4 research outputs found
Structure and Properties of Nanocomposite Coatings Based on Titanium, Oxygen, Carbon and Hydrogen Obtained by the Cumulative-Detonation Device
Nanocomposite coatings based on Ti, O, C and H thickness of 70 β 200 microns with hardness of
1015 250 HV0.05 and porosity 2 β 5% were deposited on aluminium samples by using the cumulativedetonation
equipment. The nanocomposite coatings were examined by scanning electron microscopy
(SEM), transmission electron microscopy (TEM) with diffraction, X-ray phase analysis, hardness measurements.
It is shown that the area of the coating that adjoins to the substrate contains a transition layer
of intermetallic TiAl and the nanocomposite coatings based on Ti, O, C and H are characterized by the
presence of titanium nanocrystalline grains with face-centered close-packed lattice, amorphous phases and
nanoamorphous oxide of titanium. It was found that the main phases of the composite coatings are Ti, TiO,
rutile, anatase, Ti2O3. In the composite coatings formed from the hydrogenated powder was recorded the
presence of -TiH phase and TiH2.
When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3488
Phase composition and physical properties of Co-Cr base coating
Coating structure was mainly composed of Ξ±-fcp- and Ξ²-fcc-cobalt. Selected temperature
interval for coating formation, according to XRD analysis, allowed us to form
inter-metalloid compounds of CoxCry-type cobalt with chromium. Subsequent melting
of a surface layer by a plasma jet resulted to doping of the coating surface by Mo atoms
(compounds) from doping electrodes. It was demonstrated that essential improvement of
servicing characteristics was due phase transformations induced by high-temperature
plasma jet, Mo doping, redistribution of elements in the coating, and appearance of
micro- and nano-grained structure, as well as decreasing porosity due to repeated melting.
When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/2065
physical and mechanical properties of the nanocomposite and combined Ti-N-Si /WC-Co-Cr and Ti-N-Si/(CR3C2)75-(NiCr)25 coatings
Two types of the combined nanocomposite coatings (Ti-N-Si /WC-Co-Cr and Ti-N-Si/ (Cr3C2Ni)75-(NiCr)25) of 160-320 ΞΌm thickness were produced using two deposition techniques: the cumulative-detonation and the vacuum-arc deposition with the high-frequency discharge. This gives the possibility (using the combined coatings) to restore the size of worn areas of the tools and demonstrate the high corrosion and wear resistance, to increase the hardness, modulus of elasticity, and plasticity index. Composition of the top coating varied from Ti = 60 at.%, N = 30 at.%, and Si = 10 at.% to Ti = 75 at.%, N = 20 at.%, and Si = 5 at.%. In the first series of coatings the following phases were obtained: (Ti;Si) and TiN in thin top coating and WC and W2C in thick bottom coating. The second series gives (Ti;Si)N and TiN in top coating; Cr3Ni2 and pure Cr in bottom coating; and small amount of Ti19O17 in the transition region between thin and thick coatings. For the first series the grain size achieved 25 nm at the hardness of 38 GPa. For the second series the grain size was 15 nm at the hardness of 42 GΠ a Β± 4 GPa. It is shown that the corrosion resistance in salt solution and acid media increases with the wear decrease as a result of the cylinder friction over the surface of combined coating.
