΎΡΠ½ΠΎΡΡΠ΅ΠΉ ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΡΡ
ΠΎΠ±ΡΠ°Π·ΡΠΎΠ² Ρ ΠΏΠΎΠΌΠΎΡΡΡ ΠΌΠ΅ΡΠΎΠ΄Π° ΠΡΡ
ΠΈΠΌΠ΅Π΄Π°. ΠΡΡΠ΅ΠΊΡΠΈΠ²Π½Π°Ρ ΠΏΠ»ΠΎΡΠ½ΠΎΡΡΡ ΠΈΠ·ΠΌΠ΅Π½ΡΠ»Π°ΡΡ Π² ΠΏΡΠ΅Π΄Π΅Π»Π°Ρ
ΠΎΡ 1,16 Π΄ΠΎ 4,36 Π³/ΡΠΌ3 Ρ ΡΠ²Π΅Π»ΠΈΡΠ΅Π½ΠΈΠ΅ΠΌ ΡΠΎΠ΄Π΅ΡΠΆΠ°Π½ΠΈΡ ΠΏΠΎΡΠΎΡΠΊΠ° W. ΠΠ½Π°ΡΠ΅Π½ΠΈΡ ΠΎΡΠ½ΠΎΡΠΈΡΠ΅Π»ΡΠ½ΠΎΠΉ ΠΏΠ»ΠΎΡΠ½ΠΎΡΡΠΈ Π²Π°ΡΡΠΈΡΠΎΠ²Π°Π»ΠΈΡΡ ΠΎΡ 91 Π΄ΠΎ 94 %, ΡΡΠΎ ΡΠ²ΠΈΠ΄Π΅ΡΠ΅Π»ΡΡΡΠ²ΠΎΠ²Π°Π»ΠΎ ΠΎΠ± ΠΎΡΡΡΡΡΡΠ²ΠΈΠΈ ΡΡΡΠ΅ΡΡΠ²Π΅Π½Π½ΡΡ
Π΄Π΅ΡΠ΅ΠΊΡΠΎΠ² ΠΏΡΠΈ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½ΠΈΠΈ ΠΈΡΠΏΡΡΠ°Π½ΠΈΡ. Π Π΅Π½ΡΠ³Π΅Π½ΠΎΡΡΡΡΠΊΡΡΡΠ½ΡΠΉ Π°Π½Π°Π»ΠΈΠ· ΠΏΠΎΠΊΠ°Π·Π°Π» Π½Π°Π»ΠΈΡΠΈΠ΅ ΡΠ°Π· ΠΠ¦Π-W ΠΈ WO2, ΡΡΠΎ ΡΠΊΠ°Π·ΡΠ²Π°Π΅Ρ Π½Π° ΠΎΠΊΠΈΡΠ»Π΅Π½ΠΈΠ΅ W Π² ΡΠΎΠ½ΠΊΠΎΠΌ ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠ½ΠΎΠΌ ΡΠ»ΠΎΠ΅ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Π°. ΠΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ Π² ΠΏΡΠΎΠ³ΡΠ°ΠΌΠΌΠ½ΠΎΠΌ ΠΎΠ±Π΅ΡΠΏΠ΅ΡΠ΅Π½ΠΈΠΈ Phy-X/PSD ΠΏΠΎΠ·Π²ΠΎΠ»ΠΈΠ»ΠΎ ΠΎΡΠ΅Π½ΠΈΡΡ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ ΡΠΊΡΠ°Π½ΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΠΎΡ Π³Π°ΠΌΠΌΠ°-ΠΈΠ·Π»ΡΡΠ΅Π½ΠΈΡ ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡΠΈΠΎΠ½Π½ΡΡ
ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΠΎΠ² ΠΏΡΠΈ ΡΠ½Π΅ΡΠ³ΠΈΠΈ ΠΈΠ·Π»ΡΡΠ΅Π½ΠΈΡ Π² Π΄ΠΈΠ°ΠΏΠ°Π·ΠΎΠ½Π΅ 0,8β2,5 ΠΡΠ. ΠΠ±ΡΠ°Π·ΡΡ Ρ ΡΠΎΠ΄Π΅ΡΠΆΠ°Π½ΠΈΠ΅ΠΌ Π½Π°ΠΏΠΎΠ»Π½ΠΈΡΠ΅Π»Ρ 60 ΠΈ 80 % ΠΎΠΊΠ°Π·Π°Π»ΠΈΡΡ Π½Π°ΠΈΠ±ΠΎΠ»Π΅Π΅ ΠΏΠΎΠ΄Ρ
ΠΎΠ΄ΡΡΠΈΠΌΠΈ Π΄Π»Ρ ΡΠΎΠ·Π΄Π°Π½ΠΈΡ ΡΠΊΡΠ°Π½ΠΎΠ² ΡΠ°Π΄ΠΈΠ°ΡΠΈΠΎΠ½Π½ΠΎΠΉ Π·Π°ΡΠΈΡΡ. ΠΠ±Π½Π°ΡΡΠΆΠ΅Π½ΠΎ, ΡΡΠΎ Π΄ΠΎΠ±Π°Π²Π»Π΅Π½ΠΈΠ΅ ΠΏΠΎΡΠΎΡΠΊΠ° W Π² ΡΠΏΠΎΠΊΡΠΈΠ΄Π½ΡΡ ΠΌΠ°ΡΡΠΈΡΡ ΡΠΏΠΎΡΠΎΠ±ΡΡΠ²ΠΎΠ²Π°Π»ΠΎ ΡΠΌΠ΅Π½ΡΡΠ΅Π½ΠΈΡ Π·Π½Π°ΡΠ΅Π½ΠΈΠΉ ΡΠ»ΠΎΡ ΠΏΠΎΠ»ΠΎΠ²ΠΈΠ½Π½ΠΎΠ³ΠΎ ΠΎΡΠ»Π°Π±Π»Π΅Π½ΠΈΡ Π² 3,5 ΡΠ°Π·Π° Ρ 9,448 Π΄ΠΎ 2,672 ΡΠΌ Π΄Π»Ρ ΠΎΠ±ΡΠ°Π·ΡΠΎΠ² Ρ ΡΠΎΠ΄Π΅ΡΠΆΠ°Π½ΠΈΠ΅ΠΌ W 0 ΠΈ 80 % ΡΠΎΠΎΡΠ²Π΅ΡΡΡΠ²Π΅Π½Π½ΠΎ ΠΏΡΠΈ ΡΠ½Π΅ΡΠ³ΠΈΠΈ ΠΈΠ·Π»ΡΡΠ΅Π½ΠΈΡ Π³Π°ΠΌΠΌΠ°-ΠΊΠ²Π°Π½ΡΠΎΠ² 1,25 ΠΡΠ. ΠΠΎΠ»ΡΡΠ΅Π½Π½ΡΠ΅ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ Π΄Π΅ΠΌΠΎΠ½ΡΡΡΠΈΡΡΡΡ Π²ΡΡΠΎΠΊΡΡ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ ΠΏΡΠ΅Π΄Π»ΠΎΠΆΠ΅Π½Π½ΡΡ
ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡΠΈΠΎΠ½Π½ΡΡ
ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΠΎΠ² Π² ΡΠΊΡΠ°Π½ΠΈΡΠΎΠ²Π°Π½ΠΈΠΈ Π³Π°ΠΌΠΌΠ°-ΠΈΠ·Π»ΡΡΠ΅Π½ΠΈΡ, ΡΡΠΎ Π΄Π΅Π»Π°Π΅Ρ ΠΈΡ
Π΄ΠΎΡΡΠΎΠΉΠ½ΡΠΌ Π²Π°ΡΠΈΠ°Π½ΡΠΎΠΌ Π΄Π»Ρ ΡΠΎΠ·Π΄Π°Π½ΠΈΡ ΡΠΊΡΠ°Π½ΠΎΠ² ΡΠ°Π΄ΠΈΠ°ΡΠΈΠΎΠ½Π½ΠΎΠΉ Π·Π°ΡΠΈΡΡ
ΠΠ»Π°ΡΡΠΈΡΠΈΠΊΠ°ΡΠΈΡ Π°ΡΡΠ΅ΡΠΈΠ°Π»ΡΠ½ΠΎΠΉ ΡΡΠ΅Π½ΠΊΠΈ ΠΏΠΎΠ΄ Π΄Π΅ΠΉΡΡΠ²ΠΈΠ΅ΠΌ Π²ΡΡΠΎΠΊΠΎΠΈΠ½ΡΠ΅Π½ΡΠΈΠ²Π½ΠΎΠ³ΠΎ Π½ΠΈΠ·ΠΊΠΎΡΠ°ΡΡΠΎΡΠ½ΠΎΠ³ΠΎ ΡΠ»ΡΡΡΠ°Π·Π²ΡΠΊΠ°
A significant increase in the elasticity of the femoropopliteal artery segments in vitro was found as a result of the action of cavitation generated by powerful low-frequency (24β26 kHz) ultrasound introduced into the vessel by a flexible waveguide. The vessel elasticity was evaluated both by the deflection under the action of an external force and by the degree of its expansion vasodilatation by the internal pressure created by the expanding balloon. The possibility of achieving a more than two-fold decrease in the vascular wall elasticity modulus after 30-s exposure to an ultrasound intensity of 31 W/cm2 wasΒ shown. It has been established that at the 10 ΞΌm amplitude of ultrasonic vibrations, vascular wall damage occurs in the form of small foci of detachment and rupture of the intima accompanied by delamination in the media layer, when polymorphic slit-like cavities are formed with an increase in the amplitude of oscillations above 23 ΞΌm.Π£ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ ΡΡΡΠ΅ΡΡΠ²Π΅Π½Π½ΠΎΠ΅ ΠΏΠΎΠ²ΡΡΠ΅Π½ΠΈΠ΅ ΡΠ»Π°ΡΡΠΈΡΠ½ΠΎΡΡΠΈ Π±Π΅Π΄ΡΠ΅Π½Π½ΠΎ-ΠΏΠΎΠ΄ΠΊΠΎΠ»Π΅Π½Π½ΡΡ
