Abstract:This work researches the influence of the nickel content on the structural and anticorrosive properties of ZrSiTiN films deposited by means of reactive co-sputtering on alloys of Ti6Al4V. The morphology and structure were analyzed by means of scanning electron microscopy (SEM) and X-ray diffraction (XRD), and the chemical composition was identified via X-ray scattering spectroscopy (EDS). The corrosion resistance was studied using potentiodynamic polarization (PP) tests employing a 3.5% by weight NaCl solution… Show more
“…In general, a compact, smooth, and homogeneous structure can be seen, without cracks and without delamination of the coating. According to the microstructure shown, it can be inferred that it is columnar, with a structural zone T where the formation of the film begins with the development of very small grains, where surface diffusion makes possible the migration of atoms between adjacent grains [20]. Figure 4 SEM micrographs of a cross-section of the microstructure of the Ti-Zr-Si-N film.…”
Section: Resultsmentioning
confidence: 99%
“…Rutile peaks of medium intensity can be seen at 27.44°, 54.34°, 56.66°, 62.97°, 74.53°, and 89.58°. The produced coating improved the resistance to oxidation due to its nanocomposite structure and also to the formation of a passive layer of silicon dioxide next to the titanium dioxide layer on the surface of this coating [20,28]. Figure 11 Cyclic oxidation diffractogram of the coating on Ti6Al4V alloy substrate (a) up to 50 cycles and (b) up to 300 cycles.…”
Section: Resultsmentioning
confidence: 99%
“…In this analysis, titanium exhibited the highest value, with 73.04%, followed by zirconium and silicon with 2.09% and 1.07%, respectively. Table 3 shows the crystallite size and the microdeformation of the coatings deposited on both substrates, which was determined using the Williamson-Hall method and the Debye-Scherrer equation [20]. It can be seen that for the (111) and (200) planes, the size varies between 18 and 23 nm for the coating deposited on 316Lsteel, while the size for the Ti-Zr-Si-N coating deposited on the Ti6Al4V alloy varies between 22 and 24 nm.…”
Section: Characterisation Of the Coatingsmentioning
confidence: 99%
“…Initially, at high temperatures, the adsorption of gaseous species occurs, in this case oxygen between the metal-substrate interface, generating micro-vacuums and vacancies resulting from the microstructural reorganisation of the coating with micro-vacuums through which the diffusion process between species is activated from the substrate towards the surface, resulting in the generation of non-homogeneous and isolated islands of metal oxides in the substrate-coating interface, which could protect it against degradation. Likewise, a process of microstructural transformation of the coating is activated, producing an evolution from the amorphous to the crystalline phase in the case of coatings with a high percentage of silicon [20]. By increasing the thermal cycles, the diffusion process increases inside the interface, producing anion movement subject to a gradient of electric potential caused by the oxygen and the temperature, which is absorbed and captured by the electrons on the surface of the interface.…”
Section: Cyclic Oxidation Testmentioning
confidence: 99%
“…The X-ray diffraction pattern did not show Si 3 N 4 peaks, which indicates its amorphous nature[17]; however, the incorporation of silicon into the ZrN-and Ti-based coatings is important, because it can increase the hardness, improve the resistance to oxidation, and reduce the coefficient of friction of the films[18]. Amorphous coatings such as a-Si 3 N 4 exhibit high corrosion resistance due to their dielectric nature and dense microstructure without preferential corrosion routes such as grain boundaries and other structural defects[19,20].Table2shows the EDS spectrometry analysis with the percentages of atomic concentration. The results indicate the presence of elements of the substrate such as Fe, Cr, and Ni for the coating deposited on 316L steel.…”
We present a study of the synthesis and an evaluation of the corrosion resistance of Ti-Zr-Si-N coatings deposited by means of the co-sputtering technique on 316L steel and Ti6Al4V alloy substrates. The thin films were obtained using Ti 5 Si 2 and Zr targets with 99.9% purity for the deposition, and a power of 200 W was applied in the DC source and 170 W in the RF source. The corrosion resistance was evaluated via the cyclic oxidation test with consistent cycles of 1 hour of cooling, 1 hour of heating, and 16 minutes of stabilisation for 300 cycles at a temperature of 600°. The coatings were characterised by means of scanning electron microscopy (SEM), X-ray diffraction (XRD), and confocal laser microscopy. The coating was effective up to 150 cycles for the case of 316L steel, and up to 50 cycles for the Ti6AlV alloy.