ΠΡΠΈ ΡΠΈΡΡΠ²Π°Π½Π½Ρ Π΄ΠΎΠΊΡΠΌΠ΅Π½ΡΠ°, Π²ΠΈΠΊΠΎΡΠΈΡΡΠΎΠ²ΡΠΉΡΠ΅ ΠΏΠΎΡΠΈΠ»Π°Π½Π½Ρ http://essuir.sumdu.edu.ua/handle/123456789/9351ΠΡΡΠΈΠΌΠ°Π½ΠΎ Π΄Π²Π° Π²ΠΈΠ΄ΠΈ ΠΊΠΎΠΌΠ±ΡΠ½ΠΎΠ²Π°Π½ΠΈΡ
Π½Π°Π½ΠΎΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡΠ½ΠΈΡ
ΠΏΠΎΠΊΡΠΈΡΡΡΠ² (Ti -N-Si /WC-Co-Cr; TI-N -Si/(Cr3C2Ni)75-(NiCr)25) ΡΠΎΠ²ΡΠΈΠ½ΠΎΡ 160 Γ· 320 ΠΌΠΊΠΌ Π· Π²ΠΈΠΊΠΎΡΠΈΡΡΠ°Π½Π½ΡΠΌ Π΄Π²ΠΎΡ
ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΡΠΉ ΠΎΡΠ°Π΄ΠΆΠ΅Π½Π½Ρ: ΠΊΡΠΌΡΠ»ΡΡΠΈΠ²Π½ΠΎ-Π΄Π΅ΡΠΎΠ½Π°ΡΡΠΉΠ½ΠΈΠΌ Π· ΠΏΠΎΠ΄Π°Π»ΡΡΠΈΠΌ ΠΎΡΠ°Π΄ΠΆΠ΅Π½Π½ΡΠΌ Π·Π° Π΄ΠΎΠΏΠΎΠΌΠΎΠ³ΠΎΡ Π²Π°ΠΊΡΡΠΌΠ½ΠΎ-Π΄ΡΠ³ΠΎΠ²ΠΎΠ³ΠΎ Π΄ΠΆΠ΅ΡΠ΅Π»Π° Ρ ΠΠ§ ΡΠΎΠ·ΡΡΠ΄Ρ. Π©ΠΎ Π΄Π°Ρ ΠΌΠΎΠΆΠ»ΠΈΠ²ΡΡΡΡ, Π·Π° Π΄ΠΎΠΏΠΎΠΌΠΎΠ³ΠΎΡ ΠΊΠΎΠΌΠ±ΡΠ½ΠΎΠ²Π°Π½ΠΎΠ³ΠΎ ΠΏΠΎΠΊΡΠΈΡΡΡ, Π²ΡΠ΄Π½ΠΎΠ²Π»ΡΠ²Π°ΡΠΈ ΡΠΎΠ·ΠΌΡΡ Π·Π½ΠΎΡΠ΅Π½ΠΈΡ
Π΄ΡΠ»ΡΠ½ΠΎΠΊ Π²ΠΈΡΠΎΠ±ΡΠ² ΡΠ· Π·Π°Ρ
ΠΈΡΡΠΎΠΌ ΡΡ
Π²ΡΠ΄ ΠΊΠΎΡΠΎΠ·ΡΡ, Π·Π½ΠΎΡΡ, ΠΏΡΠΈ ΡΡΠΎΠΌΡ Π·Π±ΡΠ»ΡΡΠΈΡΠΈ ΡΠ²Π΅ΡΠ΄ΡΡΡΡ, ΠΌΠΎΠ΄ΡΠ»Ρ ΠΏΡΡΠΆΠ½ΠΎΡΡΡ, ΡΠ½Π΄Π΅ΠΊΡ ΠΏΠ»Π°ΡΡΠΈΡΠ½ΠΎΡΡΡ. Π‘ΠΊΠ»Π°Π΄ Π²Π΅ΡΡ
Π½ΡΠΎΠ³ΠΎ ΠΏΠΎΠΊΡΠΈΡΡΡ Π·ΠΌΡΠ½ΡΠ²Π°Π»ΠΈ Π²ΡΠ΄ Ti = 60 %, N β 30 %, Si = 10 % Π΄ΠΎ Si = 5 %; N = 20 %, Ti = 75 %. Π£ ΠΏΠ΅ΡΡΡΠΉ ΡΠ΅ΡΡΡ ΠΏΠΎΠΊΡΠΈΡΡΡΠ² Π²ΠΈΡΠ²Π»Π΅Π½Ρ ΡΠ°Π·ΠΈ (Ti, Si) Ρ TiN Π² ΡΠΎΠ½ΠΊΠΎΠΌΡ Π²Π΅ΡΡ
Π½ΡΠΎΠΌΡ ΠΏΠΎΠΊΡΠΈΡΡΡ Ρ WC Ρ W2C Π² ΡΠΎΠ²ΡΡΠΎΠΌΡ Π½ΠΈΠΆΠ½ΡΠΎΠΌΡ ΠΏΠΎΠΊΡΠΈΡΡΡ.
