16 research outputs found
Probe microscopy in the study of the surface of aluminum alloys
The work was supported by the Grant of the RNF 14-19-01033-P (study of topography and elemental composition of the surface) and the State Task (β State registration AAAA-A17-117021310379-5 - study of electrical properties of the surface). The authors are grateful to N.A. Belov (MISiS) for providing samples
SEM and SPM studies of friction composite materials based on carbon graphitized fibers
The work was supported by the Russian Scientific Foundation (project no. 19-19-00548)
Methods of probe microscopy in the study of topography and elastic properties of cold-resistant elastomers
The work was carried out under the financial support of the Russian Science Fund, grant 14-29-00198-Π(sample preparation and scanning electron microscopy) and the Federal Agency of Scientific Organizations - Agreement No 007-ΠΠ/Π§3363/26 (scanning probe microscopy)
Probe and electron microscopy of the surface of antifriction aluminium alloys
Π Π°Π±ΠΎΡΠ° ΠΏΠΎΡΠ²ΡΡΠ΅Π½Π° ΠΈΠ·ΡΡΠ΅Π½ΠΈΡ ΠΆΠ΅Π»Π΅Π·ΠΎΡΠΎΠ΄Π΅ΡΠΆΠ°ΡΠΈΡ
Π°Π½ΡΠΈΡΡΠΈΠΊΡΠΈΠΎΠ½Π½ΡΡ
Π°Π»ΡΠΌΠΈΠ½ΠΈΠ΅Π²ΡΡ
ΡΠΏΠ»Π°Π²ΠΎΠ². ΠΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΠΏΡΠΎΠ²ΠΎΠ΄ΠΈΠ»ΠΈ Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠ° ΡΠ°Π·Π»ΠΈΡΠ½ΡΡ
ΠΌΠ΅ΡΠΎΠ΄ΠΎΠ² ΠΌΠΈΠΊΡΠΎΡΠΊΠΎΠΏΠΈΠΈ, Π²Π·Π°ΠΈΠΌΠ½ΠΎ Π΄ΠΎΠΏΠΎΠ»Π½ΡΡΡΠΈΡ
Π΄ΡΡΠ³ Π΄ΡΡΠ³Π°. ΠΡΠ»ΠΈ ΠΈΠ·ΡΡΠ΅Π½Ρ ΠΎΠ±ΡΠ°Π·ΡΡ ΡΠΏΠ»Π°Π²ΠΎΠ², ΠΊΠ°ΠΊ Π² ΠΈΡΡ
ΠΎΠ΄Π½ΠΎΠΌ ΡΠΎΡΡΠΎΡΠ½ΠΈΠΈ, ΡΠ°ΠΊ ΠΈ ΠΏΠΎΡΠ»Π΅ ΡΠ°Π·Π»ΠΈΡΠ½ΡΡ
Π²ΠΈΠ΄ΠΎΠ² ΡΠ΅ΡΠΌΠΎΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠΈ (Π’Π). ΠΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΡΠΎ Π’Π ΠΏΡΠΈΠ²ΠΎΠ΄ΠΈΡ ΠΊ ΡΡΡΠ΅ΡΡΠ²Π΅Π½Π½ΡΠΌ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΡΠΌ ΡΡΡΡΠΊΡΡΡΡ ΡΠΏΠ»Π°Π²ΠΎΠ².The work is devoted to investigation of iron-containing aluminum antifrictional alloys. Mutually complementary different microscopy methods were used. Samples at the initial state and after the different types of heat-treatments were investigated. It was shown that some types of treatment lead to significant changing of the surface structure.