73 research outputs found
Possibility to study eta-mesic nuclei and photoproduction of slow eta-mesons at the GRAAL facility
A new experiment is proposed with the aim to study eta-mesic nuclei and
low-energy interactions of eta with nuclei. Two decay modes of eta produced by
a photon beam inside a nucleus will be observed, namely a collisional decay
\eta N \to \pi N inside the nucleus and the radiative decay \eta \to \gamma
\gamma outside. In addition, a collisional decay of stopped S_{11}(1535)
resonance inside the nucleus, S_{11}(1535) N \to N N, will be studied. The
experiment can be performed using the tagged photon beam at ESRF with the
end-point energy 1000 MeV and the GRAAL detector which includes a
high-resolution BGO calorimeter and a large acceptance lead-scintillator
time-of-flight wall. Some results of simulation and estimates of yields are
given.Comment: 20 pages, 19 figure
Measurement of Time Resolution of Scintillation Detectors with EQR-15 Silicon Photodetectors for the Time-of-Flight Neutron Detector of the BM@N Experiment
To study the dependence of the equation of state of high density nuclear
matter on the term characterizing the isospin (proton-neutron) asymmetry of
nuclear matter, it is necessary to measure azimuthal flow of neutrons as well
as azimuthal flow of charged particles from a dense nuclear matter in the
nuclear-nuclear collisions. For this purpose INR RAS is developing a new
high-granular neutron detector which will be used in the BM@N experiment at the
extracted beam of the Nuclotron accelerator at JINR (Dubna). This detector will
identify neutrons and measure their energies in the heavy-ion collisions up to
4 GeV per nucleon.
This article presents the results of measurements of the time resolution and
light yields of samples of scintillation detectors with sizes
404025 mm that will be used in a neutron detector based on
the currently available fast plastic scintillator manufactured by JINR using an
EQR15 11-6060D-S photodetector for light readout. For comparison, the results
of measurements for a detector of the same size with a fast scintillator EJ-230