Π£ Π΄ΡΡΠ³ΡΠΉ ΡΠ΅ΡΡΡ, Ρ Π²Π΅ΡΡ
Π½ΡΠΎΠΌΡ ΠΏΠΎΠΊΡΠΈΡΡΡ Π±ΡΠ»ΠΈ ΠΎΡΡΠΈΠΌΠ°Π½Ρ (Ti, Si) N Ρ TiN, Π° Π² Π½ΠΈΠΆΠ½ΡΠΎΠΌΡ ΠΏΠΎΠΊΡΠΈΡΡΡ Cr3Ni2, ΡΠΈΡΡΠΈΠΉ Cr; Π½Π΅Π²Π΅Π»ΠΈΠΊΠ° ΠΊΡΠ»ΡΠΊΡΡΡΡ Ti19O17 Π² ΠΏΠ΅ΡΠ΅Ρ
ΡΠ΄Π½ΡΠΉ ΠΎΠ±Π»Π°ΡΡΡ ΠΌΡΠΆ ΡΠΎΠ½ΠΊΠΈΠΌ Ρ ΡΠΎΠ²ΡΡΠΈΠΌ ΠΏΠΎΠΊΡΠΈΡΡΡΠΌ.
Π ΠΎΠ·ΠΌΡΡ Π·Π΅ΡΠ΅Π½ Π² ΠΏΠ΅ΡΡΠΎΠΌΡ Π²Π°ΡΡΠ°Π½ΡΡ ΡΠΎΠ½ΠΊΠΎΠ³ΠΎ ΠΏΠΎΠΊΡΠΈΡΡΡ ΡΠΊΠ»Π°Π΄Π°Π² 25 Π½ΠΌ, ΠΏΡΠΈ ΡΠ²Π΅ΡΠ΄ΠΎΡΡΡ 35 ΠΠΠ°, Π° Π² Π΄ΡΡΠ³ΠΎΠΌΡ Π²Π°ΡΡΠ°Π½ΡΡ ΡΠΎΠ·ΠΌΡΡ Π·Π΅ΡΠ΅Π½ ΠΊΡΠΈΡΡΠ°Π»ΡΡΡΠ² ΡΠΊΠ»Π°Π΄Π°Π² 15 Π½ΠΌ ΠΏΡΠΈ ΡΠ²Π΅ΡΠ΄ΠΎΡΡΡ Π = 42 Β± 3,6 ΠΠΠ°. ΠΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΠΎ ΠΊΠΎΡΠΎΠ·ΡΠΉΠ½Π° ΡΡΡΠΉΠΊΡΡΡΡ Π² ΡΠΎΠ»ΡΠΎΠ²ΠΎΠΌΡ ΡΠΎΠ·ΡΠΈΠ½Ρ Ρ ΠΊΠΈΡΠ»ΠΎΡΠ½ΠΎΠΌΡ ΡΠ΅ΡΠ΅Π΄ΠΎΠ²ΠΈΡΠ°Ρ
Π·Π±ΡΠ»ΡΡΡΡΡΡΡΡ, ΠΏΡΠΈ Π·ΠΌΠ΅Π½ΡΠ΅Π½Π½Ρ Π·Π½ΠΎΡΡ Π² ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ ΡΠ΅ΡΡΡ ΡΠΈΠ»ΡΠ½Π΄ΡΠ° ΠΏΠΎ ΠΏΠΎΠ²Π΅ΡΡ
Π½Ρ ΠΊΠΎΠΌΠ±ΡΠ½ΠΎΠ²Π°Π½ΠΎΠ³ΠΎ ΠΏΠΎΠΊΡΠΈΡΡΡ.