Π Π°Π±ΠΎΡΠ° ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½Π° ΠΏΡΠΈ ΠΏΠΎΠ΄Π΄Π΅ΡΠΆΠΊΠ΅ Π³ΡΠ°Π½ΡΠ° Π ΠΠ€ 14-19-01033. ΠΠ²ΡΠΎΡΡ Π±Π»Π°Π³ΠΎΠ΄Π°ΡΠ½Ρ Π.Π.ΠΠ΅Π»ΠΎΠ²Ρ (ΠΠΠ‘ΠΈΠ‘) Π·Π° ΠΏΡΠ΅Π΄ΠΎΡΡΠ°Π²Π»Π΅Π½ΠΈΠ΅ ΠΎΠ±ΡΠ°Π·ΡΠΎ
Probe Microscopy of Adhesive and Viscous parameters of Elastomers
Π ΡΠ°Π±ΠΎΡΠ΅ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π»ΠΎΡΡ Π²Π»ΠΈΡΠ½ΠΈΠ΅ ΡΠ°Π·Π»ΠΈΡΠ½ΡΡ
ΠΌΠΎΠ΄ΠΈΡΠΈΠΊΠ°ΡΠΎΡΠΎΠ² (ΡΠ΅Ρ
Π½ΠΈΡΠ΅ΡΠΊΠΈΠΉ ΡΠ³Π»Π΅ΡΠΎΠ΄, ΠΎΠΊΡΠΈΠ΄ Π³ΡΠ°ΡΠ΅Π½Π° ΠΈ ΡΡΠΎΡΡΠΎΠ΄Π΅ΡΠΆΠ°ΡΠΈΠΉ ΠΌΠΎΠ΄ΠΈΡΠΈΠΊΠ°ΡΠΎΡ) Π½Π° ΡΠΊΡΠΏΠ»ΡΠ°ΡΠ°ΡΠΈΠΎΠ½Π½ΡΠ΅ ΡΠ²ΠΎΠΉΡΡΠ²Π° Π½ΠΈΠ·ΠΊΠΎΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΠ½ΡΡ
ΡΠΏΠ»ΠΎΡΠ½ΠΈΡΠ΅Π»ΡΠ½ΡΡ
ΡΠ΅Π·ΠΈΠ½. ΠΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΡΠΎ Π²Π²Π΅Π΄Π΅Π½ΠΈΠ΅ ΡΠ΅Ρ
Π½ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠ³Π»Π΅ΡΠΎΠ΄Π°, ΠΏΡΠΈΠ²ΠΎΠ΄ΠΈΡ ΠΊ Π·Π½Π°ΡΠΈΡΠ΅Π»ΡΠ½ΠΎΠΌΡ ΡΠ²Π΅Π»ΠΈΡΠ΅Π½ΠΈΡ ΠΏΡΠΎΡΠ½ΠΎΡΡΠΈ ΠΈ ΠΌΠΎΠ΄ΡΠ»Π΅ΠΉ ΠΏΡΠΈ ΡΠ°ΡΡΡΠΆΠ΅Π½ΠΈΠΈ.The influence of different Modifying Agents (Technical Carbon (TC), Graphene Oxide and fluorine composite) on operating parameters of Low-temperature Rubbers was investigated. It was shown that addition of TC leads to significant increase of strength and strain modulus.Π Π°Π±ΠΎΡΠ° ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½Π° ΠΏΡΠΈ ΠΏΠΎΠ΄Π΄Π΅ΡΠΆΠΊΠ΅ Π³ΡΠ°Π½ΡΠ° Π ΠΠ€ 14-29-00198
ΠΠ·ΡΡΠ΅Π½ΠΈΠ΅ ΡΡΡΡΠΊΡΡΡΠ½ΡΡ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΠΉ ΠΏΠΎΠ²Π΅ΡΡ Π½ΠΎΡΡΠ½ΡΡ ΡΠ»ΠΎΠ΅Π² Π°Π»ΡΠΌΠΈΠ½ΠΈΠ΅Π²ΡΡ ΡΠΏΠ»Π°Π²ΠΎΠ² Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΡΠΈΡΡΠ΅ΠΌΡ AlβSiβCu ΠΏΡΠΈ ΠΈΡ Π΄Π΅ΡΠΎΡΠΌΠ°ΡΠΈΠΈ Π² ΠΏΡΠΎΡΠ΅ΡΡΠ΅ ΡΡΠ΅Π½ΠΈΡ