and with the same type of photodetector are given. The measurements were made
on cosmic muons as well as on the electron synchrotron "Pakhra" of the Lebedev
Physical Institute of the Russian Academy of Sciences located in Troitsk,
Moscow
Characteristics of the secondary electrons calibration beam of the accelerator S-25R "Pakhra"
The characteristics of the secondary electrons` calibration
quasi-monochromatic beam of the accelerator S-25R "Pakhra" of the Lebedev
Physical Institute of the Russian Academy of Sciences (LPI) on the basis of
magnet SP-57 are presented. With an electron energy in the range of 45-280 MeV,
a collimator diameter in front of the trigger counters of 3 mm and copper
Converter thicknesses of 1-3 mm, the energy resolution and beam intensity were
4.4-2.2% and around 16 e/sec, respectively
Wind regime of the mesosphere - Lower thermosphere of the Earth
Nowadays investigations of the wind regime of the mesosphere - lower thermosphere (80-100 km) using ground-based (including radiometeor method) and satellite measurements allow the setting and the decision of the task of the creation the global model of the circulation including background motions and temporal variability. The temporal variability is due to the wide spectrum of temporal and spatial scales of waves existing in the atmosphere. Radiosystem of Kazan University is one of 23 meteor radars operating currently in the World. Radiometeor wind measurements in Kazan University started in 1964. During the period of 1964-1965, the first annual cycle of observation is accomplished. Long cycles of observations accomplished during 1979-2002. Uninterrupted cycle of observations started in November 2002 allowed the detailed structure of the temporal variability in the region of the mesosphere - lower thermosphere. Modern methods of the analysis along with background motions allowed the detection of short-period (5-10 minutes) innergravity waves, tidal waves, planetary waves (2-30 days), seasonal variations (annual and semiannual oscillations). Dynamics of this height region of the atmosphere presents significant scientific and practical interests. Due to propagating from the lower atmosphere waves experience the dissipation and the filtration and affects to the altitudinal and seasonal structure of the circulation we should expect the affection of these waves to the disturbed structure of the ionosphere
