151 research outputs found
ΠΠΠΠΠΠΠ’ΠΠΠ Π’ΠΠ§ΠΠΠΠ― Π‘ ΠΠΠΠΠΠΠΠΠΠ ΠΠ‘ΠΠΠΠΠ’Π ΠΠ§ΠΠ«Π₯ ΠΠΠΠΠΠΠΠΠ ΠΠΠ‘Π’Π Π£ΠΠΠΠ’Π
The paper considers turning kinematics of structural carbon and alloy steels with imposition of directed asymmetric cutting tool vibrations on a conventional cutting pattern which are created by a cam system. An influence of tool vibratory motion parameters on crushing process of flow chips has been determined in the paper. The paper contains an equation of tool motion and reveals an influence of asymmetric coefficient of tool vibration cycle on slice thickness and dimensions of chip elements.Β Π Π°ΡΡΠΌΠΎΡΡΠ΅Π½Π° ΠΊΠΈΠ½Π΅ΠΌΠ°ΡΠΈΠΊΠ° ΡΠΎΡΠ΅Π½ΠΈΡ ΠΊΠΎΠ½ΡΡΡΡΠΊΡΠΈΠΎΠ½Π½ΡΡ
ΡΠ³Π»Π΅ΡΠΎΠ΄ΠΈΡΡΡΡ
ΠΈ Π»Π΅Π³ΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
ΡΡΠ°Π»Π΅ΠΉ Ρ Π½Π°Π»ΠΎΠΆΠ΅Π½ΠΈΠ΅ΠΌ Π½Π° ΡΡΠ°Π΄ΠΈΡΠΈΠΎΠ½Π½ΡΡ ΡΡ
Π΅ΠΌΡ ΡΠ΅Π·Π°Π½ΠΈΡ Π½Π°ΠΏΡΠ°Π²Π»Π΅Π½Π½ΡΡ
Π°ΡΠΈΠΌΠΌΠ΅ΡΡΠΈΡΠ½ΡΡ
ΠΊΠΎΠ»Π΅Π±Π°Π½ΠΈΠΉ ΡΠ΅ΠΆΡΡΠ΅Π³ΠΎ ΠΈΠ½ΡΡΡΡΠΌΠ΅Π½ΡΠ°, ΡΠΎΠ·Π΄Π°Π²Π°Π΅ΠΌΡΡ
ΠΊΡΠ»Π°ΡΠΊΠΎΠ²ΠΎΠΉ ΡΠΈΡΡΠ΅ΠΌΠΎΠΉ. ΠΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΎ Π²Π»ΠΈΡΠ½ΠΈΠ΅ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΎΠ² ΠΊΠΎΠ»Π΅Π±Π°ΡΠ΅Π»ΡΠ½ΠΎΠ³ΠΎ Π΄Π²ΠΈΠΆΠ΅Π½ΠΈΡ ΠΈΠ½ΡΡΡΡΠΌΠ΅Π½ΡΠ° Π½Π° ΠΏΡΠΎΡΠ΅ΡΡ Π΄ΡΠΎΠ±Π»Π΅Π½ΠΈΡ ΡΠ»ΠΈΠ²Π½ΠΎΠΉ ΡΡΡΡΠΆΠΊΠΈ, ΠΏΠΎΠ»ΡΡΠ΅Π½ΠΎ ΡΡΠ°Π²Π½Π΅Π½ΠΈΠ΅ Π΄Π²ΠΈΠΆΠ΅Π½ΠΈΡ ΠΈΠ½ΡΡΡΡΠΌΠ΅Π½ΡΠ°, ΡΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ Π²Π»ΠΈΡΠ½ΠΈΠ΅ ΠΊΠΎΡΡΡΠΈΡΠΈΠ΅Π½ΡΠ° Π°ΡΠΈΠΌΠΌΠ΅ΡΡΠΈΠΈ ΡΠΈΠΊΠ»Π° ΠΊΠΎΠ»Π΅Π±Π°Π½ΠΈΠΉ ΠΈΠ½ΡΡΡΡΠΌΠ΅Π½ΡΠ° Π½Π° ΡΠΎΠ»ΡΠΈΠ½Ρ ΡΡΠ΅Π·Π°Π΅ΠΌΠΎΠ³ΠΎ ΡΠ»ΠΎΡ ΠΈ ΡΠ°Π·ΠΌΠ΅ΡΡ ΠΎΠ±ΡΠ°Π·ΡΠ΅ΠΌΡΡ
ΡΠ»Π΅ΠΌΠ΅Π½ΡΠΎΠ² ΡΡΡΡΠΆΠΊΠΈ
ΠΠΎΠ½ΠΈΡΠΎΡΠΈΠ½Π³ ΠΏΠΎΠ»ΠΎΠΌΠΎΠΊ ΡΠ΅Π·ΡΠΎΠ² ΠΈΡΠΏΠΎΠ»Π½ΠΈΡΠ΅Π»ΡΠ½ΠΎΠ³ΠΎ ΠΎΡΠ³Π°Π½Π° Π³ΠΎΡΠ½ΠΎΠ³ΠΎ ΠΊΠΎΠΌΠ±Π°ΠΉΠ½Π° ΠΏΠΎ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠ°ΠΌ ΠΌΠ΅Ρ Π°Π½ΠΈΡΠ΅ΡΠΊΠΈΡ ΠΊΠΎΠ»Π΅Π±Π°Π½ΠΈΠΉ. Π§Π°ΡΡΡ 2. ΠΠ΅ΡΠΎΠ΄ΠΈΠΊΠ° ΡΠΎΠ·Π΄Π°Π½ΠΈΡ ΡΠΈΡΡΠ΅ΠΌΡ ΠΌΠΎΠ±ΠΈΠ»ΡΠ½ΠΎΠ³ΠΎ ΠΌΠΎΠ½ΠΈΡΠΎΡΠΈΠ½Π³Π° ΠΏΠΎΠ»ΠΎΠΌΠΎΠΊ ΡΠ΅Π·ΡΠΎΠ²ΠΏΠΎ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠ°ΠΌ ΠΌΠ΅Ρ Π°Π½ΠΈΡΠ΅ΡΠΊΠΈΡ ΠΊΠΎΠ»Π΅Π±Π°Π½ΠΈΠΉ ΡΠ΅Π΄ΡΠΊΡΠΎΡΠ° Ρ ΡΠΎΠ±ΡΡΠ²Π΅Π½Π½ΠΎΠΉ ΡΠ°ΡΡΠΎΡΠΎΠΉ
The development of research in the field of creating a mobile monitoring system for diagnosing the technical condition of mining equipment in terms of mechanical vibration parameters is one of the most science-intensive areas. The paper presents the results of investigations on the possibility of isolating the mechanical vibrations of the handles with a natural frequency Β of 5 Hz, which occur with a greater or lesser amplitude in almost all registered spectra, arising from breakages Β of cutters on the cutting discs of double-flow drives of the executive body of a mining machine. Therefore, it can be used for operational mobile monitoring of breakages in the cutters of the executive bodies of mining machines. An analysis of vibrations has confirmed the fact that they are transmitted to almost all non-rotating parts of the combine, where they can be registered, which allows them to be used for mobile automated monitoring of cutter breakages on cutting discs. On the example of the combine βUniversal-600β it has been found that the most convenient when registering these vibrations from the standpoint of the absence of the need to introduce a signal transmission module from the rotating parts of the combine into the measuring path can be considered the placement of a vibration sensor on the body of the input gearbox of the executive body drive with its orientation in the direction combine movements, where oscillations with a frequency of Β 5 Hz are prevalent and it is quite simple to isolate them from the low-frequency range using standardized low-frequency one-third octave filters. The paper proposes a technique for creating a system for automated mobile monitoring of cutter breakages based on the parameters of mechanical vibrations of cutting discs with natural frequency.Β Π‘ΠΎΠ·Π΄Π°Π½ΠΈΠ΅ ΡΠΈΡΡΠ΅ΠΌΡ ΠΌΠΎΠ±ΠΈΠ»ΡΠ½ΠΎΠ³ΠΎ ΠΌΠΎΠ½ΠΈΡΠΎΡΠΈΠ½Π³Π° Π΄Π»Ρ Π΄ΠΈΠ°Π³Π½ΠΎΡΡΠΈΠΊΠΈ ΡΠ΅Ρ