Experimental antifriction aluminum alloys based on the Alβ5%Siβ4%Cu system with the addition of Bi, Pb, In, and Cd low-melting components were studied. An optimal heat treatment mode was selected: hardening at 500 Β°Π‘ with further aging at 175 Β°Π‘. Tribological tests were carried out according to the Β«shoeβrollerΒ» scheme (investigated material β Steel 45) (at pressures of 0.5, 1 and 2 MPa) simulating the bearing assembly operation. It was shown that all the experimental alloys have similar tribological properties. However, their mechanical properties (in particular, hardness) differ. A cadmium containing alloy had the highest hardness. Electron microscopic studies of the shoe and roller surfaces were carried out for samples made of this alloy before and after tribological tests including the study of topography and elemental composition. The process of active mass transfer in the contact zone during friction was revealed. At the same time, the roller demonstrated a film formed of secondary structures on the roller and its parameters were determined Β (uneven pattern of location on the surface, considerable relief with the maximum thickness up to 200 ΞΌm). It was shown that such a film leads to score formation with the friction modes used. It was determined that for all experimental alloys scoring occurs after testing at pressures above 1 MPa. Shoe nanoindentation (with 10β100 mN loads) showed increased hardness in the surface layer with a thickness of about 30 ΞΌm. This may be connected with the material hardening as a result of plastic strains occurred in the friction zone.Π ΡΠ°Π±ΠΎΡΠ΅ ΠΈΠ·ΡΡΠ΅Π½Ρ ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΡΠ΅ Π°Π½ΡΠΈΡΡΠΈΠΊΡΠΈΠΎΠ½Π½ΡΠ΅ Π°Π»ΡΠΌΠΈΠ½ΠΈΠ΅Π²ΡΠ΅ ΡΠΏΠ»Π°Π²Ρ Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΡΠΈΡΡΠ΅ΠΌΡ Alβ5%Siβ4%Cu Ρ Π΄ΠΎΠ±Π°Π²Π»Π΅Π½ΠΈΠ΅ΠΌ Π»Π΅Π³ΠΊΠΎΠΏΠ»Π°Π²ΠΊΠΈΡ
ΠΊΠΎΠΌΠΏΠΎΠ½Π΅Π½ΡΠΎΠ² Bi, Pb, In ΠΈ Cd. ΠΠΎΠ΄ΠΎΠ±ΡΠ°Π½ ΠΎΠΏΡΠΈΠΌΠ°Π»ΡΠ½ΡΠΉ ΡΠ΅ΠΆΠΈΠΌ ΡΠ΅ΡΠΌΠΎΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠΈ, Π²ΠΊΠ»ΡΡΠ°ΡΡΠΈΠΉ Π·Π°ΠΊΠ°Π»ΠΈΠ²Π°Π½ΠΈΠ΅ ΠΏΡΠΈ ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΠ΅ 500 Β°Π‘ Ρ Π΄Π°Π»ΡΠ½Π΅ΠΉΡΠΈΠΌ ΡΡΠ°ΡΠ΅Π½ΠΈΠ΅ΠΌ ΠΏΡΠΈ 175 Β°Π‘. ΠΡΠΎΠ²Π΅Π΄Π΅Π½Ρ ΡΡΠΈΠ±ΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΠΈΡΠΏΡΡΠ°Π½ΠΈΡ ΠΏΠΎ ΡΡ
