3 research outputs found
ΠΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ Π΄Π΅ΡΠΎΡΠΌΠ°ΡΠΈΠΎΠ½Π½ΠΎΠ³ΠΎ ΠΏΠΎΠ²Π΅Π΄Π΅Π½ΠΈΡ TiNi-ΡΠΏΠ»Π°Π²Π° Ρ TiN-ΠΏΠΎΠΊΡΡΡΠΈΡΠΌΠΈ Π΄Π»Ρ ΠΌΠ΅Π΄ΠΈΡΠΈΠ½ΡΠΊΠΎΠ³ΠΎ ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΡ
The deformation behavior of the titanium nickelide alloy Tiβ55.84 wt. % Ni (TiNi) with titanium nitride (TiN) coatings obtained by arc-PVD has been simulated. Differential scanning calorimetry and three-point bending test were used to study the parameters of martensitic transformations and the deformation behavior of this alloy. The values of the characteristic temperatures for the TiNi alloy that can be used in medical applications were substantiated. The elastic-force characteristics of the alloy related to the properties in the superelastic state were considered. The dependiences of the change in the phase yield strength, the stress of the unloading plateau, and the residual deformation of the TiNi samples with TiN coatings on the ambient temperature range between 6 to 37 Β°C were determined. Based on these dependencies, a deformation curve was obtained that can predict the mechanical behavior of a TiNi product, for example, a stent, before and during its implantation into a human body. TiNi-based shape memory alloys are widely used in various branches of medicine; therefore, the development of technological methods for manufacturing products from TiNi with high corrosion resistance is promising.ΠΡΠΏΠΎΠ»Π½Π΅Π½ΠΎ ΠΌΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ Π΄Π΅ΡΠΎΡΠΌΠ°ΡΠΈΠΎΠ½Π½ΠΎΠ³ΠΎ ΠΏΠΎΠ²Π΅Π΄Π΅Π½ΠΈΡ ΡΠΏΠ»Π°Π²Π° Π½ΠΈΠΊΠ΅Π»ΠΈΠ΄Π° ΡΠΈΡΠ°Π½Π° Tiβ55,84 ΠΌΠ°Ρ.% Ni (TiNi) Ρ ΠΏΠΎΠΊΡΡΡΠΈΡΠΌΠΈ ΠΈΠ· Π½ΠΈΡΡΠΈΠ΄Π° ΡΠΈΡΠ°Π½Π° (TiN), ΠΏΠΎΠ»ΡΡΠ΅Π½Π½ΡΠΌΠΈ Π²Π°ΠΊΡΡΠΌΠ½ΠΎ-Π΄ΡΠ³ΠΎΠ²ΡΠΌ ΠΎΡΠ°ΠΆΠ΄Π΅Π½ΠΈΠ΅ΠΌ. Π‘ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠ² Π΄ΠΈΡΡΠ΅ΡΠ΅Π½ΡΠΈΠ°Π»ΡΠ½ΠΎΠΉ ΡΠΊΠ°Π½ΠΈΡΡΡΡΠ΅ΠΉ ΠΊΠ°Π»ΠΎΡΠΈΠΌΠ΅ΡΡΠΈΠΈ ΠΈ ΡΡΠ΅Ρ