Π½ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠΎΡΡΠΎΡΠ½ΠΈΡ ΠΎΠ±ΡΠ΅ΠΊΡΠΎΠ² Π³ΠΎΡΠ½ΠΎΠΉ ΡΠ΅Ρ
Π½ΠΈΠΊΠΈ ΠΏΠΎ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠ°ΠΌ ΠΌΠ΅Ρ
Π°Π½ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΊΠΎΠ»Π΅Π±Π°Π½ΠΈΠΉ ΡΠ²Π»ΡΠ΅ΡΡΡ ΠΎΠ΄Π½ΠΈΠΌ ΠΈΠ· ΡΠ°ΠΌΡΡ
Π½Π°ΡΠΊΠΎΠ΅ΠΌΠΊΠΈΡ
Π½Π°ΠΏΡΠ°Π²Π»Π΅Π½ΠΈΠΉ. Π ΡΡΠ°ΡΡΠ΅ ΠΏΡΠΈΠ²Π΅Π΄Π΅Π½Ρ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ ΠΈΠ·ΡΡΠ΅Π½ΠΈΡ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡΠΈ Π²ΡΠ΄Π΅Π»Π΅Π½ΠΈΡ Π²ΠΎΠ·Π½ΠΈΠΊΠ°ΡΡΠΈΡ
ΠΏΡΠΈ ΠΏΠΎΠ»ΠΎΠΌΠΊΠ°Ρ
ΡΠ΅Π·ΡΠΎΠ² Π½Π° ΡΠ΅ΠΆΡΡΠΈΡ
Π΄ΠΈΡΠΊΠ°Ρ
Π΄Π²ΡΡ
ΠΏΠΎΡΠΎΡΠ½ΡΡ
ΠΏΡΠΈΠ²ΠΎΠ΄ΠΎΠ² ΠΈΡΠΏΠΎΠ»Π½ΠΈΡΠ΅Π»ΡΠ½ΠΎΠ³ΠΎ ΠΎΡΠ³Π°Π½Π° Π³ΠΎΡΠ½ΠΎΠ³ΠΎ ΠΊΠΎΠΌΠ±Π°ΠΉΠ½Π° ΠΌΠ΅Ρ
Π°Π½ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΊΠΎΠ»Π΅Π±Π°Π½ΠΈΠΉ ΡΡΠΊΠΎΡΡΠ΅ΠΉ Ρ ΡΠΎΠ±ΡΡΠ²Π΅Π½Π½ΠΎΠΉ ΡΠ°ΡΡΠΎΡΠΎΠΉ Β»5 ΠΡ, ΠΊΠΎΡΠΎΡΠ°Ρ Ρ Π±ΠΎΠ»ΡΡΠ΅ΠΉ ΠΈΠ»ΠΈ ΠΌΠ΅Π½ΡΡΠ΅ΠΉ Π°ΠΌΠΏΠ»ΠΈΡΡΠ΄ΠΎΠΉ ΠΏΡΠΈΡΡΡΡΡΠ²ΡΠ΅Ρ ΠΏΡΠ°ΠΊΡΠΈΡΠ΅ΡΠΊΠΈ Π²ΠΎ Π²ΡΠ΅Ρ
Π·Π°ΡΠ΅Π³ΠΈΡΡΡΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
ΡΠΏΠ΅ΠΊΡΡΠ°Ρ
. ΠΠΎΡΡΠΎΠΌΡ Π΅Π΅ ΠΌΠΎΠΆΠ½ΠΎ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°ΡΡ Π΄Π»Ρ ΠΎΠΏΠ΅ΡΠ°ΡΠΈΠ²Π½ΠΎΠ³ΠΎ ΠΌΠΎΠ±ΠΈΠ»ΡΠ½ΠΎΠ³ΠΎ ΠΌΠΎΠ½ΠΈΡΠΎΡΠΈΠ½Π³Π° ΠΏΠΎΠ»ΠΎΠΌΠΎΠΊ ΡΠ΅Π·ΡΠΎΠ² ΠΈΡΠΏΠΎΠ»Π½ΠΈΡΠ΅Π»ΡΠ½ΡΡ
ΠΎΡΠ³Π°Π½ΠΎΠ² Π³ΠΎΡΠ½ΡΡ
ΠΊΠΎΠΌΠ±Π°ΠΉΠ½ΠΎΠ². ΠΠ½Π°Π»ΠΈΠ· ΠΊΠΎΠ»Π΅Π±Π°Π½ΠΈΠΉ ΠΏΠΎΠ΄ΡΠ²Π΅ΡΠ΄ΠΈΠ», ΡΡΠΎ ΠΎΠ½ΠΈ ΠΏΠ΅ΡΠ΅Π΄Π°ΡΡΡΡ ΠΏΡΠ°ΠΊΡΠΈΡΠ΅ΡΠΊΠΈ Π½Π° Π²ΡΠ΅ Π½Π΅Π²ΡΠ°ΡΠ°ΡΡΠΈΠ΅ΡΡ ΡΠ°ΡΡΠΈ ΠΊΠΎΠΌΠ±Π°ΠΉΠ½Π°, Π³Π΄Π΅ ΠΌΠΎΠ³ΡΡ Π±ΡΡΡ Π·Π°ΡΠ΅Π³ΠΈΡΡΡΠΈΡΠΎΠ²Π°Π½Ρ, ΡΡΠΎ ΠΏΠΎΠ·Π²ΠΎΠ»ΡΠ΅Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°ΡΡ ΠΈΡ
Π΄Π»Ρ ΠΌΠΎΠ±ΠΈΠ»ΡΠ½ΠΎΠ³ΠΎ Π°Π²ΡΠΎΠΌΠ°ΡΠΈΠ·ΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠ³ΠΎ ΠΌΠΎΠ½ΠΈΡΠΎΡΠΈΠ½Π³Π° ΠΏΠΎΠ»ΠΎΠΌΠΎΠΊ ΡΠ΅Π·ΡΠΎΠ² Π½Π° ΡΠ΅ΠΆΡΡΠΈΡ
Π΄ΠΈΡΠΊΠ°Ρ
. ΠΠ° ΠΏΡΠΈΠΌΠ΅ΡΠ΅ ΠΊΠΎΠΌΠ±Π°ΠΉΠ½Π° Β«Π£Π½ΠΈΠ²Π΅ΡΡΠ°Π»-600Β» ΡΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ, ΡΡΠΎ Π½Π°ΠΈΠ±ΠΎΠ»Π΅Π΅ ΡΠ΄ΠΎΠ±Π½ΡΠΌ ΠΏΡΠΈ ΡΠ΅Π³ΠΈΡΡΡΠ°ΡΠΈΠΈ ΡΡΠΈΡ
ΠΊΠΎΠ»Π΅Π±Π°Π½ΠΈΠΉ Ρ ΠΏΠΎΠ·ΠΈΡΠΈΠΈ ΠΎΡΡΡΡΡΡΠ²ΠΈΡ Π½Π΅ΠΎΠ±Ρ
ΠΎΠ΄ΠΈΠΌΠΎΡΡΠΈ Π²Π²Π΅Π΄Π΅Π½ΠΈΡ Π² ΠΈΠ·ΠΌΠ΅ΡΠΈΡΠ΅Π»ΡΠ½ΡΠΉ ΡΡΠ°ΠΊΡ ΠΌΠΎΠ΄ΡΠ»Ρ ΠΏΠ΅ΡΠ΅Π΄Π°ΡΠΈ ΡΠΈΠ³Π½Π°Π»Π° Ρ Π²ΡΠ°ΡΠ°ΡΡΠΈΡ
ΡΡ ΡΠ°ΡΡΠ΅ΠΉ ΠΊΠΎΠΌΠ±Π°ΠΉΠ½Π° ΠΌΠΎΠΆΠ½ΠΎ ΡΡΠΈΡΠ°ΡΡ ΡΠ°Π·ΠΌΠ΅ΡΠ΅Π½ΠΈΠ΅ Π΄Π°ΡΡΠΈΠΊΠ° Π²ΠΈΠ±ΡΠ°ΡΠΈΠΈ Β Π½Π° ΠΊΠΎΡΠΏΡΡΠ΅ Π²Ρ
ΠΎΠ΄Π½ΠΎΠ³ΠΎ ΡΠ΅Π΄ΡΠΊΡΠΎΡΠ° ΠΏΡΠΈΠ²ΠΎΠ΄Π° ΠΈΡΠΏΠΎΠ»Π½ΠΈΡΠ΅Π»ΡΠ½ΠΎΠ³ΠΎ ΠΎΡΠ³Π°Π½Π° Ρ ΠΎΡΠΈΠ΅Π½ΡΠ°ΡΠΈΠ΅ΠΉ Π΅Π³ΠΎ Π² Π½Π°ΠΏΡΠ°Π²Π»Π΅Π½ΠΈΠΈ Π΄Π²ΠΈΠΆΠ΅Π½ΠΈΡ ΠΊΠΎΠΌΠ±Π°ΠΉΠ½Π°, Π³Π΄Π΅ ΠΊΠΎΠ»Π΅Π±Π°Π½ΠΈΡ ΡΠ°ΡΡΠΎΡΠΎΠΉ 5 ΠΡ ΡΠ²Π»ΡΡΡΡΡ ΠΏΡΠ΅Π²Π°Π»ΠΈΡΡΡΡΠΈΠΌΠΈ ΠΈ ΠΈΡ
Π΄ΠΎΡΡΠ°ΡΠΎΡΠ½ΠΎ ΠΏΡΠΎΡΡΠΎ Π²ΡΠ΄Π΅Π»ΠΈΡΡ ΠΈΠ· Π½ΠΈΠ·ΠΊΠΎΡΠ°ΡΡΠΎΡΠ½ΠΎΠ³ΠΎ Π΄ΠΈΠ°ΠΏΠ°Π·ΠΎΠ½Π° Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΡΡΠ°Π½Π΄Π°ΡΡΠΈΠ·ΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
Π½ΠΈΠ·ΠΊΠΎΡΠ°ΡΡΠΎΡΠ½ΡΡ
ΡΡΠ΅ΡΡΠΎΠΊΡΠ°Π²Π½ΡΡ
ΡΠΈΠ»ΡΡΡΠΎΠ². ΠΡΠ΅Π΄Π»ΠΎΠΆΠ΅Π½Π° ΠΌΠ΅ΡΠΎΠ΄ΠΈΠΊΠ° ΡΠΎΠ·Π΄Π°Π½ΠΈΡ ΡΠΈΡΡΠ΅ΠΌΡ Π°Π²ΡΠΎΠΌΠ°ΡΠΈΠ·ΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠ³ΠΎ ΠΌΠΎΠ±ΠΈΠ»ΡΠ½ΠΎΠ³ΠΎ ΠΌΠΎΠ½ΠΈΡΠΎΡΠΈΠ½Π³Π° ΠΏΠΎΠ»ΠΎΠΌΠΎΠΊ ΡΠ΅Π·ΡΠΎΠ² ΠΏΠΎ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠ°ΠΌ ΠΌΠ΅Ρ
Π°Π½ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΊΠΎΠ»Π΅Π±Π°Π½ΠΈΠΉ ΡΠ΅ΠΆΡΡΠΈΡ