Π΅ΠΌΠ΅ ΠΊΠΎΠ»ΠΎΠ΄ΠΊΠ°βΡΠΎΠ»ΠΈΠΊ (ΠΈΡΡΠ»Π΅Π΄ΡΠ΅ΠΌΡΠΉ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π» β Π‘ΡΠ°Π»Ρ 45) ΠΏΡΠΈ Π΄Π°Π²Π»Π΅Π½ΠΈΡΡ
0,5, 1,0 ΠΈ 2,0 ΠΠΠ°, ΠΌΠΎΠ΄Π΅Π»ΠΈΡΡΡΡΠΈΠ΅ ΡΠ°Π±ΠΎΡΡ ΠΏΠΎΠ΄ΡΠΈΠΏΠ½ΠΈΠΊΠΎΠ²ΠΎΠ³ΠΎ ΡΠ·Π»Π°. ΠΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΡΠΎ Π²ΡΠ΅ ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΡΠ΅ ΡΠΏΠ»Π°Π²Ρ ΠΎΠ±Π»Π°Π΄Π°ΡΡ Π±Π»ΠΈΠ·ΠΊΠΈΠΌΠΈ ΡΡΠΈΠ±ΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΠΌΠΈ ΡΠ²ΠΎΠΉΡΡΠ²Π°ΠΌΠΈ, ΠΎΠ΄Π½Π°ΠΊΠΎ ΠΈΡ
ΠΌΠ΅Ρ
Π°Π½ΠΈΡΠ΅ΡΠΊΠΈΠ΅ Ρ
Π°ΡΠ°ΠΊΡΠ½ΡΠΈΡΡΠΈΠΊΠΈ, Π² ΡΠ°ΡΡΠ½ΠΎΡΡΠΈ ΠΏΠΎΠΊΠ°Π·Π°ΡΠ΅Π»ΠΈ ΡΠ²Π΅ΡΠ΄ΠΎΡΡΠΈ, ΡΠ°Π·Π»ΠΈΡΠ°ΡΡΡΡ. ΠΠ°ΠΈΠ±ΠΎΠ»ΡΡΠ΅Π΅ Π΅Π΅ Π·Π½Π°ΡΠ΅Π½ΠΈΠ΅ ΠΈΠΌΠ΅Π΅Ρ ΡΠΏΠ»Π°Π², ΡΠΎΠ΄Π΅ΡΠΆΠ°ΡΠΈΠΉ ΠΊΠ°Π΄ΠΌΠΈΠΉ. ΠΠ»Π΅ΠΊΡΡΠΎΠ½Π½ΠΎ-ΠΌΠΈΠΊΡΠΎΡΠΊΠΎΠΏΠΈΡΠ΅ΡΠΊΠΈΠΌ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½Ρ ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠΈ ΠΊΠΎΠ»ΠΎΠ΄ΠΊΠΈ ΠΈ ΡΠΎΠ»ΠΈΠΊΠ° ΠΈΠ· ΡΡΠΎΠ³ΠΎ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Π° Π΄ΠΎ ΠΈ ΠΏΠΎΡΠ»Π΅ ΡΡΠΈΠ±ΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΈΡΠΏΡΡΠ°Π½ΠΈΠΉ: ΠΈΠ·ΡΡΠ΅Π½Π° ΡΠΎΠΏΠΎΠ³ΡΠ°ΡΠΈΡ ΠΈ ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ ΡΠ»Π΅ΠΌΠ΅Π½ΡΠ½ΡΠΉ ΡΠΎΡΡΠ°Π². ΠΡΡΠ²Π»Π΅Π½ ΠΏΡΠΎΡΠ΅ΡΡ Π°ΠΊΡΠΈΠ²Π½ΠΎΠ³ΠΎ ΠΌΠ°ΡΡΠΎΠΏΠ΅ΡΠ΅Π½ΠΎΡΠ° Π² ΠΊΠΎΠ½ΡΠ°ΠΊΡΠ½ΠΎΠΉ Π·ΠΎΠ½Π΅ ΠΏΡΠΈ ΡΡΠ΅Π½ΠΈΠΈ. ΠΡΠΈ ΡΡΠΎΠΌ Π½Π° ΡΠΎΠ»ΠΈΠΊΠ΅ ΠΎΠ±Π½Π°ΡΡΠΆΠ΅Π½ΠΎ ΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ ΠΏΠ»Π΅Π½ΠΊΠΈ Π²ΡΠΎΡΠΈΡΠ½ΡΡ
ΡΡΡΡΠΊΡΡΡ ΠΈ ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½Ρ Π΅Π΅ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΡ: Π½Π΅ΡΠ°Π²Π½ΠΎΠΌΠ΅ΡΠ½ΡΠΉ Ρ
Π°ΡΠ°ΠΊΡΠ΅Ρ ΡΠ°ΡΠΏΠΎΠ»ΠΎΠΆΠ΅Π½ΠΈΡ Π½Π° ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠΈ ΠΈ ΡΠ°Π·Π²ΠΈΡΡΠΉ ΡΠ΅Π»ΡΠ΅Ρ, ΠΌΠ°ΠΊΡΠΈΠΌΠ°Π»ΡΠ½Π°Ρ ΡΠΎΠ»ΡΠΈΠ½Π° ΠΊΠΎΡΠΎΡΠΎΠ³ΠΎ Π΄ΠΎΡΡΠΈΠ³Π°Π΅Ρ 200 ΠΌΠΊΠΌ. ΠΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΡΠΎ ΠΏΡΠΈ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½Π½ΡΡ
ΡΠ΅ΠΆΠΈΠΌΠ°Ρ