ΡΠ΅Π³ΠΌΠ΅Π½ΡΠΎΠ² Π°ΡΡΠ΅ΡΠΈΠΉ in vitro Π² ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠ΅ Π΄Π΅ΠΉΡΡΠ²ΠΈΡ ΠΊΠ°Π²ΠΈΡΠ°ΡΠΈΠΈ, Π³Π΅Π½Π΅ΡΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠΉ ΠΌΠΎΡΠ½ΡΠΌ Π½ΠΈΠ·ΠΊΠΎΡΠ°ΡΡΠΎΡΠ½ΡΠΌ (24β26 ΠΊΠΡ) ΡΠ»ΡΡΡΠ°Π·Π²ΡΠΊΠΎΠΌ, Π²Π²ΠΎΠ΄ΠΈΠΌΡΠΌ Π²Π½ΡΡΡΡ ΠΊΡΠΎΠ²Π΅Π½ΠΎΡΠ½ΠΎΠ³ΠΎ ΡΠΎΡΡΠ΄Π° Π³ΠΈΠ±ΠΊΠΈΠΌ Π²ΠΎΠ»Π½ΠΎΠ²ΠΎΠ΄ΠΎΠΌ. ΠΠ»Π°ΡΡΠΈΡΠ½ΠΎΡΡΡ ΡΠΎΡΡΠ΄Π° ΠΎΡΠ΅Π½ΠΈΠ²Π°Π»Π°ΡΡ ΠΊΠ°ΠΊ ΠΏΠΎ ΠΏΡΠΎΠ³ΠΈΠ±Ρ ΠΏΠΎΠ΄ Π΄Π΅ΠΉΡΡΠ²ΠΈΠ΅ΠΌ Π²Π½Π΅ΡΠ½Π΅ΠΉ ΡΠΈΠ»Ρ, ΡΠ°ΠΊ ΠΈ ΠΏΠΎ ΡΡΠ΅ΠΏΠ΅Π½ΠΈ Π΅Π³ΠΎ Π²Π°Π·ΠΎΠ΄ΠΈΠ»Π°ΡΠ°ΡΠΈΠΈ Π²Π½ΡΡΡΠ΅Π½Π½ΠΈΠΌ Π΄Π°Π²Π»Π΅Π½ΠΈΠ΅ΠΌ, ΡΠΎΠ·Π΄Π°Π²Π°Π΅ΠΌΡΠΌ ΡΠ°ΡΡΠΈΡΡΡΡΠΈΠΌΡΡ Π±Π°Π»Π»ΠΎΠ½ΠΎΠΌ. ΠΠΎΠΊΠ°Π·Π°Π½Π° Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡΡ Π΄ΠΎΡΡΠΈΠΆΠ΅Π½ΠΈΡ Π±ΠΎΠ»Π΅Π΅ ΡΠ΅ΠΌ Π΄Π²ΡΠΊΡΠ°ΡΠ½ΠΎΠ³ΠΎ ΡΠ½ΠΈΠΆΠ΅Π½ΠΈΡ ΠΌΠΎΠ΄ΡΠ»Ρ ΡΠΏΡΡΠ³ΠΎΡΡΠΈ ΡΠΎΡΡΠ΄ΠΈΡΡΠΎΠΉ ΡΡΠ΅Π½ΠΊΠΈ ΠΏΠΎΡΠ»Π΅ 30 Ρ ΡΠ»ΡΡΡΠ°Π·Π²ΡΠΊΠΎΠ²ΠΎΠ³ΠΎ Π²ΠΎΠ·Π΄Π΅ΠΉΡΡΠ²ΠΈΡ ΠΈΠ½ΡΠ΅Π½ΡΠΈΠ²Π½ΠΎΡΡΡΡ 31 ΠΡ/ΡΠΌ2. Π£ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ, ΡΡΠΎ ΠΏΡΠΈ Π°ΠΌΠΏΠ»ΠΈΡΡΠ΄Π΅ ΡΠ»ΡΡΡΠ°Π·Π²ΡΠΊΠΎΠ²ΡΡ
ΠΊΠΎΠ»Π΅Π±Π°Π½ΠΈΠΉ 10 ΠΌΠΊΠΌ ΠΈΠΌΠ΅Π΅Ρ ΠΌΠ΅ΡΡΠΎ ΠΏΠΎΠ²ΡΠ΅ΠΆΠ΄Π΅Π½ΠΈΠ΅ ΡΠΎΡΡΠ΄ΠΈΡΡΠΎΠΉ ΡΡΠ΅Π½ΠΊΠΈ Π² Π²ΠΈΠ΄Π΅ ΠΌΠ΅Π»ΠΊΠΈΡ
ΡΠΎΠΊΡΡΠΎΠ² ΠΎΡΡΠ»ΠΎΠ΅Π½ΠΈΡ ΠΈ ΡΠ°Π·ΡΡΠ²Π° ΠΈΠ½ΡΠΈΠΌΡ, ΡΠΎΠΏΡΠΎΠ²ΠΎΠΆΠ΄Π°ΡΡΠ΅Π΅ΡΡ ΡΠ°ΡΡΠ»ΠΎΠ΅Π½ΠΈΡΠΌΠΈ Π² ΠΌΠ΅Π΄ΠΈΠΈ Ρ ΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΠΏΠΎΠ»ΠΈΠΌΠΎΡΡΠ½ΡΡ
ΡΠ΅Π»Π΅Π²ΠΈΠ΄Π½ΡΡ
ΠΏΠΎΠ»ΠΎΡΡΠ΅ΠΉ ΠΏΡΠΈ ΡΠ²Π΅Π»ΠΈΡΠ΅Π½ΠΈΠΈ Π°ΠΌΠΏΠ»ΠΈΡΡΠ΄Ρ ΠΊΠΎΠ»Π΅Π±Π°Π½ΠΈΠΉ ΡΠ²ΡΡΠ΅ 23 ΠΌΠΊΠΌ
Selenopheno[3,2-C]- and [2,3-C]Coumarins: Synthesis, Cytotoxicity, Angiogenesis Inhibition,and Antioxidant Properties