ΠΠ»ΠΈΡΠ½ΠΈΠ΅ ΠΏΠΎΠ²Π΅Π΄Π΅Π½ΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠ°ΠΊΡΠΎΡΠ° Π²ΠΎΠ΄ΠΈΡΠ΅Π»Ρ Π½Π° ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½ΠΈΠ΅ ΡΡΠ°Π½ΡΠΏΠΎΡΡΠ½ΠΎΠ³ΠΎ Π·Π°ΡΠΎΡΠ°
Driving in a traffic flow implies involvement in difficult traffic situations that adversely affects response time of a driver, which in turn is considered when estimating stopping distance of a vehicle and determines road safety. This relationship shows the effect of driver behaviour in traffic flow on the road traffic situation. The objective of the study was to study behavioural factors that influence driverβs decisions. The study used methods of driver behaviour modelling, mathematical modelling, experimental studies of the mental and psychological functions of drivers. Modelling the driverβs behaviour, considering various combinations of many behavioural and other factors, leads to a large number of options for mathematical description of driver behaviour, which makes it difficult to use this approach to describe behaviour of drivers under the conditions of a real street-road network. The research has analysed several works devoted to the study of control action of drivers, using unknown coefficients, describing a model of movement of vehicles considering accuracy of their control. Driving through an unregulated intersection is considered as the most complex and informative version of driverβs behaviour. It is found that when modelling a traffic flow, it is necessary to take into account the degree of resoluteness of drivers (through determination of a coefficient of resoluteness which is a random variable that takes into account the probability distribution of the coefficientβs value in conjunction with the probability distribution of the function of traffic flow intensity). The distribution of the coefficient of resoluteness