ΡΡΠ΅Π½ΠΈΡ ΡΠ°ΠΊΠ°Ρ ΠΏΠ»Π΅Π½ΠΊΠ° ΡΠΏΠΎΡΠΎΠ±ΡΡΠ²ΡΠ΅Ρ ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½ΠΈΡ Π·Π°Π΄ΠΈΡΠ°. Π£ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ, ΡΡΠΎ Π·Π°Π΄ΠΈΡ Π΄Π»Ρ Π²ΡΠ΅Ρ
ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΡΡ
ΡΠΏΠ»Π°Π²ΠΎΠ² Π½Π°ΡΡΡΠΏΠ°Π΅Ρ ΠΏΠΎΡΠ»Π΅ ΠΈΡΠΏΡΡΠ°Π½ΠΈΠΉ ΠΏΡΠΈ Π΄Π°Π²Π»Π΅Π½ΠΈΠΈ Π²ΡΡΠ΅ 1 ΠΠΠ°. ΠΡΠΎΠ²Π΅Π΄Π΅Π½Π½ΠΎΠ΅ Π½Π°Π½ΠΎΠΈΠ½Π΄Π΅Π½ΡΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ ΠΊΠΎΠ»ΠΎΠ΄ΠΊΠΈ (Ρ Π½Π°Π³ΡΡΠ·ΠΊΠ°ΠΌΠΈ ΠΎΡ 10 Π΄ΠΎ 100 ΠΌΠ) ΠΏΠΎΠΊΠ°Π·Π°Π»ΠΎ ΡΠ²Π΅Π»ΠΈΡΠ΅Π½ΠΈΠ΅ ΡΠ²Π΅ΡΠ΄ΠΎΡΡΠΈ Π² ΠΏΡΠΈΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠ½ΠΎΠΌ ΡΠ»ΠΎΠ΅ ΡΠΎΠ»ΡΠΈΠ½ΠΎΠΉ ΠΎΠΊΠΎΠ»ΠΎ 30 ΠΌΠΊΠΌ. ΠΡΠΎ ΠΌΠΎΠΆΠ΅Ρ Π±ΡΡΡ ΡΠ²ΡΠ·Π°Π½ΠΎ Ρ ΡΠΏΡΠΎΡΠ½Π΅Π½ΠΈΠ΅ΠΌ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Π° Π² ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠ΅ Π²ΠΎΠ·Π½ΠΈΠΊΠ½ΠΎΠ²Π΅Π½ΠΈΡ ΠΏΠ»Π°ΡΡΠΈΡΠ΅ΡΠΊΠΈΡ
Π΄Π΅ΡΠΎΡΠΌΠ°ΡΠΈΠΉ Π² Π·ΠΎΠ½Π΅ ΡΡΠ΅Π½ΠΈΡ
Probe microscopy and another microscopy methods for investigation of the surface of non-homogeneous materials
Π’ΠΎΠ½ΠΊΠΈΠ΅ ΠΏΠΎΠΊΡΡΡΠΈΡ, ΡΠΎΡΡΠΎΡΡΠΈΠ΅ ΠΈΠ· ΠΎΠΊΡΠΈΠ΄ΠΎΠ² l, Zr ΠΈ Y, Π½Π°Π½Π΅ΡΠ΅Π½Π½ΡΡ
Π½Π° ΡΡΠ°Π»ΡΠ½ΡΡ ΠΏΠΎΠ΄Π»ΠΎΠΆΠΊΡ ΠΈΠ· Π½Π΅ΡΠΆΠ°Π²Π΅ΡΡΠ΅ΠΉ ΡΡΠ°Π»ΠΈ, ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π»ΠΈΡΡ Π΄ΠΎ ΠΈ ΠΏΠΎΡΠ»Π΅ ΡΡΠΈΠ±ΠΎΡΠ΅Ρ
Π½ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΈΡΠΏΡΡΠ°Π½ΠΈΠΉ. ΠΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΡΠΎ ΠΏΠΎΠΊΡΡΡΠΈΡ Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ Π΄ΠΈΠΎΠΊΡΠΈΠ΄Π° ΡΠΈΡΠΊΠΎΠ½ΠΈΡ, ΡΡΠ°Π±ΠΈΠ»ΠΈΠ·ΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠ³ΠΎ ΠΈΡΡΡΠΈΠ΅ΠΌ, ΡΠ²Π΅Π»ΠΈΡΠΈΠ²Π°ΡΡ ΡΠ΅ΡΡΡΡ ΡΠ°Π±ΠΎΡΡ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Π°.Thin over layers (Al, Zr and Y oxides), deposited on stainless steel substrate, were investigated before and after the friction tests. It was shown that covering by zirconium oxide (stabilized by yttrium) leads to increase of operation life of composition.Π Π°Π±ΠΎΡΠ° ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½Π° ΠΏΡΠΈ ΠΏΠΎΠ΄Π΄Π΅ΡΠΆΠΊΠ΅ Π³ΡΠ°Π½ΡΠ° Π Π€Π€Π 15-08-06298