Structure and Resistance to Electrochemical Corrosion of NiTi Alloy

Łosiewicz, B.; Popczyk, Magdalena; Goryczka, Tomasz; Lelątko, J.; Smołka, Agnieszka; Kowalski, P.

doi:10.4028/www.scientific.net/ssp.203-204.335

Cited by 8 publications

(8 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Before the EPD of hydroxyapatite, the NiTi implant surface was passivated in an autoclave. As a result of autoclaving, a self-passivating amorphous TiO 2 layer was obtained on the surface of the NiTi alloy, which primarily improves the corrosion resistance of the alloy [ 8 , 25 , 26 , 27 , 28 ]. The layer of titanium oxides reached a thickness of approx.…”

Section: Resultsmentioning

confidence: 99%

“…The layer of titanium oxides reached a thickness of approx. 3.5 nm, shows good adhesion to the metallic substrate, is homogeneous along the entire length and has the ability to be used in dynamic conditions [ 6 , 27 , 28 ]. The implant’s surface was next modified by the deposition of hydroxyapatite using electrophoretic deposition method (EPD) method.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Functionalization of the Implant Surface Made of NiTi Shape Memory Alloy

et al. 2023

View full text Add to dashboard Cite

To functionalize and improve the biocompatibility of the surface of a medical implant made of NiTi shape memory alloy and used in practice, a clamp, multifunctional layers composed of amorphous TiO2 interlayer, and a hydroxyapatite coating were produced. Electrophoresis, as an efficient method of surface modification, resulted in the formation of a uniform coating under a voltage of 60 V and deposition time of 30 s over the entire volume of the implant. The applied heat treatment (800 °C/2 h) let toa dense, crack-free, well-adhered HAp coating with a thickness of ca. 1.5 μm. and a high crack resistance to deformation associated with the induction of the shape memory effect in the in the deformation range similar to the real implant work after implantation. Moreover, the obtained coating featured a hydrophilic (CA = 59.4 ± 0.3°) and high biocompatibility.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Functionalization of the Implant Surface Made of NiTi Shape Memory Alloy

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Before deposition, the sample surfaces were thoroughly cleaned in acetone using an ultrasonic bath to eliminate trace amounts of impurities. Subsequently, the samples were passivated in an autoclave at 134 • C for 30 min for enhanced corrosion resistance, forming a thin, corrosion-resistant amorphous titanium oxide layer on their surfaces [18].…”

Section: Niti Substratementioning

confidence: 99%

Synthesis and Characterization of Silica-Titanium Oxide Nano-Coating on NiTi Alloy

Dudek,

Dulski,

Podwórny

et al. 2024

Coatings

View full text Add to dashboard Cite

To functionalize the surface of the NiTi alloy, hybrid layers comprising nanometric silica and titanium oxides were synthesized. The TiO2–SiO2 nanosystem was chemically prepared and utilized for electrophoretic deposition (EPD) to create multifunctional layers on the alloy surface. The impact of pH on Zeta potential and ceramic particle size was explored to ensure a stable colloidal suspension for EPD, with optimal parameters established at a pH of approximately 6. A uniform layer was formed by applying a voltage of 40 V for 3 min, appearing as a thin film interspersed with regularly spaced larger agglomerates. The thin film primarily consisted of a minor fraction of defective rutile nanoparticles, accompanied by silica and carbon agglomerates from the nanosystem synthesis process. Heat treatment at 800 °C for 2 h induced significant structural changes, developing a novel-generation material with a different structure. An interlayer with strong Si–O–Ti connections was formed. Moreover, the mechanism of layer formation was extensively discussed.

show abstract

“…Before deposition, the surface of the samples was washed in acetone in an ultrasonic bath to remove trace amounts of impurities. Then, to improve the corrosion resistance, they were passivated in an autoclave at 134 • C for 30 min to form a protective corrosion-resistive thin amorphous TiO 2 layer on their surface [18,19].…”

Section: Substratementioning

confidence: 99%

Optimization of the Electrophoretic Deposition Parameters and Mechanism of Formation of Ag-TiO2 Nanocoatings on a NiTi Shape Memory Alloy: Part I

Dudek,

Dulski,

Podwórny

et al. 2023

Coatings

View full text Add to dashboard Cite

This paper reports research findings on the functionalization of NiTi shape memory alloy through the electrophoretic deposition of innovative complex layers comprising a silver-rutile (Ag-TiO2) nanocomposite. A colloidal suspension of a chemically synthesized Ag-TiO2 nanosystem prepared with a 59.4 ± 0.9 mV Zeta potential for anaphoretic deposition. Employing a design of experiment method (DoE), the optimal parameters for uniform coating depositions were identified as 40 V/3 min. Dilatometric tests and high-temperature microscopy determined that the deposited layers’ heat treatment temperature should not exceed 800 °C. Raman spectrometry and scanning electron microscopy (SEM) provided comprehensive structural and morphological insights into the resulting continuous and crack-free layer. The article extensively explores the impact of annealing on structural changes within the layer, proposing mechanisms for its formation. The findings affirm the feasibility of creating a highly reactive layer on the NiTi alloy, holding potential significance in implantation medicine.

show abstract

Structure and Resistance to Electrochemical Corrosion of NiTi Alloy

Cited by 8 publications

References 4 publications

Functionalization of the Implant Surface Made of NiTi Shape Memory Alloy

Functionalization of the Implant Surface Made of NiTi Shape Memory Alloy

Synthesis and Characterization of Silica-Titanium Oxide Nano-Coating on NiTi Alloy

Optimization of the Electrophoretic Deposition Parameters and Mechanism of Formation of Ag-TiO2 Nanocoatings on a NiTi Shape Memory Alloy: Part I

Contact Info

Product

Resources

About