The possibility of modifying the elements of the metal powder assembly with nanoparticles in order to reduce the friction

Сентябрь 14, 2022

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The possibility of modifying the elements of the metal powder assembly with nanoparticles in order to reduce the friction

Содержание

2. Viktor Mironov (Prof.hab.Dr.Sc.Ing.) Dr.Sc.Ing.Vyacheslav Lapkovsky Mg.Sc.Andrew Shishkin Prof.Dr.Sc.Ing. Irina Boyko Kipsalas srt. 6B-331, LV-1048, Riga, Latvia.
3. Powder details on the Basis Fe-C-Cu materials
4. Size geometry and properties of sintered billets
5. Studies using acoustic control Illustration of ultrasonic measurements: Left - the sample with a crack on
6. TEM micrographs of WS2 (a) and WSe2 (b) nanoparticles.
7. Dependence of the frictional torque versus time when testing a sleeve impregnated with mineral oil MS-20
8. Experimental setup for water WCS obtaining. General view (a) and scheme (b). 1 - container for
9. Energy up to 2,800 Ws Impulse currents up to 60,000 A Short-circuit-proof Short cycle times. EQUIPMENT
10. VHX-2000: Keyence REMAX IV Graphics System with High-Speed processing 2D & 3D Automated stitching (motorized XYZ
11. Conclusions . The test bushings with friction on the flat base of steel cylinder have close
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Viktor Mironov (Prof.hab.Dr.Sc.Ing.)
Dr.Sc.Ing.Vyacheslav Lapkovsky
Mg.Sc.Andrew Shishkin
Prof.Dr.Sc.Ing. Irina Boyko
Kipsalas srt. 6B-331, LV-1048, Riga,

Latvia. Ph. (+371) 29146944,

Dr.Sc.Ing.Aleksander Polyakov

RTU Scientific Laboratory of Powder Materials

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Powder details on the Basis Fe-C-Cu materials

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Size geometry and properties of sintered billets

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Studies using acoustic control
Illustration of ultrasonic measurements:
Left - the sample with

a crack on the right - the application of sensors

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TEM micrographs of WS2 (a) and WSe2 (b) nanoparticles.

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Dependence of the frictional torque versus time when testing a

sleeve impregnated with mineral oil MS-20 and lubricating compositions containing 4wt.% of WSe2 and WS2

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Experimental setup for water WCS obtaining. General view (a) and scheme

(b).
1 - container for suspension, 2 - motor, 3 - mixer-disperser; i - supply components to be mixed; ii - suspension output; iii - recycle stream

Multi-disk unit mixer disperser,
a) longitudinal sections; b) transverse sections

Cavitation mixer disperser

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Energy up to 2,800 Ws
Impulse currents up to 60,000 A
Short-circuit-proof
Short cycle

times.

EQUIPMENT FOR MAGNETISATION AND MAGNETIC FIELDS METERING

Impulse magnetizer U-Series NC, MAGNET-PHYSIK Dr. Steingroever GmbH

Gauss-/Teslameter FH-55, MAGNET-PHYSIK Dr. Steingroever GmbH

The magnetic field strength meter FH 55 is a compact precision instrument that measures the magnetic
flux density (induction) B and the magnetic field strength H in Gauss, Tesla or Ampere/Meter.

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VHX-2000: Keyence REMAX IV Graphics System with High-Speed processing
2D & 3D

Automated stitching (motorized XYZ position)
HDR High Dynamic Range
RGB Imaging
Super High Resolution Recording
Optical magnification up to 5000x

OPTICAL DIGITAL MICROSCOPE KEYENCE VHX-2000

Optical microscope Keyence VHX-2000

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Conclusions
. The test bushings with friction on the flat base

of steel cylinder have close moments of friction at brakedown and time intervals before stationary friction start, which is related to the identity of the initial conditions of friction, as well as to overlapping pores with oxide films of a certain thickness.
2. When the bushings is impregnated with the lubricating composition MS-20 + 4% WSe2 and MS-20 + 4% WS2, the average frictional torque decreases by ≈53% and ≈44% respectively in comparison with the bushings impregnated with MS-20 lubricating oil.
3. The most stable moment of friction was shown by bushings impregnated with lubricating composition MS-20 + 4% WS2, that may correspond with the shape of nanoparticles.

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