ΠΡΠΈ ΡΠΈΡΠΈΡΠΎΠ²Π°Π½ΠΈΠΈ Π΄ΠΎΠΊΡΠΌΠ΅Π½ΡΠ°, ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΠΉΡΠ΅ ΡΡΡΠ»ΠΊΡ http://essuir.sumdu.edu.ua/handle/123456789/9351ΠΠΎΠ»ΡΡΠ΅Π½ΠΎ Π΄Π²Π° Π²ΠΈΠ΄Π° ΠΊΠΎΠΌΠ±ΠΈΠ½ΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
Π½Π°Π½ΠΎΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡΠ½ΡΡ
ΠΏΠΎΠΊΡΡΡΠΈΠΉ (Ti-N-Si/WC-Co-Cr; Ti-N-Si/(Cr3C2Ni)75-(NiCr)25) ΡΠΎΠ»ΡΠΈΠ½ΠΎΠΉ 160 Γ· 320 ΠΌΠΊΠΌ Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ Π΄Π²ΡΡ
ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΠΈΠΉ ΠΎΡΠ°ΠΆΠ΄Π΅Π½ΠΈΡ: ΠΊΡΠΌΡΠ»ΡΡΠΈΠ²Π½ΠΎ-Π΄Π΅ΡΠΎΠ½Π°ΡΠΈΠΎΠ½Π½ΡΠΌ Ρ ΠΏΠΎΡΠ»Π΅Π΄ΡΡΡΠΈΠΌ ΠΎΡΠ°ΠΆΠ΄Π΅Π½ΠΈΠ΅ΠΌ Ρ ΠΏΠΎΠΌΠΎΡΡΡ Π²Π°ΠΊΡΡΠΌΠ½ΠΎ-Π΄ΡΠ³ΠΎΠ²ΠΎΠ³ΠΎ ΠΈΡΡΠΎΡΠ½ΠΈΠΊΠ° Π² ΠΠ§ ΡΠ°Π·ΡΡΠ΄Π΅. Π§ΡΠΎ Π΄Π°ΡΡ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡΡ, ΠΏΡΠΈ ΠΏΠΎΠΌΠΎΡΠΈ, ΠΊΠΎΠΌΠ±ΠΈΠ½ΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠ³ΠΎ ΠΏΠΎΠΊΡΡΡΠΈΡ Π²ΠΎΡΡΡΠ°Π½Π°Π²Π»ΠΈΠ²Π°ΡΡ ΡΠ°Π·ΠΌΠ΅Ρ ΠΈΠ·Π½ΠΎΡΠ΅Π½Π½ΡΡ
ΡΡΠ°ΡΡΠΊΠΎΠ² ΠΈΠ·Π΄Π΅Π»ΠΈΠΉ Ρ Π·Π°ΡΠΈΡΠΎΠΉ ΠΈΡ
ΠΎΡ ΠΊΠΎΡΡΠΎΠ·ΠΈΠΈ, ΠΈΠ·Π½ΠΎΡΠ°, ΠΏΡΠΈ ΡΡΠΎΠΌ ΡΠ²Π΅Π»ΠΈΡΠΈΡΡ ΡΠ²Π΅ΡΠ΄ΠΎΡΡΡ, ΠΌΠΎΠ΄ΡΠ»Ρ ΡΠΏΡΡΠ³ΠΎΡΡΠΈ, ΠΈΠ½Π΄Π΅ΠΊΡ ΠΏΠ»Π°ΡΡΠΈΡΠ½ΠΎΡΡΠΈ. Π‘ΠΎΡΡΠ°Π² Π²Π΅ΡΡ
Π½Π΅Π³ΠΎ ΠΏΠΎΠΊΡΡΡΠΈΡ ΠΈΠ·ΠΌΠ΅Π½ΡΠ»ΠΈ ΠΎΡ Ti = 60 %, N β 30 %, Si = 10 % Π΄ΠΎ Si = 5 %; N = 20 %, Ti = 75 %. Π ΠΏΠ΅ΡΠ²ΠΎΠΉ ΡΠ΅ΡΠΈΠΈ ΠΏΠΎΠΊΡΡΡΠΈΠΉ ΠΎΠ±Π½Π°ΡΡΠΆΠ΅Π½Ρ ΡΠ°Π·Ρ (Ti; Si) ΠΈ TiN Π² ΡΠΎΠ½ΠΊΠΎΠΌ Π²Π΅ΡΡ
Π½Π΅ΠΌ ΠΏΠΎΠΊΡΡΡΠΈΠΈ ΠΈ WC ΠΈ W2C Π² ΡΠΎΠ»ΡΡΠΎΠΌ Π½ΠΈΠΆΠ½Π΅ΠΌ ΠΏΠΎΠΊΡΡΡΠΈΠΈ. ΠΠΎ Π²ΡΠΎΡΠΎΠΉ ΡΠ΅ΡΠΈΠΈ, Π² Π²Π΅ΡΡ
Π½Π΅ΠΌ ΠΏΠΎΠΊΡΡΡΠΈΠΈ Π±ΡΠ»ΠΈ ΠΏΠΎΠ»ΡΡΠ΅Π½Ρ (Ti, Si)N ΠΈ TiN, Π° Π² Π½ΠΈΠΆΠ½Π΅ΠΌ ΠΏΠΎΠΊΡΡΡΠΈΠΈ Cr3Ni2, ΡΠΈΡΡΡΠΉ Cr; Π½Π΅Π±ΠΎΠ»ΡΡΠΎΠ΅ ΠΊΠΎΠ»ΠΈΡΠ΅ΡΡΠ²ΠΎ Ti19O17 Π² ΠΏΠ΅ΡΠ΅Ρ
ΠΎΠ΄Π½ΠΎΠΉ ΠΎΠ±Π»Π°ΡΡΠΈ ΠΌΠ΅ΠΆΠ΄Ρ ΡΠΎΠ½ΠΊΠΈΠΌ ΠΈ ΡΠΎΠ»ΡΡΡΠΌ ΠΏΠΎΠΊΡΡΡΠΈΠ΅ΠΌ. Π Π°Π·ΠΌΠ΅Ρ, Π·Π΅ΡΠ΅Π½ Π² ΠΏΠ΅ΡΠ²ΠΎΠΌ Π²Π°ΡΠΈΠ°Π½ΡΠ΅ ΡΠΎΠ½ΠΊΠΎΠ³ΠΎ ΠΏΠΎΠΊΡΡΡΠΈΡ, ΡΠΎΡΡΠ°Π²Π»ΡΠ» 25 Π½ΠΌ, ΠΏΡΠΈ ΡΠ²ΡΡΠ΄ΠΎΡΡΠΈ 35 ΠΠΠ°, Π° Π²ΠΎ Π²ΡΠΎΡΠΎΠΌ Π²Π°ΡΠΈΠ°Π½ΡΠ΅ ΡΠ°Π·ΠΌΠ΅Ρ Π·ΡΡΠ΅Π½ ΠΊΡΠΈΡΡΠ°Π»Π»ΠΈΡΠΎΠ² ΡΠΎΡΡΠ°Π²Π»ΡΠ» 15 Π½ΠΌ ΠΏΡΠΈ ΡΠ²ΡΡΠ΄ΠΎΡΡΠΈ Π = 42 Γ· 3,6 ΠΠΠ°. ΠΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΡΠΎ ΠΊΠΎΡΡΠΎΠ·ΠΈΠΎΠ½Π½Π°Ρ ΡΡΠΎΠΉΠΊΠΎΡΡΡ Π² ΡΠΎΠ»Π΅Π²ΠΎΠΌ ΡΠ°ΡΡΠ²ΠΎΡΠ΅ ΠΈ ΠΊΠΈΡΠ»ΠΎΡΠ½ΠΎΠΉ ΡΡΠ΅Π΄Π°Ρ