ΡΠΎΡΠ΅ΡΠ½ΠΎΠ³ΠΎ ΠΈΠ·Π³ΠΈΠ±Π° ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½Ρ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΡ ΠΌΠ°ΡΡΠ΅Π½ΡΠΈΡΠ½ΡΡ
ΠΏΡΠ΅Π²ΡΠ°ΡΠ΅Π½ΠΈΠΉ ΠΈ Π΄Π΅ΡΠΎΡΠΌΠ°ΡΠΈΠΎΠ½Π½ΠΎΠ΅ ΠΏΠΎΠ²Π΅Π΄Π΅Π½ΠΈΠ΅ Π΄Π°Π½Π½ΠΎΠ³ΠΎ ΡΠΏΠ»Π°Π²Π°. ΠΠ±ΠΎΡΠ½ΠΎΠ²Π°Π½Ρ Π·Π½Π°ΡΠ΅Π½ΠΈΡ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡ TiNi Π΄Π»Ρ Π΅Π³ΠΎ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΡ Π² ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Π° ΠΌΠ΅Π΄ΠΈΡΠΈΠ½ΡΠΊΠΎΠ³ΠΎ Π½Π°Π·Π½Π°ΡΠ΅Π½ΠΈΡ. Π Π°ΡΡΠΌΠΎΡΡΠ΅Π½Ρ ΡΠΏΡΡΠ³ΠΎ-ΡΠΈΠ»ΠΎΠ²ΡΠ΅ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΠΈ ΡΠΏΠ»Π°Π²Π°, ΡΠ²ΡΠ·Π°Π½Π½ΡΠ΅ Ρ ΠΏΡΠΎΡΠ²Π»Π΅Π½ΠΈΠ΅ΠΌ ΡΠ²ΠΎΠΉΡΡΠ² Π² ΡΠ²Π΅ΡΡ
ΡΠ»Π°ΡΡΠΈΡΠ½ΠΎΠΌ ΡΠΎΡΡΠΎΡΠ½ΠΈΠΈ. Π£ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½Ρ Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡΠΈ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΡ ΡΠ°Π·ΠΎΠ²ΠΎΠ³ΠΎ ΠΏΡΠ΅Π΄Π΅Π»Π° ΡΠ΅ΠΊΡΡΠ΅ΡΡΠΈ, Π½Π°ΠΏΡΡΠΆΠ΅Π½ΠΈΡ ΡΠ°Π·Π³ΡΡΠ·ΠΎΡΠ½ΠΎΠ³ΠΎ ΠΏΠ»Π°ΡΠΎ ΠΈ ΠΎΡΡΠ°ΡΠΎΡΠ½ΠΎΠΉ Π΄Π΅ΡΠΎΡΠΌΠ°ΡΠΈΠΈ ΠΎΠ±ΡΠ°Π·ΡΠΎΠ² TiNi Ρ TiN-ΠΏΠΎΠΊΡΡΡΠΈΡΠΌΠΈ ΠΎΡ ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΡ ΠΎΠΊΡΡΠΆΠ°ΡΡΠ΅ΠΉ ΡΡΠ΅Π΄Ρ Π² Π΄ΠΈΠ°ΠΏΠ°Π·ΠΎΠ½Π΅ ΠΎΡ 6 Π΄ΠΎ 37 Β°Π‘. ΠΠ° ΠΎΡΠ½ΠΎΠ²Π΅ Π΄Π°Π½Π½ΡΡ
Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡΠ΅ΠΉ ΠΏΠΎΠ»ΡΡΠ΅Π½Π° Π΄Π΅ΡΠΎΡΠΌΠ°ΡΠΈΠΎΠ½Π½Π°Ρ ΠΊΡΠΈΠ²Π°Ρ, ΠΏΠΎΠ·Π²ΠΎΠ»ΡΡΡΠ°Ρ ΠΏΡΠΎΠ³Π½ΠΎΠ·ΠΈΡΠΎΠ²Π°ΡΡ ΠΌΠ΅Ρ
Π°Π½ΠΈΡΠ΅ΡΠΊΠΎΠ΅ ΠΏΠΎΠ²Π΅Π΄Π΅Π½ΠΈΠ΅ ΠΈΠ·Π΄Π΅Π»ΠΈΡ ΠΈΠ· Π½ΠΈΠΊΠ΅Π»ΠΈΠ΄Π° ΡΠΈΡΠ°Π½Π°, Π½Π°ΠΏΡΠΈΠΌΠ΅Ρ, ΡΡΠ΅Π½ΡΠ° Π΄ΠΎ ΠΈ Π²ΠΎ Π²ΡΠ΅ΠΌΡ Π΅Π³ΠΎ ΠΈΠΌΠΏΠ»Π°Π½ΡΠ°ΡΠΈΠΈ Π² ΠΎΡΠ³Π°Π½ΠΈΠ·ΠΌ ΡΠ΅Π»ΠΎΠ²Π΅ΠΊΠ°. Π‘ΠΏΠ»Π°Π²Ρ Ρ ΠΏΠ°ΠΌΡΡΡΡ ΡΠΎΡΠΌΡ Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ TiNi ΡΠΈΡΠΎΠΊΠΎ ΠΏΡΠΈΠΌΠ΅Π½ΡΡΡΡΡ Π² ΡΠ°Π·Π»ΠΈΡΠ½ΡΡ