of drivers, obtained from experimental data, was subject to analysis. It is determined that the driving style affects formation of traffic congestion. The assessment of the driving style is made through conditional classification of driver behaviour on the road, namely marked by manifestation of aggression and timidity. When studying the behaviour of timid and aggressive drivers, several pairs of trajectories and the dynamics of the corresponding traffic flow density, were considered and calculated based on Edieβs model. It has been confirmed that traffic congestion has the greatest negative effect on choleric drivers and sanguine drivers. Besides, there is a relationship between the response time of a driver and the change in his functional condition. It is concluded that to improve road safety thanks to a more accurate assessment of possible risks of formation of congestion situations, it is necessary to consider behavioural characteristics and temperaments of the drivers.ΠΠ²ΠΈΠΆΠ΅Π½ΠΈΠ΅ Π²Π°Π²ΡΠΎΠΌΠΎΠ±ΠΈΠ»ΡΠ½ΠΎΠΌ ΠΏΠΎΡΠΎΠΊΠ΅ ΠΏΠΎΠ΄ΡΠ°Π·ΡΠΌΠ΅Π²Π°Π΅Ρ Π²ΠΎΠ²Π»Π΅ΡΠ΅Π½ΠΈΠ΅ Π² ΡΠ»ΠΎΠΆΠ½ΡΠ΅ Π΄ΠΎΡΠΎΠΆΠ½ΡΠ΅ ΡΠΈΡΡΠ°ΡΠΈΠΈ, ΠΎΡΡΠΈΡΠ°ΡΠ΅Π»ΡΠ½ΠΎ Π²Π»ΠΈΡΡΡΠΈΠ΅ Π½Π° Π²ΡΠ΅ΠΌΡ ΡΠ΅Π°ΠΊΡΠΈΠΈ Π²ΠΎΠ΄ΠΈΡΠ΅Π»Ρ, ΠΊΠΎΡΠΎΡΠ°Ρ Π² ΡΠ²ΠΎΡ ΠΎΡΠ΅ΡΠ΅Π΄Ρ ΡΡΠΈΡΡΠ²Π°Π΅ΡΡΡ ΠΏΡΠΈ ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΠΈ ΡΠΎΡΠΌΠΎΠ·Π½ΠΎΠ³ΠΎ ΠΏΡΡΠΈ ΡΡΠ°Π½ΡΠΏΠΎΡΡΠ½ΠΎΠ³ΠΎ ΡΡΠ΅Π΄ΡΡΠ²Π° ΠΈ ΠΎΠΏΡΠ΅Π΄Π΅Π»ΡΠ΅Ρ Π±Π΅Π·ΠΎΠΏΠ°ΡΠ½ΠΎΡΡΡ Π΄ΠΎΡΠΎΠΆΠ½ΠΎΠ³ΠΎ Π΄Π²ΠΈΠΆΠ΅Π½ΠΈΡ. ΠΡΠ° Π²Π·Π°ΠΈΠΌΠΎΡΠ²ΡΠ·Ρ ΠΏΠΎΠΊΠ°Π·ΡΠ²Π°Π΅Ρ Π²Π»ΠΈΡΠ½ΠΈΠ΅ ΠΏΠΎΠ²Π΅Π΄Π΅Π½ΠΈΡ Π²ΠΎΠ΄ΠΈΡΠ΅Π»Π΅ΠΉ Π² ΡΡΠ°Π½ΡΠΏΠΎΡΡΠ½ΠΎΠΌ ΠΏΠΎΡΠΎΠΊΠ΅ Π½Π° Π΄ΠΎΡΠΎΠΆΠ½ΠΎΡΡΠ°Π½ΡΠΏΠΎΡΡΠ½ΡΡ ΡΠΈΡΡΠ°ΡΠΈΡ. Π¦Π΅Π»ΡΡ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ Π±ΡΠ»ΠΎ ΠΈΠ·ΡΡΠ΅Π½ΠΈΠ΅ ΠΏΠΎΠ²Π΅Π΄Π΅Π½ΡΠ΅ΡΠΊΠΈΡ
ΡΠ°ΠΊΡΠΎΡΠΎΠ², Π²Π»ΠΈΡΡΡΠΈΡ
Π½Π° ΠΏΡΠΈΠ½ΡΡΠΈΠ΅ Π²ΠΎΠ΄ΠΈΡΠ΅Π»ΡΠΌΠΈ ΡΠ΅ΡΠ΅Π½ΠΈΠΉ. Π Ρ
ΠΎΠ΄Π΅ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½Ρ ΠΌΠ΅ΡΠΎΠ΄Ρ ΠΌΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΠΏΠΎΠ²Π΅Π΄Π΅Π½ΠΈΡ Π²ΠΎΠ΄ΠΈΡΠ΅Π»Π΅ΠΉ, ΠΌΠ°ΡΠ΅ΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΌΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΡ, ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΡΠ΅ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΠΏΡΠΈΡ
ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΈ ΠΏΡΠΈΡ
ΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΡΠ½ΠΊΡΠΈΠΉ Π²ΠΎΠ΄ΠΈΡΠ΅Π»Π΅ΠΉ. ΠΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ ΠΏΠΎΠ²Π΅Π΄Π΅Π½ΠΈΡ Π²ΠΎΠ΄ΠΈΡΠ΅Π»Ρ Ρ ΡΡΡΡΠΎΠΌ ΡΠ°Π·Π»ΠΈΡΠ½ΠΎΠ³ΠΎ ΡΠΎΡΠ΅ΡΠ°Π½ΠΈΡ ΠΌΠ½ΠΎΠΆΠ΅ΡΡΠ²Π° ΠΏΠΎΠ²Π΅Π΄Π΅Π½ΡΠ΅ΡΠΊΠΈΡ
ΠΈ ΠΈΠ½ΡΡ
ΡΠ°ΠΊΡΠΎΡΠΎΠ² ΠΏΡΠΈΠ²ΠΎΠ΄ΠΈΡ ΠΊ Π±ΠΎΠ»ΡΡΠΎΠΌΡ ΠΊΠΎΠ»ΠΈΡΠ΅ΡΡΠ²Ρ Π²Π°ΡΠΈΠ°Π½ΡΠΎΠ² ΠΌΠ°ΡΠ΅ΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΎΠΏΠΈΡΠ°Π½ΠΈΡ ΡΠ°ΠΊΠΎΠ³ΠΎ ΠΏΠΎΠ²Π΅Π΄Π΅Π½ΠΈΡ, ΡΡΠΎ Π·Π°ΡΡΡΠ΄Π½ΡΠ΅Ρ ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ Π΄Π°Π½Π½ΠΎΠ³ΠΎ ΠΏΠΎΠ΄Ρ
ΠΎΠ΄Π° ΠΏΡΠΈ ΠΎΠΏΠΈΡΠ°Π½ΠΈΠΈ ΠΏΠΎΠ²Π΅Π΄Π΅Π½ΠΈΡ Π²ΠΎΠ΄ΠΈΡΠ΅Π»Π΅ΠΉ Π² ΡΡΠ»ΠΎΠ²ΠΈΡΡ
ΡΠ΅Π°Π»ΡΠ½ΠΎΠΉ ΡΠ»ΠΈΡΠ½ΠΎ-Π΄ΠΎΡΠΎΠΆΠ½ΠΎΠΉ ΡΠ΅ΡΠΈ. ΠΡΠΎΠ°Π½Π°Π»ΠΈΠ·ΠΈΡΠΎΠ²Π°Π½Ρ ΡΠ°Π±ΠΎΡΡ, ΠΏΠΎΡΠ²ΡΡΡΠ½Π½ΡΠ΅ ΠΈΠ·ΡΡΠ΅Π½ΠΈΡ ΡΠΏΡΠ°Π²Π»ΡΡΡΠ΅Π³ΠΎ Π²ΠΎΠ·Π΄Π΅ΠΉΡΡΠ²ΠΈΡ Π²ΠΎΠ΄ΠΈΡΠ΅Π»Ρ Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ Π½Π΅ΠΈΠ·Π²Π΅ΡΡΠ½ΡΡ
ΠΊΠΎΡΡΡΠΈΡΠΈΠ΅Π½ΡΠΎΠ², ΠΎΠΏΠΈΡΡΠ²Π°ΡΡΠΈΡ
ΠΌΠΎΠ΄Π΅Π»Ρ Π΄Π²ΠΈΠΆΠ΅Π½ΠΈΡ ΡΡΠ°Π½ΡΠΏΠΎΡΡΠ½ΡΡ
ΡΡΠ΅Π΄ΡΡΠ² Ρ ΡΡΡΡΠΎΠΌ ΡΠΎΡΠ½ΠΎΡΡΠΈ ΡΠΏΡΠ°Π²Π»Π΅Π½ΠΈΡ ΠΈΠΌ. Π Π°ΡΡΠΌΠΎΡΡΠ΅Π½ Π½Π°ΠΈΠ±ΠΎΠ»Π΅Π΅ ΡΠ»ΠΎΠΆΠ½ΡΠΉ ΠΈ ΠΏΠΎΠΊΠ°Π·Π°ΡΠ΅Π»ΡΠ½ΡΠΉ Π²Π°ΡΠΈΠ°Π½Ρ ΠΏΠΎΠ²Π΅Π΄Π΅Π½ΠΈΡ Π²ΠΎΠ΄ΠΈΡΠ΅Π»Ρ ΠΏΡΠΈ ΠΏΡΠΎΠ΅Π·Π΄Π΅ Π½Π΅ΡΠ΅Π³ΡΠ»ΠΈΡΡΠ΅ΠΌΠΎΠ³ΠΎ ΠΏΠ΅ΡΠ΅ΡΠ΅ΡΠ΅Π½ΠΈΡ. Π£ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ, ΡΡΠΎ ΠΏΡΠΈ ΠΌΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΠΈ ΡΡΠ°Π½ΡΠΏΠΎΡΡΠ½ΠΎΠ³ΠΎ ΠΏΠΎΡΠΎΠΊΠ° Π½Π΅ΠΎΠ±Ρ
ΠΎΠ΄ΠΈΠΌΠΎ ΡΡΠΈΡΡΠ²Π°ΡΡ ΡΡΠ΅ΠΏΠ΅Π½Ρ ΡΠ΅ΡΠΈΡΠ΅Π»ΡΠ½ΠΎΡΡΠΈ Π²ΠΎΠ΄ΠΈΡΠ΅Π»Π΅ΠΉ (ΡΠ΅ΡΠ΅Π· ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΠ΅ ΠΊΠΎΡΡΡΠΈΡΠΈΠ΅Π½ΡΠ° ΡΠ΅ΡΠΈΡΠ΅Π»ΡΠ½ΠΎΡΡΠΈβ ΡΠ»ΡΡΠ°ΠΉΠ½ΡΡ Π²Π΅Π»ΠΈΡΠΈΠ½Ρ Ρ ΡΡΡΡΠΎΠΌ ΡΠ°ΡΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΡ Π²Π΅ΡΠΎΡΡΠ½ΠΎΡΡΠΈ Π΅Π³ΠΎ Π·Π½Π°ΡΠ΅Π½ΠΈΡ Π² ΡΠΎΠ²ΠΎΠΊΡΠΏΠ½ΠΎΡΡΠΈ Ρ ΡΠ°ΡΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΠ΅ΠΌ Π²Π΅ΡΠΎΡΡΠ½ΠΎΡΡΠ΅ΠΉ ΡΡΠ½ΠΊΡΠΈΠΈ ΠΈΠ½ΡΠ΅Π½ΡΠΈΠ²Π½ΠΎΡΡΠΈ ΡΡΠ°Π½ΡΠΏΠΎΡΡΠ½ΠΎΠ³ΠΎ ΠΏΠΎΡΠΎΠΊΠ°). ΠΡΠΎΠ°Π½Π°Π»ΠΈΠ·ΠΈΡΠΎΠ²Π°Π½ΠΎ ΡΠ°ΡΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΠ΅ ΠΊΠΎΡΡΡΠΈΡΠΈΠ΅Π½ΡΠ° ΡΠ΅ΡΠΈΡΠ΅Π»ΡΠ½ΠΎΡΡΠΈ Π²ΠΎΠ΄ΠΈΡΠ΅Π»Π΅ΠΉ, ΠΏΠΎΠ»ΡΡΠ΅Π½Π½ΠΎΠ΅ ΠΏΠΎ ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΡΠΌ Π΄Π°Π½Π½ΡΠΌ. ΠΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΎ, ΡΡΠΎ Π½Π° ΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ ΡΡΠ°Π½ΡΠΏΠΎΡΡΠ½ΠΎΠ³ΠΎ Π·Π°ΡΠΎΡΠ° ΠΎΠΊΠ°Π·ΡΠ²Π°Π΅Ρ Π²Π»ΠΈΡΠ½ΠΈΠ΅ ΡΡΠΈΠ»Ρ Π²ΠΎΠΆΠ΄Π΅Π½ΠΈΡ, Π΄Π»Ρ ΠΎΡΠ΅Π½ΠΊΠΈ ΠΊΠΎΡΠΎΡΠΎΠ³ΠΎ ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΡΡ ΡΡΠ»ΠΎΠ²Π½ΡΡ ΠΊΠ»Π°ΡΡΠΈΡΠΈΠΊΠ°ΡΠΈΡ ΠΏΠΎΠ²Π΅Π΄Π΅Π½ΠΈΡ Π²ΠΎΠ΄ΠΈΡΠ΅Π»Π΅ΠΉ Π½Π° Π΄ΠΎΡΠΎΠ³Π΅, Π°ΠΈΠΌΠ΅Π½Π½ΠΎ ΠΏΡΠΎΡΠ²Π»Π΅Π½ΠΈΠ΅ Π°Π³ΡΠ΅ΡΡΠΈΠΈ ΠΈ ΡΠΎΠ±ΠΎΡΡΠΈ. ΠΡΠΈ ΠΈΠ·ΡΡΠ΅Π½ΠΈΠΈ ΠΏΠΎΠ²Π΅Π΄Π΅Π½ΠΈΡ ΡΠΎΠ±ΠΊΠΈΡ
ΠΈ Π°Π³ΡΠ΅ΡΡΠΈΠ²Π½ΡΡ
Π²ΠΎΠ΄ΠΈΡΠ΅Π»Π΅ΠΉ ΡΠ°ΡΡΠΌΠΎΡΡΠ΅Π½ΠΎ Π½Π΅ΡΠΊΠΎΠ»ΡΠΊΠΎ ΠΏΠ°Ρ ΡΡΠ°Π΅ΠΊΡΠΎΡΠΈΠΉ Π΄Π²ΠΈΠΆΠ΅Π½ΠΈΡ ΠΈ Π΄ΠΈΠ½Π°ΠΌΠΈΠΊΠ° ΡΠΎΠΎΡΠ²Π΅ΡΡΡΠ²ΡΡΡΠ΅ΠΉ ΠΏΠ»ΠΎΡΠ½ΠΎΡΡΠΈ ΡΡΠ°Π½ΡΠΏΠΎΡΡΠ½ΠΎΠ³ΠΎ ΠΏΠΎΡΠΎΠΊΠ°, ΠΊΠΎΡΠΎΡΡΠ΅ ΡΠ°ΡΡΡΠΈΡΠ°Π½Ρ Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΠΌΠΎΠ΄Π΅Π»ΠΈ Edieβs. ΠΠΎΠ΄ΡΠ²Π΅ΡΠΆΠ΄Π΅Π½ΠΎ, ΡΡΠΎ Π½Π°ΠΈΠ±ΠΎΠ»ΡΡΠ΅Π΅ ΠΎΡΡΠΈΡΠ°ΡΠ΅Π»ΡΠ½ΠΎΠ΅ Π²Π»ΠΈΡΠ½ΠΈΠ΅ ΡΡΠ°Π½ΡΠΏΠΎΡΡΠ½ΡΠ΅ Π·Π°ΡΠΎΡΡ ΠΎΠΊΠ°Π·ΡΠ²Π°ΡΡ Π½Π° Π²ΠΎΠ΄ΠΈΡΠ΅Π»Π΅ΠΉ-Ρ
ΠΎΠ»Π΅ΡΠΈΠΊΠΎΠ² ΠΈΠ½Π° Π²ΠΎΠ΄ΠΈΡΠ΅Π»Π΅ΠΉ-ΡΠ°Π½Π³Π²ΠΈΠ½ΠΈΠΊΠΎΠ². ΠΡΠΎΠΌΠ΅ ΡΠΎΠ³ΠΎ, ΠΏΡΠΎΡΠ»Π΅ΠΆΠΈΠ²Π°Π΅ΡΡΡ Π²Π·Π°ΠΈΠΌΠΎΡΠ²ΡΠ·Ρ ΠΌΠ΅ΠΆΠ΄Ρ Π²ΡΠ΅ΠΌΠ΅Π½Π΅ΠΌ ΡΠ΅Π°ΠΊΡΠΈΠΈ Π²ΠΎΠ΄ΠΈΡΠ΅Π»Ρ ΠΈ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ΠΌ Π΅Π³ΠΎ ΡΡΠ½ΠΊΡΠΈΠΎΠ½Π°Π»ΡΠ½ΠΎΠ³ΠΎ ΡΠΎΡΡΠΎΡΠ½ΠΈΡ. Π‘Π΄Π΅Π»Π°Π½ Π²ΡΠ²ΠΎΠ΄, ΡΡΠΎ Π² ΡΠ΅Π»ΡΡ
ΠΏΠΎΠ²ΡΡΠ΅Π½ΠΈΡ Π±Π΅Π·ΠΎΠΏΠ°ΡΠ½ΠΎΡΡΠΈ Π΄ΠΎΡΠΎΠΆΠ½ΠΎΠ³ΠΎ Π΄Π²ΠΈΠΆΠ΅Π½ΠΈΡ Π·Π° ΡΡΡΡ Π±ΠΎΠ»Π΅Π΅ ΡΠΎΡΠ½ΠΎΠΉ ΠΎΡΠ΅Π½ΠΊΠΈ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΡΡ
ΡΠΈΡΠΊΠΎΠ² Π²ΠΎΠ·Π½ΠΈΠΊΠ½ΠΎΠ²Π΅Π½ΠΈΡ Π·Π°ΡΠΎΡΠΎΠ²ΡΡ
ΡΠΈΡΡΠ°ΡΠΈΠΉ Π½Π΅ΠΎΠ±Ρ
ΠΎΠ΄ΠΈΠΌΠΎ ΡΡΠΈΡΡΠ²Π°ΡΡ ΠΏΠΎΠ²Π΅Π΄Π΅Π½ΡΠ΅ΡΠΊΠΈΠ΅ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΠΈ Π²ΠΎΠ΄ΠΈΡΠ΅Π»Π΅ΠΉ ΠΈ ΠΈΡ
ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΠΌΠ΅Π½ΡΡ
ΠΠ»ΠΈΡΠ½ΠΈΠ΅ ΡΠ°ΡΡΠΈΡΠ½ΠΎΠ³ΠΎ Π·Π°ΠΌΠ΅ΡΠ΅Π½ΠΈΡ ΡΠΈΡΠ°Π½Π° Π΅Π³ΠΎ Π³ΠΈΠ΄ΡΠΈΠ΄ΠΎΠΌ Π½Π° ΡΡΡΡΠΊΡΡΡΡ ΠΈ ΡΠ²ΠΎΠΉΡΡΠ²Π° ΠΆΠ°ΡΠΎΠΏΡΠΎΡΠ½ΠΎΠ³ΠΎ ΡΠΏΠ»Π°Π²Π° TNM-B1, ΠΏΠΎΠ»ΡΡΠ΅Π½Π½ΠΎΠ³ΠΎ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ Π³ΠΎΡΡΡΠ΅Π³ΠΎ ΠΈΠ·ΠΎΡΡΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΏΡΠ΅ΡΡΠΎΠ²Π°Π½ΠΈΡ Π‘ΠΠ‘-ΠΏΠΎΡΠΎΡΠΊΠ°