Π΄ΠΈΡΠΊΠΎΠ² Ρ ΡΠΎΠ±ΡΡΠ²Π΅Π½Π½ΠΎΠΉ ΡΠ°ΡΡΠΎΡΠΎΠΉ
ΠΠΎΠ½ΠΈΡΠΎΡΠΈΠ½Π³ ΠΏΠΎΠ»ΠΎΠΌΠΎΠΊ ΡΠ΅Π·ΡΠΎΠ² ΠΈΡΠΏΠΎΠ»Π½ΠΈΡΠ΅Π»ΡΠ½ΠΎΠ³ΠΎ ΠΎΡΠ³Π°Π½Π° Π³ΠΎΡΠ½ΠΎΠ³ΠΎ ΠΊΠΎΠΌΠ±Π°ΠΉΠ½Π° ΠΏΠΎ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠ°ΠΌ ΠΌΠ΅Ρ Π°Π½ΠΈΡΠ΅ΡΠΊΠΈΡ ΠΊΠΎΠ»Π΅Π±Π°Π½ΠΈΠΉ. Π§Π°ΡΡΡ 1. ΠΠ΅ΡΠΎΠ΄ΠΈΠΊΠ° ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΉ
Vibromonitoring is the most methodologically developed and technically equipped with recording tools and data processing approach. However, in the sources of scientific and technical information about mining it is presented much less than other monitoring methods. One of the promising ways to solve this problem, in particular monitoring the breakage of cutting disc cutters of an executive body, is to use parameters of natural oscillations of the parts of gearboxes that occur during impulse loading due to such breakages. It should be noted that in the technically complex equipment of the mining industry, in particular in mining machines, there are many sources of vibration, the vibtaions of which are superimposed on each other. And it is not always possible to isolate and identify the required informative signal with the source. With this in mind the paper presents a research methodology on the possibility of monitoring the breakage of the executive body cutters on the example of the continuous miner βUniversal 600β according to the parameters of natural vibrations of the executive body cutting discs arising from the breakage of the cutters. The place of registration of these vibrations is determined β the gearbox handles, on the output shafts of which cutting discs are placed. The frequency of such vibrations is set equal to ~5 Hz. The possibility of using the AGAT-M vibration analyzer with M/AC102-1A vibration sensors as a means of further research has been substantiated in the paper. The paper considers an option of placing vibration sensors on non-rotating gear housings of the executive body drive. An algorithm for recording vibration parameters has been developed, which makes it possible to separate its sources.ΠΠΈΠ±ΡΠΎΠΌΠΎΠ½ΠΈΡΠΎΡΠΈΠ½Π³ β Π½Π°ΠΈΠ±ΠΎΠ»Π΅Π΅ ΠΌΠ΅ΡΠΎΠ΄ΠΈΡΠ΅ΡΠΊΠΈ ΡΠ°Π·Π²ΠΈΡΡΠΉ ΠΈ ΡΠ΅Ρ
Π½ΠΈΡΠ΅ΡΠΊΠΈ ΠΎΠ±Π΅ΡΠΏΠ΅ΡΠ΅Π½Π½ΡΠΉ ΡΡΠ΅Π΄ΡΡΠ²Π°ΠΌΠΈ ΡΠ΅Π³ΠΈΡΡΡΠ°ΡΠΈΠΈ ΠΈ ΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠΈ ΠΏΠΎΠ»ΡΡΠ΅Π½Π½ΡΡ
Π΄Π°Π½Π½ΡΡ
ΠΏΠΎΠ΄Ρ
ΠΎΠ΄. ΠΠ΄Π½Π°ΠΊΠΎ Π² ΠΈΡΡΠΎΡΠ½ΠΈΠΊΠ°Ρ
Π½Π°ΡΡΠ½ΠΎ-ΡΠ΅Ρ
Π½ΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΈΠ½ΡΠΎΡΠΌΠ°ΡΠΈΠΈ ΠΎ Π³ΠΎΡΠ½ΠΎΠΉ ΡΠ΅Ρ
Π½ΠΈΠΊΠ΅ ΠΎΠ½ ΠΏΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½ Π³ΠΎΡΠ°Π·Π΄ΠΎ ΡΠ΅ΠΆΠ΅, ΡΠ΅ΠΌ ΠΈΠ½ΡΠ΅ ΠΌΠ΅ΡΠΎΠ΄Ρ ΠΌΠΎΠ½ΠΈΡΠΎΡΠΈΠ½Π³Π°. ΠΠ΄ΠΈΠ½ ΠΈΠ· ΠΏΠ΅ΡΡΠΏΠ΅ΠΊΡΠΈΠ²Π½ΡΡ
ΠΏΡΡΠ΅ΠΉ ΡΠ΅ΡΠ΅Π½ΠΈΡ ΡΡΠΎΠΉ ΠΏΡΠΎΠ±Π»Π΅ΠΌΡ, Π² ΡΠ°ΡΡΠ½ΠΎΡΡΠΈ ΠΌΠΎΠ½ΠΈΡΠΎΡΠΈΠ½Π³Π° ΠΏΠΎΠ»ΠΎΠΌΠΎΠΊ ΡΠ΅Π·ΡΠΎΠ² ΡΠ΅ΠΆΡΡΠΈΡ
Π΄ΠΈΡΠΊΠΎΠ² ΠΈΡΠΏΠΎΠ»Π½ΠΈΡΠ΅Π»ΡΠ½ΡΡ
ΠΎΡΠ³Π°Π½ΠΎΠ², β ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΎΠ² ΡΠΎΠ±ΡΡΠ²Π΅Π½Π½ΡΡ
ΠΊΠΎΠ»Π΅Π±Π°Π½ΠΈΠΉ ΡΠ°ΡΡΠ΅ΠΉ ΡΠ΅Π΄ΡΠΊΡΠΎΡΠΎΠ², Π²ΠΎΠ·Π½ΠΈΠΊΠ°ΡΡΠΈΡ
ΠΏΡΠΈ ΠΈΠΌΠΏΡΠ»ΡΡΠ½ΠΎΠΌ Π½Π°Π³ΡΡΠΆΠ΅Π½ΠΈΠΈ, ΠΎΠ±ΡΡΠ»ΠΎΠ²Π»Π΅Π½Π½ΠΎΠΌ ΡΠ°ΠΊΠΈΠΌΠΈ ΠΏΠΎΠ»ΠΎΠΌΠΊΠ°ΠΌΠΈ. Π‘Π»Π΅Π΄ΡΠ΅Ρ ΠΎΡΠΌΠ΅ΡΠΈΡΡ, ΡΡΠΎ Π² ΡΠ΅Ρ
Π½ΠΈΡΠ΅ΡΠΊΠΈ ΡΠ»ΠΎΠΆΠ½ΠΎΠΌ ΠΎΠ±ΠΎΡΡΠ΄ΠΎΠ²Π°Π½ΠΈΠΈ Π³ΠΎΡΠ½ΠΎΠΉ ΠΎΡΡΠ°ΡΠ»ΠΈ, Π² ΡΠ°ΡΡΠ½ΠΎΡΡΠΈ Π² Π³ΠΎΡΠ½ΡΡ
ΠΊΠΎΠΌΠ±Π°ΠΉΠ½Π°Ρ
, ΡΡΡΠ΅ΡΡΠ²ΡΠ΅Ρ Π½Π΅ΠΌΠ°Π»ΠΎ ΠΈΡΡΠΎΡΠ½ΠΈΠΊΠΎΠ² Π²ΠΈΠ±ΡΠ°ΡΠΈΠΈ, ΠΊΠΎΠ»Π΅Π±Π°Π½ΠΈΡ ΠΊΠΎΡΠΎΡΡΡ