ΠΎΡΡΠ°ΡΠ»ΡΡ
ΠΌΠ΅Π΄ΠΈΡΠΈΠ½Ρ, Π² ΡΠ²ΡΠ·ΠΈ Ρ ΡΡΠΈΠΌ ΠΏΠ΅ΡΡΠΏΠ΅ΠΊΡΠΈΠ²Π½Ρ ΡΠ°Π·ΡΠ°Π±ΠΎΡΠΊΠΈ ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΏΡΠΈΠ΅ΠΌΠΎΠ² ΠΈΠ·Π³ΠΎΡΠΎΠ²Π»Π΅Π½ΠΈΡ ΠΈΠ·Π΄Π΅Π»ΠΈΠΉ ΠΈΠ· TiNi Ρ Π²ΡΡΠΎΠΊΠΈΠΌΠΈ ΠΏΠΎΠΊΠ°Π·Π°ΡΠ΅Π»ΡΠΌΠΈ ΠΊΠΎΡΡΠΎΠ·ΠΈΠΎΠ½Π½ΠΎΠΉ ΡΡΠΎΠΉΠΊΠΎΡΡΠΈ
ΠΠ°Π΄Π°Π½ΠΈΠ΅ ΡΡΠ½ΠΊΡΠΈΠΎΠ½Π°Π»ΡΠ½ΡΡ ΡΠ²ΠΎΠΉΡΡΠ² TiNi ΡΠΏΠ»Π°Π²Π°ΠΌ Π² ΠΏΡΠΎΡΠ΅ΡΡΠ΅ ΠΈΠΎΠ½Π½ΠΎ-ΠΏΠ»Π°Π·ΠΌΠ΅Π½Π½ΠΎΠ³ΠΎ ΠΎΡΠ°ΠΆΠ΄Π΅Π½ΠΈΡ ΠΏΠΎΠΊΡΡΡΠΈΠΉ
The aim of the present work is to study the influence of the technological parameters of the ion-plasma treatment (IPT) on the functional properties of a TiNi shape memory alloy and its biocompatibility. The object of the study was the Tiβ50.8 at. % Ni alloy, widely applied in medical devices. IPT was carried out by vacuum-arc evaporation of a titanium cathode at different values of the bias potential (0, β100, and β500 V), followed by TiN deposition. The functional properties of the TiNi alloy after IPT were investigated using differential scanning calorimetry. The biocompatible properties were evaluated using atomic emission spectrometry to measure a nickel concentration after one year holding TiN-coated TiNi samples in the 0.9 % NaCl solution. It has been determined that by setting the temperature regime of heating of Tiβ50.8 at. % Ni alloy samples due to the technological parameters of the IPT process, it is possible to change the interval of realization of thermoelastic martensitic transformations, and, consequently, the temperature response of devices made of this alloy, i. e. to set the necessary functional properties. The comparative analysis of the characteristic temperatures after heat and ion-plasma treatments allow us to conclude that the proposed method for calculation of the