This paper investigates the influence of partial substitution of titanium by its hydride on the microstructure and mechanical properties of TNM-B1 alloy obtained by powder metallurgy technology. The impact of the Ti:TiH2 ratio in the reaction mixture and heat treatment modes on the microstructure and mechanical properties of TNM-B1+1%Y2O3 alloy, obtained using high-energy ball milling (HEBM), selfpropagating high-temperature synthesis (SHS), and hot isostatic pressing (HIP) methods, has been examined. It was observed that a 10 % substitution of titanium with its hydride in the reaction mixtures reduces the oxygen content in SHS products from 1 % to 0.8 % due to the generation of a reducing atmosphere during the decomposition of TiH2 in the combustion wave. When the Ti : TiH2 ratio is 90 : 10, highest mechanical properties of TNM-B1+1%Y2O3 alloy were achieved: a compressive strength (Οu) of 1200Β±15 MPa and a yield strength (YS) of 1030Β±25 MPa. An increase in the proportion of TiH2 results in a higher content of oxygen impurity, leading to the formation of Al2O3, which reduces the strength and ductility of the material. With additional heat treatment of TNM-B1+1%Y2O3 alloy, the globular structure transforms into a partially lamellar one, leading to an increase in Οu by 50β300 MPa, depending on the TiH2 content. This attributed to a decrease in the average grain size and a reduction in dislocation mobility during deformation.Π ΡΠ°Π±ΠΎΡΠ΅ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΎ Π²Π»ΠΈΡΠ½ΠΈΠ΅ ΡΠ°ΡΡΠΈΡΠ½ΠΎΠ³ΠΎ Π·Π°ΠΌΠ΅ΡΠ΅Π½ΠΈΡ ΡΠΈΡΠ°Π½Π° Π΅Π³ΠΎ Π³ΠΈΠ΄ΡΠΈΠ΄ΠΎΠΌ Π½Π° ΠΌΠΈΠΊΡΠΎΡΡΡΡΠΊΡΡΡΡ ΠΈ ΠΌΠ΅Ρ
Π°Π½ΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΡΠ²ΠΎΠΉΡΡΠ²Π° ΡΠΏΠ»Π°Π²Π° TNM-B1, ΠΏΠΎΠ»ΡΡΠ΅Π½Π½ΠΎΠ³ΠΎ ΠΏΠΎ ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΠΈΠΈ ΠΏΠΎΡΠΎΡΠΊΠΎΠ²ΠΎΠΉ ΠΌΠ΅ΡΠ°Π»Π»ΡΡΠ³ΠΈΠΈ. Π Π°ΡΡΠΌΠΎΡΡΠ΅Π½ΠΎ Π²Π»ΠΈΡΠ½ΠΈΠ΅ ΡΠΎΠΎΡΠ½ΠΎΡΠ΅Π½ΠΈΡ Ti:TiH2 Π² ΡΠ΅Π°ΠΊΡΠΈΠΎΠ½Π½ΠΎΠΉ ΡΠΌΠ΅ΡΠΈ ΠΈ ΡΠ΅ΠΆΠΈΠΌΠΎΠ² ΡΠ΅ΡΠΌΠΎΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠΈ Π½Π° ΠΌΠΈΠΊΡΠΎΡΡΡΡΠΊΡΡΡΡ ΠΈ ΠΌΠ΅Ρ