Π½Π°ΠΊΠ»Π°Π΄ΡΠ²Π°ΡΡΡΡ Π΄ΡΡΠ³ Π½Π° Π΄ΡΡΠ³Π°. Π Π½Π΅ Π²ΡΠ΅Π³Π΄Π° ΠΌΠΎΠΆΠ½ΠΎ Π²ΡΠ΄Π΅Π»ΠΈΡΡ ΠΈ ΠΈΠ΄Π΅Π½ΡΠΈΡΠΈΡΠΈΡΠΎΠ²Π°ΡΡ Ρ ΠΈΡΡΠΎΡΠ½ΠΈΠΊΠΎΠΌ ΡΡΠ΅Π±ΡΠ΅ΠΌΡΠΉ ΠΈΠ½ΡΠΎΡΠΌΠ°ΡΠΈΠ²Π½ΡΠΉ ΡΠΈΠ³Π½Π°Π». Π‘ ΡΡΠ΅ΡΠΎΠΌ ΡΡΠΎΠ³ΠΎ Π² ΡΡΠ°ΡΡΠ΅ ΠΏΡΠΈΠ²Π΅Π΄Π΅Π½Π° ΠΌΠ΅ΡΠΎΠ΄ΠΈΠΊΠ° ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΉ ΠΎ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡΠΈ ΠΌΠΎΠ½ΠΈΡΠΎΡΠΈΠ½Π³Π° ΠΏΠΎΠ»ΠΎΠΌΠΎΠΊ ΡΠ΅Π·ΡΠΎΠ² ΠΈΡΠΏΠΎΠ»Π½ΠΈΡΠ΅Π»ΡΠ½ΠΎΠ³ΠΎ ΠΎΡΠ³Π°Π½Π° Π½Π° ΠΏΡΠΈΠΌΠ΅ΡΠ΅ Π³ΠΎΡΠ½ΠΎΠ³ΠΎ ΠΊΠΎΠΌΠ±Π°ΠΉΠ½Π° Β«Π£Π½ΠΈΠ²Π΅ΡΡΠ°Π» 600Β» ΠΏΠΎ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠ°ΠΌ Π²ΠΎΠ·Π½ΠΈΠΊΠ°ΡΡΠΈΡ
ΠΏΡΠΈ ΠΏΠΎΠ»ΠΎΠΌΠΊΠ΅ ΡΠ΅Π·ΡΠΎΠ² ΡΠΎΠ±ΡΡΠ²Π΅Π½Π½ΡΡ
ΠΊΠΎΠ»Π΅Π±Π°Π½ΠΈΠΉ ΡΠ΅ΠΆΡΡΠΈΡ
Π΄ΠΈΡΠΊΠΎΠ² ΠΈΡΠΏΠΎΠ»Π½ΠΈΡΠ΅Π»ΡΠ½ΠΎΠ³ΠΎ ΠΎΡΠ³Π°Π½Π°. ΠΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΎ ΠΌΠ΅ΡΡΠΎ ΡΠ΅Π³ΠΈΡΡΡΠ°ΡΠΈΠΈ ΡΡΠΈΡ
ΠΊΠΎΠ»Π΅Π±Π°Π½ΠΈΠΉ β ΡΡΠΊΠΎΡΡΠΈ ΡΠ΅Π΄ΡΠΊΡΠΎΡΠ°, Π½Π° Π²ΡΡ
ΠΎΠ΄Π½ΡΡ
Π²Π°Π»Π°Ρ
ΠΊΠΎΡΠΎΡΡΡ
ΡΠ°Π·ΠΌΠ΅ΡΠ΅Π½Ρ ΡΠ΅ΠΆΡΡΠΈΠ΅ Π΄ΠΈΡΠΊΠΈ. Π£ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½Π° ΡΠ°ΡΡΠΎΡΠ° ΡΠ°ΠΊΠΈΡ
ΠΊΠΎΠ»Π΅Π±Π°Π½ΠΈΠΉ, ΡΠ°Π²Π½Π°Ρ ~5 ΠΡ. ΠΠ±ΠΎΡΠ½ΠΎΠ²Π°Π½Π° Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡΡ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΡ Π² ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ ΡΡΠ΅Π΄ΡΡΠ² Π΄Π°Π»ΡΠ½Π΅ΠΉΡΠΈΡ
ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΉ Π²ΠΈΠ±ΡΠΎΠ°Π½Π°Π»ΠΈΠ·Π°ΡΠΎΡΠ° Β«ΠΠΠΠ’-ΠΒ» Ρ Π΄Π°ΡΡΠΈΠΊΠ°ΠΌΠΈ Π²ΠΈΠ±ΡΠ°ΡΠΈΠΈ M/ΠΠ‘102-1Π. Π Π°ΡΡΠΌΠΎΡΡΠ΅Π½ Π²Π°ΡΠΈΠ°Π½Ρ ΡΠ°Π·ΠΌΠ΅ΡΠ΅Π½ΠΈΡ Π΄Π°ΡΡΠΈΠΊΠΎΠ² Π²ΠΈΠ±ΡΠ°ΡΠΈΠΈ Π½Π° Π½Π΅Π²ΡΠ°ΡΠ°ΡΡΠΈΡ
ΡΡ ΠΊΠΎΡΠΏΡΡΠ°Ρ
ΡΠ΅Π΄ΡΠΊΡΠΎΡΠΎΠ² ΠΏΡΠΈΠ²ΠΎΠ΄Π° ΠΈΡΠΏΠΎΠ»Π½ΠΈΡΠ΅Π»ΡΠ½ΠΎΠ³ΠΎ ΠΎΡΠ³Π°Π½Π°. Π Π°Π·ΡΠ°Π±ΠΎΡΠ°Π½ Π°Π»Π³ΠΎΡΠΈΡΠΌ ΡΠ΅Π³ΠΈΡΡΡΠ°ΡΠΈΠΈ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΎΠ² Π²ΠΈΠ±ΡΠ°ΡΠΈΠΈ, ΠΏΠΎΠ·Π²ΠΎΠ»ΡΡΡΠΈΠΉ ΡΠ°Π·Π΄Π΅Π»ΠΈΡΡ Π΅Π΅ ΠΈΡΡΠΎΡΠ½ΠΈΠΊΠΈ
ΠΠΠΠ«Π¨ΠΠΠΠ ΠΠ€Π€ΠΠΠ’ΠΠΠΠΠ‘Π’Π ΠΠ‘ΠΠΠΠ¬ΠΠΠΠΠΠΠ― ΠΠΠΠΠΠ ΠΠ‘Π’ΠΠΠΠΠ§ΠΠ‘ΠΠΠΠ ΠΠ ΠΠΠΠΠ― ΠΠ Π Π ΠΠΠΠ Π‘ΠΠΠ’ΠΠΠ ΠΠ ΠΠΠΠ‘Π’ΠΠΠ«
The paper presents a comparative analysis pertaining to cutting mono-crystal silicon by a diamond wheel with internal cutting-edge (DWIC) and a multi-stranded tool. It has been shown that in accordance to the output percentage of good plates usage of multi-stranded cutting method is on a par with DWIC; and in accordance to an actual consumption of silicon per one plate the first method exceeds the wheel cutting method. The process of multi-stranded cutting method is characterized by high accuracy, reproducibility, productivity and ensures significant saving of high-priced mono-crystal silicon.ΠΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½Ρ ΡΡΠ°Π²Π½ΠΈΡΠ΅Π»ΡΠ½ΡΠ΅ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΡ ΡΠ΅Π·ΠΊΠΈ ΠΌΠΎΠ½ΠΎΠΊΡΠΈΡΡΠ°Π»Π»ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΊΡΠ΅ΠΌΠ½ΠΈΡ Π°Π»ΠΌΠ°Π·Π½ΡΠΌ ΠΊΡΡΠ³ΠΎΠΌ Ρ Π²Π½ΡΡΡΠ΅Π½Π½Π΅ΠΉ ΡΠ΅ΠΆΡΡΠ΅ΠΉ ΠΊΡΠΎΠΌΠΊΠΎΠΉ (ΠΠΠΠ ) ΠΈΒ ΠΌΠ½ΠΎΠ³ΠΎΠΏΡΠΎΠ²ΠΎΠ»ΠΎΡΠ½ΠΎΠΉ ΡΠ΅Π·ΠΊΠΈ. ΠΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΡΠΎ ΠΏΠΎ ΠΏΡΠΎΡΠ΅Π½ΡΡ Π²ΡΡ
ΠΎΠ΄Π° Π³ΠΎΠ΄Π½ΡΡ
ΠΏΠ»Π°ΡΡΠΈΠ½ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ ΠΌΠ΅ΡΠΎΠ΄Π° ΠΌΠ½ΠΎΠ³ΠΎΠΏΡΠΎΠ²ΠΎΠ»ΠΎΡΠ½ΠΎΠΉ ΡΠ΅Π·ΠΊΠΈ Π½Π΅ ΡΡΡΡΠΏΠ°Π΅Ρ ΠΌΠ΅ΡΠΎΠ΄Ρ ΡΠ΅Π·ΠΊΠΈ ΠΊΡΡΠ³Π°ΠΌΠΈ ΠΠΠΠ , Π° ΠΏΠΎ ΡΠ°ΠΊΡΠΈΡΠ΅ΡΠΊΠΎΠΌΡ ΡΠ°ΡΡ
ΠΎΠ΄Ρ ΠΊΡΠ΅ΠΌΠ½ΠΈΡ Π½Π° ΠΎΠ΄Π½Ρ ΠΏΠ»Π°ΡΡΠΈΠ½Ρ ΠΏΡΠ΅Π²ΠΎΡΡ
ΠΎΠ΄ΠΈΡ ΠΌΠ΅ΡΠΎΠ΄ Π΄ΠΈΡΠΊΠΎΠ²ΠΎΠΉ ΡΠ΅Π·ΠΊΠΈ. ΠΡΠΎΡΠ΅ΡΡ ΠΌΠ½ΠΎΠ³ΠΎΠΏΡΠΎΠ²ΠΎΠ»ΠΎΡΠ½ΠΎΠΉ ΡΠ΅Π·ΠΊΠΈ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΠ·ΡΠ΅ΡΡΡ Π²ΡΡΠΎΠΊΠΎΠΉ ΡΠΎΡΠ½ΠΎΡΡΡΡ, Π²ΠΎΡΠΏΡΠΎΠΈΠ·Π²ΠΎΠ΄ΠΈΠΌΠΎΡΡΡΡ, ΠΏΡΠΎΠΈΠ·Π²ΠΎΠ΄ΠΈΡΠ΅Π»ΡΠ½ΠΎΡΡΡΡ ΠΈ ΠΎΠ±Π΅ΡΠΏΠ΅ΡΠΈΠ²Π°Π΅Ρ ΡΡΡΠ΅ΡΡΠ²Π΅Π½Π½ΡΡ ΡΠΊΠΎΠ½ΠΎΠΌΠΈΡ Π΄ΠΎΡΠΎΠ³ΠΎΡΡΠΎΡΡΠ΅Π³ΠΎ ΠΌΠΎΠ½ΠΎΠΊΡΠΈΡΡΠ°Π»Π»ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΊΡΠ΅ΠΌΠ½ΠΈΡ.