TiNi substrate temperature is correct at IPT. The calculated temperature of the TiNi samples was ~275 Β°C at the zero potential, which is sufficient to shift the characteristic temperatures of the alloy. The substrate temperature during deposition was ~400 Β°C at a β 100 V bias and above 600 Β°C at a β 500 V bias, respectively. The Ni concentration in the model solution did not exceed 0.14 mg/l after one year holding, which indicates the high biocompatibility of the TiN-coated TiNi samples.Π Π°Π±ΠΎΡΠ° ΠΏΠΎΡΠ²ΡΡΠ΅Π½Π° ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ Π²Π»ΠΈΡΠ½ΠΈΡ ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΎΠ² ΠΏΡΠΎΡΠ΅ΡΡΠ° ΠΈΠΎΠ½Π½ΠΎ-ΠΏΠ»Π°Π·ΠΌΠ΅Π½Π½ΠΎΠΉ ΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠΈ (ΠΠΠ) Π½Π° ΡΡΠ½ΠΊΡΠΈΠΎΠ½Π°Π»ΡΠ½ΡΠ΅ ΡΠ²ΠΎΠΉΡΡΠ²Π° TiNi ΡΠΏΠ»Π°Π²Π° Ρ ΡΡΡΠ΅ΠΊΡΠΎΠΌ ΠΏΠ°ΠΌΡΡΠΈ ΡΠΎΡΠΌΡ ΠΈ Π΅Π³ΠΎ Π±ΠΈΠΎΡΠΎΠ²ΠΌΠ΅ΡΡΠΈΠΌΠΎΡΡΡ. Π ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ ΠΎΠ±ΡΠ΅ΠΊΡΠ° ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ Π²ΡΠ±ΡΠ°Π½ ΡΠΏΠ»Π°Π² Tiβ50,8 Π°Ρ. % Ni, ΡΠΈΡΠΎΠΊΠΎ ΠΏΡΠΈΠΌΠ΅Π½ΡΠ΅ΠΌΡΠΉ Π² ΠΌΠ΅Π΄ΠΈΡΠΈΠ½ΡΠΊΠΈΡ
ΠΈΠ·Π΄Π΅Π»ΠΈΡΡ
ΠΈ ΡΡΡΡΠΎΠΉΡΡΠ²Π°Ρ
. ΠΠΎΠ½Π½ΠΎ-ΠΏΠ»Π°Π·ΠΌΠ΅Π½Π½ΡΡ ΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΡ ΠΎΡΡΡΠ΅ΡΡΠ²Π»ΡΠ»ΠΈ ΠΏΡΡΠ΅ΠΌ Π²Π°ΠΊΡΡΠΌΠ½ΠΎ-Π΄ΡΠ³ΠΎΠ²ΠΎΠ³ΠΎ ΠΈΡΠΏΠ°ΡΠ΅Π½ΠΈΡ ΠΊΠ°ΡΠΎΠ΄Π° ΠΈΠ· ΡΠΈΡΠ°Π½Π° ΠΏΡΠΈ Π·Π½Π°ΡΠ΅Π½ΠΈΡΡ
ΠΏΠΎΡΠ΅Π½ΡΠΈΠ°Π»Π° ΡΠΌΠ΅ΡΠ΅Π½ΠΈΡ 0, β100 ΠΈ β500 Π Ρ ΠΏΠΎΡΠ»Π΅Π΄ΡΡΡΠΈΠΌ ΠΎΡΠ°ΠΆΠ΄Π΅Π½ΠΈΠ΅ΠΌ Π·Π°ΡΠΈΡΠ½ΠΎ-Π΄Π΅ΠΊΠΎΡΠ°ΡΠΈΠ²Π½ΠΎΠ³ΠΎ TiN ΠΏΠΎΠΊΡΡΡΠΈΡ. ΠΠΎΠ½ΡΡΠΎΠ»ΡΠ½ΡΡ Π³ΡΡΠΏΠΏΡ ΠΎΠ±ΡΠ°Π·ΡΠΎΠ² ΠΏΠΎΠ΄Π²Π΅ΡΠ³Π°Π»ΠΈ ΡΠ΅ΡΠΌΠΎΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠ΅ ΠΏΡΠΈ ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΠ°Ρ