“…In general, a compact, smooth, and homogeneous structure can be seen, without cracks and without delamination of the coating. According to the microstructure shown, it can be inferred that it is columnar, with a structural zone T where the formation of the film begins with the development of very small grains, where surface diffusion makes possible the migration of atoms between adjacent grains [20]. Figure 4 SEM micrographs of a cross-section of the microstructure of the Ti-Zr-Si-N film.…”
Section: Resultsmentioning
confidence: 99%
“…Rutile peaks of medium intensity can be seen at 27.44°, 54.34°, 56.66°, 62.97°, 74.53°, and 89.58°. The produced coating improved the resistance to oxidation due to its nanocomposite structure and also to the formation of a passive layer of silicon dioxide next to the titanium dioxide layer on the surface of this coating [20,28]. Figure 11 Cyclic oxidation diffractogram of the coating on Ti6Al4V alloy substrate (a) up to 50 cycles and (b) up to 300 cycles.…”
Section: Resultsmentioning
confidence: 99%
“…In this analysis, titanium exhibited the highest value, with 73.04%, followed by zirconium and silicon with 2.09% and 1.07%, respectively. Table 3 shows the crystallite size and the microdeformation of the coatings deposited on both substrates, which was determined using the Williamson-Hall method and the Debye-Scherrer equation [20]. It can be seen that for the (111) and (200) planes, the size varies between 18 and 23 nm for the coating deposited on 316Lsteel, while the size for the Ti-Zr-Si-N coating deposited on the Ti6Al4V alloy varies between 22 and 24 nm.…”
Section: Characterisation Of the Coatingsmentioning
confidence: 99%
“…Initially, at high temperatures, the adsorption of gaseous species occurs, in this case oxygen between the metal-substrate interface, generating micro-vacuums and vacancies resulting from the microstructural reorganisation of the coating with micro-vacuums through which the diffusion process between species is activated from the substrate towards the surface, resulting in the generation of non-homogeneous and isolated islands of metal oxides in the substrate-coating interface, which could protect it against degradation. Likewise, a process of microstructural transformation of the coating is activated, producing an evolution from the amorphous to the crystalline phase in the case of coatings with a high percentage of silicon [20]. By increasing the thermal cycles, the diffusion process increases inside the interface, producing anion movement subject to a gradient of electric potential caused by the oxygen and the temperature, which is absorbed and captured by the electrons on the surface of the interface.…”
Section: Cyclic Oxidation Testmentioning
confidence: 99%
“…The X-ray diffraction pattern did not show Si 3 N 4 peaks, which indicates its amorphous nature[17]; however, the incorporation of silicon into the ZrN-and Ti-based coatings is important, because it can increase the hardness, improve the resistance to oxidation, and reduce the coefficient of friction of the films[18]. Amorphous coatings such as a-Si 3 N 4 exhibit high corrosion resistance due to their dielectric nature and dense microstructure without preferential corrosion routes such as grain boundaries and other structural defects[19,20].Table2shows the EDS spectrometry analysis with the percentages of atomic concentration. The results indicate the presence of elements of the substrate such as Fe, Cr, and Ni for the coating deposited on 316L steel.…”
We present a study of the synthesis and an evaluation of the corrosion resistance of Ti-Zr-Si-N coatings deposited by means of the co-sputtering technique on 316L steel and Ti6Al4V alloy substrates. The thin films were obtained using Ti 5 Si 2 and Zr targets with 99.9% purity for the deposition, and a power of 200 W was applied in the DC source and 170 W in the RF source. The corrosion resistance was evaluated via the cyclic oxidation test with consistent cycles of 1 hour of cooling, 1 hour of heating, and 16 minutes of stabilisation for 300 cycles at a temperature of 600°. The coatings were characterised by means of scanning electron microscopy (SEM), X-ray diffraction (XRD), and confocal laser microscopy. The coating was effective up to 150 cycles for the case of 316L steel, and up to 50 cycles for the Ti6AlV alloy.
The functional properties of the transition-metal nitride coatings can be modified by adding noble metals such as silver. The incorporation of these elements has been demonstrated to be a good strategy for improving the electrical, optical, and mechanical responses of transition-metal nitride coatings. In this investigation, we report the production of Ag-ZrSiN coatings with varying silver atomic contents, deposited using pulsed-DC reactive magnetron sputtering. The effect of the incorporation of silver on the microstructure, the morphology, and the optical and electrical properties was investigated. The results revealed a nanocomposite structure of Ag-ZrSiN with nc-Ag/nc-ZrN embedded in an amorphous SiNx phase. The electrical resistivity decreased upon the incorporation of Ag from 77.99 Ω·cm to 0.71 Ω·cm for 0.0 and 12.0 at.% of Ag, respectively. A similar decreasing trend was observed in the transmittance spectra of the coatings as the silver content increased. For the Ag-ZrSiN coating, the transmittance values decreased within the wavelength range of 2500–630 nm and then remained constant down to 300 nm, at about 13.7%. Upon further increase of the silver concentration up to 12 at.%, the transmittance values continued to decrease between 2500 and 630 nm, reaching approximately zero at 630 nm, indicating that the coating becomes opaque within that spectral range.
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