A simple method for the synthesis of substituted selenopheno[2,3-c] and -[3,2-c]coumarins by treatment of the corresponding ethynylcoumarins with in situ prepared selenium(IV) bromide in 1,4-dioxane-water was elaborated. Molecular structures for selected derivatives were confirmed by X-ray diffraction measurements. The cytotoxic activity of novel selenophenocoumarins showed higher activity and lower acute toxicity than sodium selenite on various tumor cell lines as well as an ability for inhibiting matrix metalloproteinases (MMP-1 β MMP-14), angiogenesis on matrigel in vitro and in vivo. The compounds exhibit antioxidant and prooxidant properties
ΠΠΎΠ²ΡΠ΅ ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡΠΈΠΎΠ½Π½ΡΠ΅ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Ρ Π΄Π»Ρ Π·Π°ΡΠΈΡΡ ΠΎΡ Π³Π°ΠΌΠΌΠ°-ΠΈΠ·Π»ΡΡΠ΅Π½ΠΈΡ
A new composite material of WβBi2O3 system is proposed as a protection against ionizing radiation. An improved method of hot isostatic pressing for the preparation of composite materials is proposed. The duration of sintering under conditions of high pressure and temperature was 3 minutes. The study of the morphology and chemical composition of WβBi2O3 composites was carried out using scanning electron microscopy and X-ray energy-dispersive spectroscopy respectively. The density evaluation of the obtained materials was carried out using the Archimedesβ method. The densest samples were obtained at a pressure of 5 GPa and temperatures of 25 and 500 Β°C, the density of which was 18.10 and 17.85 g/cm3, respectively. It is shown that exposure to high temperatures during sintering adversely affects both the microstructure and density of the samples due to the redox reaction accompanied by the reduction of