200β700 Β°Π‘ Π² ΡΠ΅ΡΠ΅Π½ΠΈΠ΅ 20 ΠΌΠΈΠ½. Π€ΡΠ½ΠΊΡΠΈΠΎΠ½Π°Π»ΡΠ½ΡΠ΅ ΡΠ²ΠΎΠΉΡΡΠ²Π° TiNi ΡΠΏΠ»Π°Π²Π° ΠΏΠΎΡΠ»Π΅ ΠΠΠ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π»ΠΈ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ Π΄ΠΈΡΡΠ΅ΡΠ΅Π½ΡΠΈΠ°Π»ΡΠ½ΠΎΠΉ ΡΠΊΠ°Π½ΠΈΡΡΡΡΠ΅ΠΉ ΠΊΠ°Π»ΠΎΡΠΈΠΌΠ΅ΡΡΠΈΠΈ. ΠΠΈΠΎΡΠΎΠ²ΠΌΠ΅ΡΡΠΈΠΌΡΠ΅ ΡΠ²ΠΎΠΉΡΡΠ²Π° ΠΎΡΠ΅Π½ΠΈΠ²Π°Π»ΠΈ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ Π°ΡΠΎΠΌΠ½ΠΎ-ΡΠΌΠΈΡΡΠΈΠΎΠ½Π½ΠΎΠΉ ΡΠΏΠ΅ΠΊΡΡΠΎΠΌΠ΅ΡΡΠΈΠΈ, ΠΈΠ·ΠΌΠ΅ΡΡΡ ΠΊΠΎΠ»ΠΈΡΠ΅ΡΡΠ²ΠΎ Π½ΠΈΠΊΠ΅Π»Ρ Π² 0,9 %-Π½ΠΎΠΌ ΡΠ°ΡΡΠ²ΠΎΡΠ΅ NaCl ΠΏΠΎΡΠ»Π΅ Π²ΡΠ΄Π΅ΡΠΆΠΊΠΈ Π² Π½Π΅ΠΌ TiNi ΠΎΠ±ΡΠ°Π·ΡΠΎΠ² Ρ TiN ΠΏΠΎΠΊΡΡΡΠΈΠ΅ΠΌ. Π£ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ, ΡΡΠΎ Π·Π°Π΄Π°Π²Π°Ρ ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΠ½ΡΠΉ ΡΠ΅ΠΆΠΈΠΌ Π½Π°Π³ΡΠ΅Π²Π° ΠΎΠ±ΡΠ°Π·ΡΠΎΠ² ΠΈΠ· ΡΠΏΠ»Π°Π²Π° Tiβ50,8 Π°Ρ. % Ni Π·Π° ΡΡΠ΅Ρ ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΎΠ² ΠΏΡΠΎΡΠ΅ΡΡΠ° ΠΠΠ, ΠΌΠΎΠΆΠ½ΠΎ ΠΌΠ΅Π½ΡΡΡ ΠΈΠ½ΡΠ΅ΡΠ²Π°Π» ΡΠ΅Π°Π»ΠΈΠ·Π°ΡΠΈΠΈ ΡΠ΅ΡΠΌΠΎΡΠΏΡΡΠ³ΠΈΡ
ΠΌΠ°ΡΡΠ΅Π½ΡΠΈΡΠ½ΡΡ
ΠΏΡΠ΅Π²ΡΠ°ΡΠ΅Π½ΠΈΠΉ, Π° ΡΠ»Π΅Π΄ΠΎΠ²Π°ΡΠ΅Π»ΡΠ½ΠΎ, ΠΈ ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΡ ΡΡΠ°Π±Π°ΡΡΠ²Π°Π½ΠΈΡ ΡΡΡΡΠΎΠΉΡΡΠ², ΠΈΠ·Π³ΠΎΡΠ°Π²Π»ΠΈΠ²Π°Π΅ΠΌΡΡ
ΠΈΠ· ΡΡΠΎΠ³ΠΎ ΡΠΏΠ»Π°Π²Π°, Ρ. Π΅. Π·Π°Π΄Π°Π²Π°ΡΡ ΠΈΠΌ Π½Π΅ΠΎΠ±Ρ
ΠΎΠ΄ΠΈΠΌΡΠ΅ ΡΡΠ½ΠΊΡΠΈΠΎΠ½Π°Π»ΡΠ½ΡΠ΅ ΡΠ²ΠΎΠΉΡΡΠ²Π°. Π‘ΠΎΠΏΠΎΡΡΠ°Π²ΠΈΡΠ΅Π»ΡΠ½ΡΠΉ Π°Π½Π°Π»ΠΈΠ· Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡ ΠΏΠΎΡΠ»Π΅ ΡΠ΅ΡΠΌΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΈ ΠΈΠΎΠ½Π½ΠΎ-ΠΏΠ»Π°Π·ΠΌΠ΅Π½Π½ΠΎΠΉ ΠΎΠ±ΡΠ°Π±ΠΎΡΠΎΠΊ ΠΏΠΎΠ·Π²ΠΎΠ»ΠΈΠ» ΡΠ΄Π΅Π»Π°ΡΡ Π²ΡΠ²ΠΎΠ΄ ΠΎ ΠΊΠΎΡΡΠ΅ΠΊΡΠ½ΠΎΡΡΠΈ ΠΏΡΠ΅Π΄Π»ΠΎΠΆΠ΅Π½Π½ΠΎΠ³ΠΎ ΠΌΠ΅ΡΠΎΠ΄Π° ΡΠ°ΡΡΠ΅ΡΠ° ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΡ TiNi ΠΏΠΎΠ΄Π»ΠΎΠΆΠΊΠΈ ΠΏΡΠΈ ΠΠΠ. Π Π°ΡΡΠ΅ΡΠ½Π°Ρ ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΠ° ΠΎΠ±ΡΠ°Π·ΡΠΎΠ² TiNi ΠΏΡΠΈ Π½ΡΠ»Π΅Π²ΠΎΠΌ ΠΏΠΎΡΠ΅Π½ΡΠΈΠ°Π»Π΅ ΡΠΎΡΡΠ°Π²ΠΈΠ»Π° ~275 Β°Π‘, ΡΡΠΎ Π΄ΠΎΡΡΠ°ΡΠΎΡΠ½ΠΎ Π΄Π»Ρ ΡΠΌΠ΅ΡΠ΅Π½ΠΈΡ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡ ΡΠΏΠ»Π°Π²Π°. ΠΡΠ°ΠΆΠ΄Π΅Π½ΠΈΠ΅ ΠΏΡΠΈ ΠΏΠΎΡΠ΅Π½ΡΠΈΠ°Π»Π΅ β100 Π ΠΎΠ±Π΅ΡΠΏΠ΅ΡΠΈΠ»ΠΎ Π½Π°Π³ΡΠ΅Π² ΠΏΠΎΠ΄Π»ΠΎΠΆΠΊΠΈ Π΄ΠΎ ~400 Β°Π‘, ΠΏΡΠΈ β500 Π β ΡΠ²ΡΡΠ΅ 600 Β°Π‘. ΠΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΠΈΡ Ni Π² ΠΌΠΎΠ΄Π΅Π»ΡΠ½ΠΎΠΌ ΡΠ°ΡΡΠ²ΠΎΡΠ΅ ΠΏΠΎΡΠ»Π΅ Π³ΠΎΠ΄ΠΎΠ²ΠΎΠΉ Π²ΡΠ΄Π΅ΡΠΆΠΊΠΈ Π½Π΅ ΠΏΡΠ΅Π²ΡΡΠ°Π»Π° 0,14 ΠΌΠ³/Π», ΡΡΠΎ ΡΠ²ΠΈΠ΄Π΅ΡΠ΅Π»ΡΡΡΠ²ΡΠ΅Ρ ΠΎ Π²ΡΡΠΎΠΊΠΎΠΉ Π±ΠΈΠΎΡΠΎΠ²ΠΌΠ΅ΡΡΠΈΠΌΠΎΡΡΠΈ TiNi ΡΠΏΠ»Π°Π²Π° Ρ TiN ΠΏΠΎΠΊΡΡΡΠΈΠ΅ΠΌ
Electrochemical behavior of TiN coatings on stainless steel and titanium nickelide articles for medical purposes
Titanium nitride (TiN) coatings which were fabricated by ion-plasma deposition on medical alloysβtitanium nickelide (TiNi) and stainless steel were the objects of this study. Their electrochemical and corrosion properties were studied by measuring steady-state potentials in solutions simulating an oral environment by means of a zero-resistance ammeter (ZRA) and the scanning vibrating electrode technique (SVET). The potential difference that arises in the simultaneous presence of structures made of different steel types or steel and titanium nickelide reaches the values higher than the threshold of human sensitivity (about 70 mV). It was found that the protective properties of TiN coatings on the stainless steel surface increase after their annealing at 300β400Β°Π‘ for different times. The titanium nickelideβtitanium nitride galvanic couple was shown to be electrochemically compatible under static conditions. The bending strain of higher than 4.5% was shown to impair the integrity of the titanium nitride layer on the surface of TiNi alloy and induce the potential shift in the negative direction thus deteriorating the corrosion properties of this material.publishe