ΠΠΠΠΠΠΠ’Π ΠΠ§ΠΠ‘ΠΠΠ Π₯ΠΠ ΠΠΠ’ΠΠ ΠΠ‘Π’ΠΠΠ ΠΠΠΠΠΠ ΠΠ‘Π’ΠΠΠΠΠ TlGaS2, ΠΠΠΠΠ ΠΠΠΠΠΠ«Π₯ Π‘ΠΎ ΠΈ Yb
Electrical conductivity and dielectric properties of TlGaS2, TlGa0,999Yb0,001S2 and TlGa0,99 Co0,01S2 Β single crystals are investigated in the temperature range 150β320 K at the measuring field frequencies of 103 β106 Hz. The values of generalized activation energy of charge carriers in these crystals are determined. It is shown that the absolute values of the characteristics studied increase with temperature. The temperature dependences of the dielectric constant of these crystals have revealed the anomalies in the form of wide peaks, indicating the presence of their structural changes at temperatures ~ 170β250 K. The dispersion of the dielectric properties of the single crystals under study is seen: with a frequency growth the dielectric constant values decrease, and electrical conductivity values increase. It is found that the cobalt and ytterbium doping of TlGaS2 crystals decrease permittivity values and increase electrical conductivity values.ΠΡΠΎΠ²Π΅Π΄Π΅Π½Ρ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΡΠ»Π΅ΠΊΡΡΠΎΠΏΡΠΎΠ²ΠΎΠ΄Π½ΠΎΡΡΠΈ ΠΈ Π΄ΠΈΡΠ»Π΅ΠΊΡΡΠΈΡΠ΅ΡΠΊΠΈΡ
Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊ ΠΌΠΎΠ½ΠΎΠΊΡΠΈΡΡΠ°Π»Π»ΠΎΠ² TlGaS2, TlGa0,999Yb0,001S2 ΠΈ TlGa0,99 Co0,01S2 Π² ΠΈΠ½ΡΠ΅ΡΠ²Π°Π»Π΅ ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡ 150β320 Π Π½Π° ΡΠ°ΡΡΠΎΡΠ°Ρ
ΠΈΠ·ΠΌΠ΅ΡΠΈΡΠ΅Π»ΡΠ½ΠΎΠ³ΠΎ ΠΏΠΎΠ»Ρ 103 β106 ΠΡ. ΠΠΏΡΠ΅Π΄Π΅Π»Π΅Π½Ρ Π·Π½Π°ΡΠ΅Π½ΠΈΡ ΠΎΠ±ΠΎΠ±ΡΠ΅Π½Π½ΠΎΠΉ ΡΠ½Π΅ΡΠ³ΠΈΠΈ Π°ΠΊΡΠΈΠ²Π°ΡΠΈΠΈ ΠΎΡΠ½ΠΎΠ²Π½ΡΡ
Π½ΠΎΡΠΈΡΠ΅Π»Π΅ΠΉ Π·Π°ΡΡΠ΄Π° Π² ΡΡΠΈΡ
ΠΊΡΠΈΡΡΠ°Π»Π»Π°Ρ
. ΠΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΡΠΎ Π°Π±ΡΠΎΠ»ΡΡΠ½ΡΠ΅ Π·Π½Π°ΡΠ΅Π½ΠΈΡ ΠΈΠ·ΡΡΠ΅Π½Π½ΡΡ
Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊ Π²ΠΎΠ·ΡΠ°ΡΡΠ°ΡΡ ΠΏΡΠΈ ΡΠ²Π΅Π»ΠΈΡΠ΅Π½ΠΈΠΈ ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΡ. ΠΠ° ΠΊΡΠΈΠ²ΡΡ
ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΠ½ΠΎΠΉ Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡΠΈ Π΄ΠΈΡΠ»Π΅ΠΊΡΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΏΡΠΎΠ½ΠΈΡΠ°Π΅ΠΌΠΎΡΡΠΈ ΠΈΡΡΠ»Π΅Π΄ΡΠ΅ΠΌΡΡ
ΠΊΡΠΈΡΡΠ°Π»Π»ΠΎΠ² ΠΎΠ±Π½Π°ΡΡΠΆΠ΅Π½Ρ Π°Π½ΠΎΠΌΠ°Π»ΠΈΠΈ Π² Π²ΠΈΠ΄Π΅ ΡΠΈΡΠΎΠΊΠΈΡ
ΠΌΠ°ΠΊΡΠΈΠΌΡΠΌΠΎΠ², ΡΠ²ΠΈΠ΄Π΅ΡΠ΅Π»ΡΡΡΠ²ΡΡΡΠΈΠ΅ ΠΎ Π½Π°Π»ΠΈΡΠΈΠΈ ΡΡΡΡΠΊΡΡΡΠ½ΡΡ
ΠΏΡΠ΅Π²ΡΠ°ΡΠ΅Π½ΠΈΠΉ Π² Π½ΠΈΡ
Π² ΠΎΠ±Π»Π°ΡΡΠΈ ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡ ~ 170β250 Π. ΠΡΡΠ²Π»Π΅Π½Π° Π΄ΠΈΡΠΏΠ΅ΡΡΠΈΡ Π΄ΠΈΡΠ»Π΅ΠΊΡΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠ²ΠΎΠΉΡΡΠ² ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½Π½ΡΡ
ΠΌΠΎΠ½ΠΎΠΊΡΠΈΡΡΠ°Π»Π»ΠΎΠ²: Ρ ΡΠΎΡΡΠΎΠΌ ΡΠ°ΡΡΠΎΡΡ Π·Π½Π°ΡΠ΅Π½ΠΈΡ Π΄ΠΈΡΠ»Π΅ΠΊΡΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΏΡΠΎΠ½ΠΈΡΠ°Π΅ΠΌΠΎΡΡΠΈ ΡΠΌΠ΅Π½ΡΡΠ°ΡΡΡΡ, Π° ΡΠ΄Π΅Π»ΡΠ½ΠΎΠΉ ΡΠ»Π΅ΠΊΡΡΠΎΠΏΡΠΎΠ²ΠΎΠ΄Π½ΠΎΡΡΠΈ β ΡΠ²Π΅Π»ΠΈΡΠΈΠ²Π°ΡΡΡΡ. ΠΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΡΠΎ Π»Π΅Π³ΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ ΠΊΡΠΈΡΡΠ°Π»Π»ΠΎΠ² TlGaS2 ΠΊΠΎΠ±Π°Π»ΡΡΠΎΠΌ ΠΈ ΠΈΡΡΠ΅ΡΠ±ΠΈΠ΅ΠΌ ΠΏΡΠΈΠ²ΠΎΠ΄ΠΈΡ ΠΊ ΡΠΌΠ΅Π½ΡΡΠ΅Π½ΠΈΡ Π·Π½Π°ΡΠ΅Π½ΠΈΠΉ Π΄ΠΈΡΠ»Π΅ΠΊΡΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΏΡΠΎΠ½ΠΈΡΠ°Π΅ΠΌΠΎΡΡΠΈ ΠΈ ΡΠ²Π΅Π»ΠΈΡΠ΅Π½ΠΈΡ Π·Π½Π°ΡΠ΅Π½ΠΈΠΉ ΡΠ»Π΅ΠΊΡΡΠΎΠΏΡΠΎΠ²ΠΎΠ΄Π½ΠΎΡΡΠΈ
Π‘ΡΡΡΠΊΡΡΡΠ° ΠΈ ΡΡΠΈΠ±ΠΎΡΠ΅Ρ Π½ΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΡΠ²ΠΎΠΉΡΡΠ²Π° Ρ ΡΠΎΠΌΠΎΠ²ΡΡ ΠΏΠΎΠΊΡΡΡΠΈΠΉ, ΡΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½Π½ΡΡ ΡΠ»Π΅ΠΊΡΡΠΎΠ΄Π΅ΡΠΎΡΠΌΠ°ΡΠΈΠΎΠ½Π½ΡΠΌ ΠΏΠ»Π°ΠΊΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ Π³ΠΈΠ±ΠΊΠΈΠΌ ΠΈΠ½ΡΡΡΡΠΌΠ΅Π½ΡΠΎΠΌ