Bi and the oxidation of W. The results of studying the WβBi2O3 structure by X-ray diffraction analysis showed that all samples include the main body-centered phase W, and the presence of the WO2 phase is noted only when the sintering temperature is increased to 850 Β°C, which is confirmed by the appearance of reflections 111 and 22-2. Shielding effectiveness of the WβBi2O3 composite materials from gamma radiation using the Phy-X/PSD software was evaluated. Co60 with an energy of 0.826β2.506 MeV was used as a source of gamma quanta. The simulation results were compared with the calculations for Pb and Bi. Key parameters such as linear attenuation coefficient, mean free path and half value layer are determined. The calculation results showed that the WβBi2O3 composite surpasses Pb and Bi in its shielding properties, which makes it promising for use as a radiation shielding material.Π ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ Π·Π°ΡΠΈΡΡ ΠΎΡ ΠΈΠΎΠ½ΠΈΠ·ΠΈΡΡΡΡΠ΅Π³ΠΎ ΠΈΠ·Π»ΡΡΠ΅Π½ΠΈΡ ΠΏΡΠ΅Π΄Π»ΠΎΠΆΠ΅Π½ Π½ΠΎΠ²ΡΠΉ ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡΠΈΠΎΠ½Π½ΡΠΉ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π» ΡΠΈΡΡΠ΅ΠΌΡ WβBi2O3. ΠΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½Π° ΡΡΠΎΠ²Π΅ΡΡΠ΅Π½ΡΡΠ²ΠΎΠ²Π°Π½Π½Π°Ρ ΠΌΠ΅ΡΠΎΠ΄ΠΈΠΊΠ° Π³ΠΎΡΡΡΠ΅Π³ΠΎ ΠΈΠ·ΠΎΡΡΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΏΡΠ΅ΡΡΠΎΠ²Π°Π½ΠΈΡ Π΄Π»Ρ ΠΏΠΎΠ»ΡΡΠ΅Π½ΠΈΡ ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡΠΈΠΎΠ½Π½ΡΡ
ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΠΎΠ². ΠΠ»ΠΈΡΠ΅Π»ΡΠ½ΠΎΡΡΡ ΡΠΏΠ΅ΠΊΠ°Π½ΠΈΡ Π² ΡΡΠ»ΠΎΠ²ΠΈΡΡ
Π²ΡΡΠΎΠΊΠΎΠ³ΠΎ Π΄Π°Π²Π»Π΅Π½ΠΈΡ ΠΈ ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΡ ΡΠΎΡΡΠ°Π²ΠΈΠ»Π° 3 ΠΌΠΈΠ½. ΠΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠ΅ ΠΌΠΈΠΊΡΠΎΡΡΡΡΠΊΡΡΡΡ ΠΈ Ρ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠΎΡΡΠ°Π²Π° ΠΎΠ±ΡΠ°Π·ΡΠΎΠ² ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡΠΎΠ² WβBi2O3 ΠΏΡΠΎΠ²ΠΎΠ΄ΠΈΠ»ΠΈ Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΡΠΊΠ°Π½ΠΈΡΡΡΡΠ΅ΠΉ ΡΠ»Π΅ΠΊΡΡΠΎΠ½Π½ΠΎΠΉ ΠΌΠΈΠΊΡΠΎΡΠΊΠΎΠΏΠΈΠΈ ΠΈ ΡΠ΅Π½ΡΠ³Π΅Π½ΠΎΠ²ΡΠΊΠΎΠΉ ΡΠ½Π΅ΡΠ³ΠΎΠ΄ΠΈΡΠΏΠ΅ΡΡΠΈΠΎΠ½Π½ΠΎΠΉ ΡΠΏΠ΅ΠΊΡΡΠΎΡΠΊΠΎΠΏΠΈΠΈ ΡΠΎΠΎΡΠ²Π΅ΡΡΡΠ²Π΅Π½Π½ΠΎ. ΠΡΠ΅Π½ΠΊΡ ΠΏΠ»ΠΎΡΠ½ΠΎΡΡΠΈ ΠΏΠΎΠ»ΡΡΠ΅Π½Π½ΡΡ
ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΠΎΠ² ΠΎΡΡΡΠ΅ΡΡΠ²Π»ΡΠ»ΠΈ Ρ ΠΏΠΎΠΌΠΎΡΡΡ ΠΌΠ΅ΡΠΎΠ΄Π° ΠΡΡ
ΠΈΠΌΠ΅Π΄Π°. ΠΠ°ΠΈΠ±ΠΎΠ»Π΅Π΅ ΠΏΠ»ΠΎΡΠ½ΡΠΌΠΈ ΠΎΠΊΠ°Π·Π°Π»ΠΈΡΡ ΠΎΠ±ΡΠ°Π·ΡΡ, ΠΏΠΎΠ»ΡΡΠ΅Π½Π½ΡΠ΅ ΠΏΡΠΈ Π΄Π°Π²Π»Π΅Π½ΠΈΠΈ 5 ΠΠΠ° ΠΈ ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΠ°Ρ
25 ΠΈ 500 Β°C, ΠΏΠ»ΠΎΡΠ½ΠΎΡΡΡ ΠΊΠΎΡΠΎΡΡΡ
ΡΠΎΡΡΠ°Π²ΠΈΠ»Π° 18,10 ΠΈ 17,85 Π³/ΡΠΌ3 ΡΠΎΠΎΡΠ²Π΅ΡΡΡΠ²Π΅Π½Π½ΠΎ. Π£ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ, ΡΡΠΎ Π²ΠΎΠ·Π΄Π΅ΠΉΡΡΠ²ΠΈΠ΅ Π²ΡΡΠΎΠΊΠΈΡ
ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡ Π² ΠΏΡΠΎΡΠ΅ΡΡΠ΅ ΡΠΏΠ΅ΠΊΠ°Π½ΠΈΡ Π½Π΅Π³Π°ΡΠΈΠ²Π½ΠΎ ΡΠΊΠ°Π·ΡΠ²Π°Π΅ΡΡΡ ΠΊΠ°ΠΊ Π½Π° ΠΌΠΈΠΊΡΠΎΡΡΡΡΠΊΡΡΡΠ΅, ΡΠ°ΠΊ ΠΈ Π½Π° ΠΏΠ»ΠΎΡΠ½ΠΎΡΡΠΈ ΠΎΠ±ΡΠ°Π·ΡΠΎΠ² ΠΈΠ·-Π·Π° ΠΏΡΠΎΡΠ΅ΠΊΠ°Π½ΠΈΡ ΠΎΠΊΠΈΡΠ»ΠΈΡΠ΅Π»ΡΠ½ΠΎ-Π²ΠΎΡΡΡΠ°Π½ΠΎΠ²ΠΈΡΠ΅Π»ΡΠ½ΠΎΠΉ ΡΠ΅Π°ΠΊΡΠΈΠΈ, ΡΠΎΠΏΡΠΎΠ²ΠΎΠΆΠ΄Π°ΡΡΠ΅ΠΉΡΡ Π²ΠΎΡΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΈΠ΅ΠΌ Bi ΠΈ ΠΎΠΊΠΈΡΠ»Π΅Π½ΠΈΠ΅ΠΌ W. Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΡΡΡΡΠΊΡΡΡΡ ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡΠΈΠΎΠ½Π½ΡΡ
ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΠΎΠ² ΡΠΈΡΡΠ΅ΠΌΡ WβBi2O3 ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ ΡΠ΅Π½ΡΠ³Π΅Π½ΠΎΡΡΡΡΠΊΡΡΡΠ½ΠΎΠ³ΠΎ Π°Π½Π°Π»ΠΈΠ·Π° ΠΏΠΎΠΊΠ°Π·Π°Π»ΠΈ, ΡΡΠΎ Π²ΡΠ΅ ΠΎΠ±ΡΠ°Π·ΡΡ Π²ΠΊΠ»ΡΡΠ°ΡΡ ΠΎΡΠ½ΠΎΠ²Π½ΡΡ ΠΎΠ±ΡΠ΅ΠΌΠ½ΠΎ-ΡΠ΅Π½ΡΡΠΈΡΠΎΠ²Π°Π½Π½ΡΡ ΡΠ°Π·Ρ W, Π° Π½Π°Π»ΠΈΡΠΈΠ΅ ΡΠ°Π·Ρ WO2 ΠΎΡΠΌΠ΅ΡΠ°Π΅ΡΡΡ Π»ΠΈΡΡ ΠΏΡΠΈ ΡΠ²Π΅Π»ΠΈΡΠ΅Π½ΠΈΠΈ ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΡ ΡΠΈΠ½ΡΠ΅Π·Π° Π΄ΠΎ 850 Β°Π‘, ΡΡΠΎ ΠΏΠΎΠ΄ΡΠ²Π΅ΡΠΆΠ΄Π°Π΅ΡΡΡ Π²ΠΎΠ·Π½ΠΈΠΊΠ½ΠΎΠ²Π΅Π½ΠΈΠ΅ΠΌ ΡΠ΅ΡΠ»Π΅ΠΊΡΠΎΠ² 111 ΠΈ 22-2. ΠΡΠΎΠ²Π΅Π΄Π΅Π½ΠΎ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠ΅ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ ΡΠΊΡΠ°Π½ΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡΠΈΠΎΠ½Π½ΡΡ
ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΠΎΠ² ΠΎΡ Π³Π°ΠΌΠΌΠ°-ΠΈΠ·Π»ΡΡΠ΅Π½ΠΈΡ Ρ ΠΏΠΎΠΌΠΎΡΡΡ ΠΏΡΠΎΠ³ΡΠ°ΠΌΠΌΠ½ΠΎΠ³ΠΎ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠ° Phy-X/PSD. Π ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ ΠΈΡΡΠΎΡΠ½ΠΈΠΊΠ° Π³Π°ΠΌΠΌΠ°-ΠΊΠ²Π°Π½ΡΠΎΠ² ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π»ΠΈ Co60 Ρ ΡΠ½Π΅ΡΠ³ΠΈΠ΅ΠΉ 0,826β2,506 ΠΡΠ. Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ ΠΌΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΡ Π±ΡΠ»ΠΈ ΡΡΠ°Π²Π½Π΅Π½Ρ Ρ ΡΠ°ΡΡΠ΅ΡΠ°ΠΌΠΈ Π΄Π»Ρ Pb ΠΈ Bi. ΠΠΏΡΠ΅Π΄Π΅Π»Π΅Π½Ρ ΠΎΡΠ½ΠΎΠ²Π½ΡΠ΅ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΡ: Π»ΠΈΠ½Π΅ΠΉΠ½ΡΠΉ ΠΊΠΎΡΡΡΠΈΡΠΈΠ΅Π½Ρ ΠΎΡΠ»Π°Π±Π»Π΅Π½ΠΈΡ, Π΄Π»ΠΈΠ½Π° ΡΠ²ΠΎΠ±ΠΎΠ΄Π½ΠΎΠ³ΠΎ ΠΏΡΠΎΠ±Π΅Π³Π° ΠΈ ΡΠ»ΠΎΠΉ ΠΏΠΎΠ»ΠΎΠ²ΠΈΠ½Π½ΠΎΠ³ΠΎ ΠΎΡΠ»Π°Π±Π»Π΅Π½ΠΈΡ. Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ ΡΠ°ΡΡΠ΅ΡΠ° ΠΏΠΎΠΊΠ°Π·Π°Π»ΠΈ, ΡΡΠΎ ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡ ΡΠΈΡΡΠ΅ΠΌΡ WβBi2O3 ΠΏΠΎ ΡΠ²ΠΎΠΈΠΌ ΡΠΊΡΠ°Π½ΠΈΡΡΡΡΠΈΠΌ ΡΠ²ΠΎΠΉΡΡΠ²Π°ΠΌ ΠΏΡΠ΅Π²ΠΎΡΡ
ΠΎΠ΄ΠΈΡ Pb ΠΈ Bi, ΡΡΠΎ Π΄Π΅Π»Π°Π΅Ρ Π΅Π³ΠΎ ΠΏΠ΅ΡΡΠΏΠ΅ΠΊΡΠΈΠ²Π½ΡΠΌ Π΄Π»Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΡ Π² ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Π° ΡΠ°Π΄ΠΈΠ°ΡΠΈΠΎΠ½Π½ΠΎΠΉ Π·Π°ΡΠΈΡΡ