ΡΠ²Π΅Π»ΠΈΡΠΈΠ²Π°Π΅ΡΡΡ ΠΏΡΠΈ ΡΠΌΠ΅Π½ΡΡΠ΅Π½ΠΈΠΈ ΠΈΠ·Π½ΠΎΡΠ° Π² ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠ΅ ΡΡΠ΅Π½ΠΈΡ ΡΠΈΠ»ΠΈΠ½Π΄ΡΠ° ΠΏΠΎ ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠΈ ΠΊΠΎΠΌΠ±ΠΈΠ½ΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠ³ΠΎ ΠΏΠΎΠΊΡΡΡΠΈΡ.
When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/935
Formation of multilayered Ti-Hf-Si-N/NbN/Al2O3 coatings with high physical and mechanical properties
This work presents the first results on forming of multi-layered superhard coatings Ti-Hf-Si-N/NbN/Al2O3 and their properties as well as structure. Microstructure, elemental and phase compositions of multi-layered coatings obtained by different methods were investigated. There were used such methods as: scanning electron microscopy EDS JEM-7000F microscope (with microanalysis) for research of cross-section of coatings, with subsequent Auger-electron spectroscopy, X-ray diffraction analysis, optical inverted microscope Olympus GX51, electron-ion microscopes Quanta 200 3D and Quanta 600 (scanning electron microscopy), equipped by the detector of X-ray
radiation of the system PEGASUS 2000. It was stated that hardness of coatings has reached 56 GPa, and at the
same time the factor of wearing during friction was the smallest 2.571x10(-5). It was also noted that nitrogen
pressure in the chamber at the deposition of the top layer significantly influences on the properties of samples. For
example, the coe cient of friction at P = 0:3 Pa from 0.2 at the beginning of track to 0.001 (during the tests), and at the pressure of nitrogen P = 0:8 Pa, the coefficient of friction was equal to 0.314 at the beginning of track and 0.384 at the end (during the tests).
When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3393