The paper contains results of investigations on structure and tribotechnical properties of chromium coatings formed by a method of electrodeformation cladding with flexible tools (EDCFT). The purpose of these investigations is to assess prospects for application of the coatings as an alternative to galvanic chrome plating which is widely used in manufacturing hydraulic cylinder rods of metal-cutting machines. Rotary metal brushes with a wire pile made of 65Π-steel and 03Π₯17Π14Π2-stainless steel have been used as a flexible tool. A compacted bar obtained by sintering a mixture of pure chromium powders and a nano-sized diamond-graphite blend UDDG has been employed as a donor material for EDCFT. According to results of the research it has been established that alloying elements of wire pile such as chromium and nickel are added to a coating composition while forming coatings a stainless steel brush. So in the case of using brushes with wire pile of 03X17H14M2-stainless steel the amount of chromium and nickel in a clad coating layer is 5.3 and 9.6 times higher in percentage, respectively, in comparison with the coating formed by a 65Π-steel brush that can contribute to improvement of coating corrosion resistance. At the same time, surface relief of the coating has a developed rough structure consisting of chromium microparticles having various size that are tightly packed and elongated in the direction of brush rotation and there are no flaws in the form of discontinuities and delaminations. Tribological tests have been performed under conditions of βboundary lubricationβ on a rotary friction machine that implements friction of a rubber indenter on a flat surface of a rotating disk. According to data of the tribotechnical tests it has been ascertained that under conditions of βboundary frictionβ for such paired samples as βcoated disc β rubber rollerβ chromium coatings formed by the EDCFT method, have the lowest values of a sliding friction coefficient (fΡΡΒ = 0.023) which are 7.5 times lower than chromium coatings obtained by electroplating. At the same time the wear of rubber rollers in pairs with electroplated chromium coatings has turned out to be less than in pairs with the coating formed by the EDCFT method..Β ΠΡΠΈΠ²Π΅Π΄Π΅Π½Ρ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΉ ΡΡΡΡΠΊΡΡΡΡ ΠΈ ΡΡΠΈΠ±ΠΎΡΠ΅Ρ
Π½ΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠ²ΠΎΠΉΡΡΠ² Ρ
ΡΠΎΠΌΠΎΠ²ΡΡ
ΠΏΠΎΠΊΡΡΡΠΈΠΉ, ΡΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ ΡΠ»Π΅ΠΊΡΡΠΎΠ΄Π΅ΡΠΎΡΠΌΠ°ΡΠΈΠΎΠ½Π½ΠΎΠ³ΠΎ ΠΏΠ»Π°ΠΊΠΈΡΠΎΠ²Π°Π½ΠΈΡ Π³ΠΈΠ±ΠΊΠΈΠΌ ΠΈΠ½ΡΡΡΡΠΌΠ΅Π½ΡΠΎΠΌ (ΠΠΠΠΠ), Π²ΡΠΏΠΎΠ»Π½Π΅Π½Π½ΡΡ
Ρ ΡΠ΅Π»ΡΡ ΠΎΡΠ΅Π½ΠΊΠΈ ΠΏΠ΅ΡΡΠΏΠ΅ΠΊΡΠΈΠ² ΠΈΡ
ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΡ Π² ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ Π°Π»ΡΡΠ΅ΡΠ½Π°ΡΠΈΠ²Ρ Π³Π°Π»ΡΠ²Π°Π½ΠΈΡΠ΅ΡΠΊΠΎΠΌΡ Ρ
ΡΠΎΠΌΠΈΡΠΎΠ²Π°Π½ΠΈΡ, ΡΠΈΡΠΎΠΊΠΎ ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΠ΅ΠΌΠΎΠΌΡ ΠΏΡΠΈ ΠΈΠ·Π³ΠΎΡΠΎΠ²Π»Π΅Π½ΠΈΠΈ ΡΡΠΎΠΊΠΎΠ² Π³ΠΈΠ΄ΡΠΎΡΠΈΠ»ΠΈΠ½Π΄ΡΠΎΠ² ΠΌΠ΅ΡΠ°Π»Π»ΠΎΡΠ΅ΠΆΡΡΠΈΡ
ΡΡΠ°Π½ΠΊΠΎΠ². Π ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ Π³ΠΈΠ±ΠΊΠΎΠ³ΠΎ ΠΈΠ½ΡΡΡΡΠΌΠ΅Π½ΡΠ° ΠΏΡΠΈΠΌΠ΅Π½ΡΠ»ΠΈΡΡ Π²ΡΠ°ΡΠ°ΡΡΠΈΠ΅ΡΡ ΠΌΠ΅ΡΠ°Π»Π»ΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΡΠ΅ΡΠΊΠΈ Ρ ΠΏΡΠΎΠ²ΠΎΠ»ΠΎΡΠ½ΡΠΌ Π²ΠΎΡΡΠΎΠΌ, Π²ΡΠΏΠΎΠ»Π½Π΅Π½Π½ΡΠΌ ΠΈΠ· ΡΡΠ°Π»ΠΈ 65Π ΠΈ Π½Π΅ΡΠΆΠ°Π²Π΅ΡΡΠ΅ΠΉ ΡΡΠ°Π»ΠΈ 03Π₯17Π14Π2. ΠΠ°ΡΠ΅ΡΠΈΠ°Π»-Π΄ΠΎΠ½ΠΎΡ ΠΏΡΠΈ ΠΠΠΠΠ β ΠΊΠΎΠΌΠΏΠ°ΠΊΡΠΈΡΠΎΠ²Π°Π½Π½ΡΠΉ Π±ΡΡΡΠΎΠΊ, ΠΏΠΎΠ»ΡΡΠ΅Π½Π½ΡΠΉ ΠΏΡΡΠ΅ΠΌ ΡΠΏΠ΅ΠΊΠ°Π½ΠΈΡ ΡΠΌΠ΅ΡΠΈ ΠΏΠΎΡΠΎΡΠΊΠΎΠ² ΡΠΈΡΡΠΎΠ³ΠΎ Ρ
ΡΠΎΠΌΠ° ΠΈ Π½Π°Π½ΠΎΡΠ°Π·ΠΌΠ΅ΡΠ½ΠΎΠΉ Π°Π»ΠΌΠ°Π·Π½ΠΎ-Π³ΡΠ°ΡΠΈΡΠΎΠ²ΠΎΠΉ ΡΠΈΡ
ΡΡ Π£ΠΠΠ. ΠΠΎ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠ°ΠΌ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΉ ΡΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ, ΡΡΠΎ ΠΏΡΠΈ ΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½ΠΈΠΈ ΠΏΠΎΠΊΡΡΡΠΈΠΉ ΡΠ΅ΡΠΊΠΎΠΉ ΠΈΠ· Π½Π΅ΡΠΆΠ°Π²Π΅ΡΡΠ΅ΠΉ ΡΡΠ°Π»ΠΈ Π² ΡΠΎΡΡΠ°Π² ΠΏΠΎΠΊΡΡΡΠΈΡ ΠΏΡΠΈΠ²Π½ΠΎΡΡΡΡΡ Π»Π΅Π³ΠΈΡΡΡΡΠΈΠ΅ ΡΠ»Π΅ΠΌΠ΅Π½ΡΡ ΠΏΡΠΎΠ²ΠΎΠ»ΠΎΡΠ½ΠΎΠ³ΠΎ Π²ΠΎΡΡΠ°, ΡΠ°ΠΊΠΈΠ΅ ΠΊΠ°ΠΊ Ρ
ΡΠΎΠΌ ΠΈ Π½ΠΈΠΊΠ΅Π»Ρ. Π’Π°ΠΊ, Π² ΡΠ»ΡΡΠ°Π΅ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΡ ΡΠ΅ΡΠΎΠΊ Ρ ΠΏΡΠΎΠ²ΠΎΠ»ΠΎΡΠ½ΡΠΌ Π²ΠΎΡΡΠΎΠΌ ΠΈΠ· Π½Π΅ΡΠΆΠ°Π²Π΅ΡΡΠ΅ΠΉ ΡΡΠ°Π»ΠΈ 03Π₯17Π14Π2 ΠΊΠΎΠ»ΠΈΡΠ΅ΡΡΠ²ΠΎ Ρ