Π°Π½ΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΡΠ²ΠΎΠΉΡΡΠ²Π° ΡΠΏΠ»Π°Π²Π° TNM-B1+1%Y2O3, ΠΏΠΎΠ»ΡΡΠ΅Π½Π½ΠΎΠ³ΠΎ Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠ² Π²ΡΡΠΎΠΊΠΎΡΠ½Π΅ΡΠ³Π΅ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΌΠ΅Ρ
Π°Π½ΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠΈ (ΠΠΠΠ), ΡΠ°ΠΌΠΎΡΠ°ΡΠΏΡΠΎΡΡΡΠ°Π½ΡΡΡΠ΅Π³ΠΎΡΡ Π²ΡΡΠΎΠΊΠΎΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΠ½ΠΎΠ³ΠΎ ΡΠΈΠ½ΡΠ΅Π·Π° (Π‘ΠΠ‘) ΠΈ Π³ΠΎΡΡΡΠ΅Π³ΠΎ ΠΈΠ·ΠΎΡΡΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΏΡΠ΅ΡΡΠΎΠ²Π°Π½ΠΈΡ (ΠΠΠ). Π£ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ, ΡΡΠΎ 10 %-Π½ΠΎΠ΅ Π·Π°ΠΌΠ΅ΡΠ΅Π½ΠΈΠ΅ ΡΠΈΡΠ°Π½Π° Π΅Π³ΠΎ Π³ΠΈΠ΄ΡΠΈΠ΄ΠΎΠΌ Π² ΡΠ΅Π°ΠΊΡΠΈΠΎΠ½Π½ΡΡ
ΡΠΌΠ΅ΡΡΡ
ΠΏΠΎΠ·Π²ΠΎΠ»ΡΠ΅Ρ ΡΠΌΠ΅Π½ΡΡΠΈΡΡ ΡΠΎΠ΄Π΅ΡΠΆΠ°Π½ΠΈΠ΅ ΠΊΠΈΡΠ»ΠΎΡΠΎΠ΄Π° Π² Π‘ΠΠ‘-ΠΏΡΠΎΠ΄ΡΠΊΡΠ°Ρ
Ρ 1 Π΄ΠΎ 0,8 % Π±Π»Π°Π³ΠΎΠ΄Π°ΡΡ ΡΠΎΠ·Π΄Π°Π½ΠΈΡ Π²ΠΎΡΡΡΠ°Π½ΠΎΠ²ΠΈΡΠ΅Π»ΡΠ½ΠΎΠΉ Π°ΡΠΌΠΎΡΡΠ΅ΡΡ ΠΏΡΠΈ ΡΠ°Π·Π»ΠΎΠΆΠ΅Π½ΠΈΠΈ TiH2 Π² Π²ΠΎΠ»Π½Π΅ Π³ΠΎΡΠ΅Π½ΠΈΡ. ΠΡΠΈ ΡΠΎΠΎΡΠ½ΠΎΡΠ΅Π½ΠΈΠΈ Ti : TiH2 = = 90 : 10 Π΄ΠΎΡΡΠΈΠ³Π½ΡΡΡ ΠΌΠ°ΠΊΡΠΈΠΌΠ°Π»ΡΠ½ΡΠ΅ ΠΌΠ΅Ρ
Π°Π½ΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΡΠ²ΠΎΠΉΡΡΠ²Π° ΡΠΏΠ»Π°Π²Π° TNM-B1+1%Y2O3: ΠΏΡΠΎΡΠ½ΠΎΡΡΡ ΠΏΡΠΈ ΡΠΆΠ°ΡΠΈΠΈ ΟΠ² = 1200Β±15 ΠΠΠ° ΠΈ ΠΏΡΠ΅Π΄Π΅Π» ΡΠ΅ΠΊΡΡΠ΅ΡΡΠΈ Ο0,2 = 1030Β±25 ΠΠΠ°. Π ΠΎΡΡ Π΄ΠΎΠ»ΠΈ TiH2 ΡΠ²Π΅Π»ΠΈΡΠΈΠ²Π°Π΅Ρ ΡΠΎΠ΄Π΅ΡΠΆΠ°Π½ΠΈΠ΅ ΠΏΡΠΈΠΌΠ΅ΡΠ½ΠΎΠ³ΠΎ ΠΊΠΈΡΠ»ΠΎΡΠΎΠ΄Π°, ΠΏΡΠΈΠ²ΠΎΠ΄ΡΡΠ΅Π³ΠΎ ΠΊ ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½ΠΈΡ Al2O3, ΠΊΠΎΡΠΎΡΡΠΉ ΡΠ½ΠΈΠΆΠ°Π΅Ρ ΠΏΡΠΎΡΠ½ΠΎΡΡΡ ΠΈ ΠΏΠ»Π°ΡΡΠΈΡΠ½ΠΎΡΡΡ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Π°. ΠΠ° ΡΡΠ΅Ρ Π΄ΠΎΠΏΠΎΠ»Π½ΠΈΡΠ΅Π»ΡΠ½ΠΎΠΉ ΡΠ΅ΡΠΌΠΎΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠΈ ΡΠΏΠ»Π°Π²Π° TNM-B1+1%Y2O3 Π³Π»ΠΎΠ±ΡΠ»ΡΡΠ½Π°Ρ ΡΡΡΡΠΊΡΡΡΠ° ΠΏΡΠ΅ΠΎΠ±ΡΠ°Π·ΡΠ΅ΡΡΡ Π² ΡΠ°ΡΡΠΈΡΠ½ΠΎ Π»Π°ΠΌΠ΅Π»Π»ΡΡΠ½ΡΡ, ΡΡΠΎ ΠΏΡΠΈΠ²ΠΎΠ΄ΠΈΡ ΠΊ ΡΠ²Π΅Π»ΠΈΡΠ΅Π½ΠΈΡ ΟΠ² Π½Π° 50β 300 ΠΠΠ° Π² Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡΠΈ ΠΎΡ ΡΠΎΠ΄Π΅ΡΠΆΠ°Π½ΠΈΡ TiH2. ΠΠΎΠ»ΡΡΠ°Π΅ΠΌΡΠΉ ΡΡΡΠ΅ΠΊΡ ΠΎΠ±ΡΡΠ»ΠΎΠ²Π»Π΅Π½ ΡΠΌΠ΅Π½ΡΡΠ΅Π½ΠΈΠ΅ΠΌ ΡΡΠ΅Π΄Π½Π΅Π³ΠΎ ΡΠ°Π·ΠΌΠ΅ΡΠ° Π·Π΅ΡΠ΅Π½ ΠΈ ΡΠ½ΠΈΠΆΠ΅Π½ΠΈΠ΅ΠΌ ΠΏΠΎΠ΄Π²ΠΈΠΆΠ½ΠΎΡΡΠΈ Π΄ΠΈΡΠ»ΠΎΠΊΠ°ΡΠΈΠΉ ΠΏΡΠΈ Π΄Π΅ΡΠΎΡΠΌΠ°ΡΠΈΠΈ
- β¦