ΡΠΎΠΌΠ° ΠΈ Π½ΠΈΠΊΠ΅Π»Ρ Π² ΠΏΠ»Π°ΠΊΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠΌ ΡΠ»ΠΎΠ΅ ΠΏΠΎΠΊΡΡΡΠΈΡ ΠΏΠΎ ΠΏΡΠΎΡΠ΅Π½ΡΠ½ΠΎΠΌΡ ΡΠΎΠ΄Π΅ΡΠΆΠ°Π½ΠΈΡ ΡΠΎΠΎΡΠ²Π΅ΡΡΡΠ²Π΅Π½Π½ΠΎ Π² 5,3 ΠΈ 9,6 ΡΠ°Π·Π° Π±ΠΎΠ»ΡΡΠ΅, ΡΠ΅ΠΌ Π² ΠΏΠΎΠΊΡΡΡΠΈΠΈ, ΡΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠΌ ΡΠ΅ΡΠΊΠΎΠΉ ΠΈΠ· ΡΡΠ°Π»ΠΈ 65Π, ΡΡΠΎ ΠΌΠΎΠΆΠ΅Ρ ΡΠΏΠΎΡΠΎΠ±ΡΡΠ²ΠΎΠ²Π°ΡΡ ΠΏΠΎΠ²ΡΡΠ΅Π½ΠΈΡ ΠΊΠΎΡΡΠΎΠ·ΠΈΠΎΠ½Π½ΠΎΠΉ ΡΡΠΎΠΉΠΊΠΎΡΡΠΈ ΠΏΠΎΠΊΡΡΡΠΈΠΉ. ΠΡΠΈ ΡΡΠΎΠΌ ΡΠ΅Π»ΡΠ΅Ρ ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠΈ ΠΏΠΎΠΊΡΡΡΠΈΡ ΠΈΠΌΠ΅Π΅Ρ ΡΠ°Π·Π²ΠΈΡΡΡ ΡΠ΅ΡΠΎΡ
ΠΎΠ²Π°ΡΡΡ ΡΡΡΡΠΊΡΡΡΡ, ΡΠΎΡΡΠΎΡΡΡΡ ΠΈΠ· ΠΏΠ»ΠΎΡΠ½ΠΎ ΡΠ»ΠΎΠΆΠ΅Π½Π½ΡΡ
ΠΈ Π²ΡΡΡΠ½ΡΡΡΡ
Π² Π½Π°ΠΏΡΠ°Π²Π»Π΅Π½ΠΈΠΈ Π²ΡΠ°ΡΠ΅Π½ΠΈΡ ΡΠ΅ΡΠΊΠΈ ΡΠ°Π·Π»ΠΈΡΠ½ΡΡ
ΠΏΠΎ ΡΠ°Π·ΠΌΠ΅ΡΠ°ΠΌ ΠΌΠΈΠΊΡΠΎΡΠ°ΡΡΠΈΡ Ρ
ΡΠΎΠΌΠ°, Π° ΡΠ°ΠΊΠΆΠ΅ ΡΠ³Π»Π°ΠΆΠ΅Π½Π½ΡΡ
ΠΌΠΈΠΊΡΠΎΠ²ΡΡΡΡΠΏΠΎΠ² ΠΈ ΠΌΠΈΠΊΡΠΎΡΠ³Π»ΡΠ±Π»Π΅Π½ΠΈΠΉ, Π΄Π΅ΡΠ΅ΠΊΡΡ ΠΏΠΎΠΊΡΡΡΠΈΡ Π² Π²ΠΈΠ΄Π΅ Π½Π΅ΡΠΏΠ»ΠΎΡΠ½ΠΎΡΡΠ΅ΠΉ ΠΈ ΠΎΡΡΠ»ΠΎΠ΅Π½ΠΈΠΉ ΠΎΡΡΡΡΡΡΠ²ΡΡΡ. Π’ΡΠΈΠ±ΠΎΡΠ΅Ρ
Π½ΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΠΈΡΠΏΡΡΠ°Π½ΠΈΡ Π²ΡΠΏΠΎΠ»Π½ΡΠ»ΠΈΡΡ Π² ΡΡΠ»ΠΎΠ²ΠΈΡΡ
Β«Π³ΡΠ°Π½ΠΈΡΠ½ΠΎΠΉ ΡΠΌΠ°Π·ΠΊΠΈΒ» Π½Π° ΠΌΠ°ΡΠΈΠ½Π΅ ΡΡΠ΅Π½ΠΈΡ Π²ΡΠ°ΡΠ°ΡΠ΅Π»ΡΠ½ΠΎΠ³ΠΎ ΡΠΈΠΏΠ°, ΡΠ΅Π°Π»ΠΈΠ·ΡΡΡΠ΅ΠΉ ΡΡΠ΅Π½ΠΈΠ΅ ΡΠ΅Π·ΠΈΠ½ΠΎΠ²ΠΎΠ³ΠΎ ΠΈΠ½Π΄Π΅Π½ΡΠΎΡΠ° ΠΏΠΎ ΠΏΠ»ΠΎΡΠΊΠΎΠΉ ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠΈ Π²ΡΠ°ΡΠ°ΡΡΠ΅Π³ΠΎΡΡ Π΄ΠΈΡΠΊΠ°. ΠΠΎ Π΄Π°Π½Π½ΡΠΌ ΡΡΠΈΠ±ΠΎΡΠ΅Ρ
Π½ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΈΡΠΏΡΡΠ°Π½ΠΈΠΉ ΡΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ, ΡΡΠΎ Π² ΡΡΠ»ΠΎΠ²ΠΈΡΡ
Β«Π³ΡΠ°Π½ΠΈΡΠ½ΠΎΠ³ΠΎ ΡΡΠ΅Π½ΠΈΡΒ» ΡΠΏΠ°ΡΠ΅Π½Π½ΡΡ
ΠΎΠ±ΡΠ°Π·ΡΠΎΠ² Β«Π΄ΠΈΡΠΊ Ρ ΠΏΠΎΠΊΡΡΡΠΈΠ΅ΠΌ β ΡΠ΅Π·ΠΈΠ½ΠΎΠ²ΡΠΉ ΡΠΎΠ»ΠΈΠΊΒ» Π½Π°ΠΈΠΌΠ΅Π½ΡΡΠΈΠΌΠΈ Π·Π½Π°ΡΠ΅Π½ΠΈΡΠΌΠΈ Π²Π΅Π»ΠΈΡΠΈΠ½ ΠΊΠΎΡΡΡΠΈΡΠΈΠ΅Π½ΡΠ° ΡΡΠ΅Π½ΠΈΡ ΡΠΊΠΎΠ»ΡΠΆΠ΅Π½ΠΈΡ (fΡΡΒ = 0,023) ΠΎΠ±Π»Π°Π΄Π°ΡΡ Ρ
ΡΠΎΠΌΠΎΠ²ΡΠ΅ ΠΏΠΎΠΊΡΡΡΠΈΡ, ΡΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½Π½ΡΠ΅ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ ΠΠΠΠΠ, ΠΊΠΎΡΠΎΡΡΠ΅ Π² 7,5 ΡΠ°Π·Π° ΠΌΠ΅Π½ΡΡΠ΅, ΡΠ΅ΠΌ Ρ Ρ
ΡΠΎΠΌΠΎΠ²ΡΡ
, ΠΏΠΎΠ»ΡΡΠ΅Π½Π½ΡΡ
Π³Π°Π»ΡΠ²Π°Π½ΠΈΡΠ΅ΡΠΊΠΈΠΌ ΠΎΡΠ°ΠΆΠ΄Π΅Π½ΠΈΠ΅ΠΌ. Π ΡΠΎ ΠΆΠ΅ Π²ΡΠ΅ΠΌΡ ΠΈΠ·Π½ΠΎΡ ΡΠ΅Π·ΠΈΠ½ΠΎΠ²ΡΡ
ΡΠΎΠ»ΠΈΠΊΠΎΠ² Π² ΠΏΠ°ΡΠ°Ρ
Ρ Π³Π°Π»ΡΠ²Π°Π½ΠΈΡΠ΅ΡΠΊΠΈΠΌΠΈ Ρ
ΡΠΎΠΌΠΎΠ²ΡΠΌΠΈ ΠΏΠΎΠΊΡΡΡΠΈΡΠΌΠΈ ΠΎΠΊΠ°Π·ΡΠ²Π°Π»ΡΡ ΠΌΠ΅Π½ΡΡΠΈΠΌ, ΡΠ΅ΠΌ Π² ΠΏΠ°ΡΠ°Ρ
Ρ ΠΏΠΎΠΊΡΡΡΠΈΠ΅ΠΌ, ΡΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½Π½ΡΠΌ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ ΠΠΠΠΠ
Pharmacological Effects of Asiatic acid in Glioblastoma Cells under Hypoxia
Glioblastoma multiforme (GBM) is the most common and malignant primary brain tumor in adults. Despite current treatment options including surgery followed by radiation and chemotherapy with temozolomide (TMZ) and cisplatin, the median survival rate remains low (<16 months). Combined with increasing drug resistance and the inability of some compounds to cross the blood brain barrier (BBB), novel compounds are being sought for the treatment of this disease. Here, we aimed to examine the pharmacological effect of Asiatic acid (AA) in glioblastoma under hypoxia.
To investigate the effects of AA on cell viability, proliferation, apoptosis and wound healing, SVG p12 fetal glia and U87-MG grade IV glioblastoma cells were cultured under normoxic (21% O2) and hypoxic (1% O2) conditions.
In normoxia, AA reduced cell viability in U87-MG cells in a time and concentration-dependent manner. A significant decrease in viability, compared to cisplatin, was observed following 2hrs of AA treatment with no significant changes in cell proliferation or cell cycle progression observed. Under hypoxia, a significantly greater number of cells underwent apoptosis in comparison to cisplatin. While cisplatin showed a reduction in wound healing in normoxia, a significantly greater reduction was observed following AA treatment. An overall reduction in wound healing was observed under hypoxia.
The results of this study show that AA has cytotoxic effects on glioma cell lines and has the potential to become an alternative treatment for glioblastoma
ΠΠΠΠ£Π§ΠΠΠΠ Π Π ΠΠΠ’ΠΠΠΠΠΠ ΠΠ€ΠΠ§ΠΠ‘ΠΠΠ ΠΠ‘Π‘ΠΠΠΠΠΠΠΠΠ― Π’ΠΠΠ ΠΠ«Π₯ Π ΠΠ‘Π’ΠΠΠ ΠΠ Cu2CdSn(SxSe1βx)4
The quaternary semiconductors Cu2CdSnS4, Cu2CdSnSe4 and Cu2CdSn(SxSe1βx)4 solid solutions were synthesized by the one-temperature method from the elementary components. The X-ray diffraction method showed that the obtained polycrystalline samples are single-phased. The unit cell parameters of the synthesized compounds and Cu2CdSn(SxSe1βx)4 solid solutions were determined from diffraction spectra by the full-profile analysis using the Rietveld method with the Fullprof software package. It has been established that with an increase in sulfur concentration, the unit cell parameters decrease smoothly linearly in accordance with the Vegard rule, which indicates the formation of a continuous series of solid solutions in the Cu2CdSn(SxSe1βx)4 system within the range 0 β€ x β€ 1. The parameter of crystal lattice tetragonal distortions h of the investigated compounds is calculated. The h values are close to 1 for all the compositions studied, which indicates a small crystal lattice distortion of the obtained samples.ΠΠ΅ΡΠΎΠ΄ΠΎΠΌ ΠΎΠ΄Π½ΠΎΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΠ½ΠΎΠ³ΠΎ ΡΠΈΠ½ΡΠ΅Π·Π° ΠΈΠ· ΡΠ»Π΅ΠΌΠ΅Π½ΡΠ°ΡΠ½ΡΡ
ΠΊΠΎΠΌΠΏΠΎΠ½Π΅Π½ΡΠΎΠ² ΡΠΈΠ½ΡΠ΅Π·ΠΈΡΠΎΠ²Π°Π½Ρ ΡΠ΅ΡΠ²Π΅ΡΠ½ΡΠ΅ ΠΏΠΎΠ»ΡΠΏΡΠΎΠ²ΠΎΠ΄Π½ΠΈΠΊΠΎΠ²ΡΠ΅ ΡΠΎΠ΅Π΄ΠΈΠ½Π΅Π½ΠΈΡ Cu2CdSnS4, Cu2CdSnSe4 ΠΈ ΡΠ²Π΅ΡΠ΄ΡΠ΅ ΡΠ°ΡΡΠ²ΠΎΡΡ Cu2CdSn(SxSe1βx)4. Π Π΅Π½ΡΠ³Π΅Π½ΠΎΠ³ΡΠ°ΡΠΈΡΠ΅ΡΠΊΠΈΠΌ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ ΠΏΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΡΠΎ ΠΏΠΎΠ»ΡΡΠ΅Π½Π½ΡΠ΅ ΠΏΠΎΠ»ΠΈΠΊΡΠΈΡΡΠ°Π»Π»ΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΠΎΠ±ΡΠ°Π·ΡΡ ΡΠ²Π»ΡΡΡΡΡ ΠΎΠ΄Π½ΠΎΡΠ°Π·Π½ΡΠΌΠΈ. ΠΠ· Π΄ΠΈΡΡΠ°ΠΊΡΠΈΠΎΠ½Π½ΡΡ
ΡΠΏΠ΅ΠΊΡΡΠΎΠ² ΠΏΠΎΠ»Π½ΠΎΠΏΡΠΎΡΠΈΠ»ΡΠ½ΡΠΌ Π°Π½Π°Π»ΠΈΠ·ΠΎΠΌ ΠΏΠΎ ΠΌΠ΅ΡΠΎΠ΄Ρ Π ΠΈΡΠ²Π΅Π»ΡΠ΄Π° Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΠΏΡΠΎΠ³ΡΠ°ΠΌΠΌΠ½ΠΎΠ³ΠΎ ΠΏΠ°ΠΊΠ΅ΡΠ° Fullprof ΠΎΠΏΡΠ΅- Π΄Π΅Π»Π΅Π½Ρ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΡ ΡΠ»Π΅ΠΌΠ΅Π½ΡΠ°ΡΠ½ΠΎΠΉ ΡΡΠ΅ΠΉΠΊΠΈ ΡΠΈΠ½ΡΠ΅Π·ΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
ΡΠΎΠ΅Π΄ΠΈΠ½Π΅Π½ΠΈΠΉ ΠΈ ΡΠ²Π΅ΡΠ΄ΡΡ
ΡΠ°ΡΡΠ²ΠΎΡΠΎΠ² Cu2CdSn(SxSe1βx)4. Π£ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ, ΡΡΠΎ Ρ ΡΠΎΡΡΠΎΠΌ ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΠΈΠΈ ΡΠ΅ΡΡ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΡ ΡΠ»Π΅ΠΌΠ΅Π½ΡΠ°ΡΠ½ΠΎΠΉ ΡΡΠ΅ΠΉΠΊΠΈ ΠΏΠ»Π°Π²Π½ΠΎ ΡΠΌΠ΅Π½ΡΡΠ°ΡΡΡΡ ΠΏΠΎ Π»ΠΈΠ½Π΅ΠΉΠ½ΠΎΠΌΡ Π·Π°ΠΊΠΎΠ½Ρ Π² ΡΠΎΠΎΡΠ²Π΅ΡΡΡΠ²ΠΈΠΈ Ρ ΠΏΡΠ°Π²ΠΈΠ»ΠΎΠΌ ΠΠ΅Π³Π°ΡΠ΄Π°, ΡΡΠΎ ΡΠ²ΠΈΠ΄Π΅ΡΠ΅Π»ΡΡΡΠ²ΡΠ΅Ρ ΠΎΠ± ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½ΠΈΠΈ Π² ΡΠΈΡΡΠ΅ΠΌΠ΅ Cu2CdSn(SxSe1βx)4 Π½Π΅ΠΏΡΠ΅ΡΡΠ²Π½ΠΎΠ³ΠΎ ΡΡΠ΄Π° ΡΠ²Π΅ΡΠ΄ΡΡ
ΡΠ°ΡΡΠ²ΠΎΡΠΎΠ² Π² ΠΎΠ±Π»Π°ΡΡΠΈ 0 β€ x β€ 1. Π Π°ΡΡΡΠΈΡΠ°Π½ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡ ΡΠ΅ΡΡΠ°Π³ΠΎΠ½Π°Π»ΡΠ½ΡΡ
ΠΈΡΠΊΠ°ΠΆΠ΅Π½ΠΈΠΉ ΠΊΡΠΈΡΡΠ°Π»Π»ΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΠ΅ΡΠ΅ΡΠΊΠΈ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½Π½ΡΡ
ΡΠΎΠ΅Π΄ΠΈΠ½Π΅Π½ΠΈΠΉ h. ΠΠ½Π°ΡΠ΅Π½ΠΈΡ h Π±Π»ΠΈΠ·ΠΊΠΈ ΠΊ Π΅Π΄ΠΈΠ½ΠΈΡΠ΅ Π΄Π»Ρ Π²ΡΠ΅Ρ
ΠΈΠ·ΡΡΠ΅Π½Π½ΡΡ
ΡΠΎΡΡΠ°Π²ΠΎΠ², ΡΡΠΎ ΡΠ²ΠΈΠ΄Π΅ΡΠ΅Π»ΡΡΡΠ²ΡΠ΅Ρ ΠΎ ΠΌΠ°Π»ΡΡ
ΠΈΡΠΊΠ°ΠΆΠ΅Π½ΠΈΡΡ
ΠΊΡΠΈΡΡΠ°Π»Π»ΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΠ΅ΡΠ΅ΡΠΊΠΈ ΠΏΠΎΠ»ΡΡΠ΅Π½Π½ΡΡ
ΠΎΠ±ΡΠ°Π·ΡΠΎΠ²
Electronic properties and phase transitions in low-dimensional semiconductors
We present the first review of the current state of the literature on
electronic properties and phase transitions in TlX and TlMX2 (M = Ga, In; X =
Se, S, Te) compounds. These chalcogenides belong to a family of the
low-dimensional semiconductors possessing chain or layered structure. They are
of significant interest because of their highly anisotropic properties, semi-
and photoconductivity, non-linear effects in their I-V characteristics
(including a region of negative differential resistance), switching and memory
effects, second harmonic optical generation, relaxor behavior and potential
applications for optoelectronic devices. We review the crystal structure of TlX
and TlMX2 compounds, their transport properties under ambient conditions,
experimental and theoretical studies of the electronic structure, transport
properties and semiconductor-metal phase transitions under high pressure, and
sequences of temperature-induced structural phase transitions with intermediate
incommensurate states. Electronic nature of the ferroelectric phase transitions
in the above-mentioned compounds, as well as relaxor behavior, nanodomains and
possible occurrence of quantum dots in doped and irradiated crystals is
discussed.Comment: 70 pages, 38 figure
TURNING KINEMATICS WITH IMPOSITION OF ASYMMETRIC TOOL VIBRATIONS
The paper considers turning kinematics of structural carbon and alloy steels with imposition of directed asymmetric cutting tool vibrations on a conventional cutting pattern which are created by a cam system. An influence of tool vibratory motion parameters on crushing process of flow chips has been determined in the paper. The paper contains an equation of tool motion and reveals an influence of asymmetric coefficient of tool vibration cycle on slice thickness and dimensions of chip elements
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