scholarly journals Morphology, Topography and Wettability of CP-Ti after Anodization Process for Biomedical Applications

2021 ◽  
Vol 1973 (1) ◽  
pp. 012006
Author(s):  
A N Najim ◽  
M T Mohammed ◽  
M A Albozahid
Keyword(s):  
Biomedical Applications ◽  
Anodization Process ◽  
Cp Ti

Anodic synthesis of TiO2 nanotubes by step-up voltages

2021 ◽  
pp. 002199832110237
Author(s):  
V Sivaprakash ◽  
R Narayanan
Keyword(s):  
Corrosion Resistance ◽  
Tio2 Nanotubes ◽  
Biomedical Applications ◽  
Phase Changes ◽  
Electrochemical Anodization ◽  
Corrosion Resistant ◽  
Anodization Process ◽  
Anodic Synthesis ◽  
Input Potential

Fabrication of TiO2 nanotubes (NTs) has extensive application properties due to their high corrosion resistant and compatibility with biomedical applications, the synthesis of TiO2 nanotubes over titanium has drawn interest in various fields. The synthesis of TiO2 NTs using novel in-situ step-up voltage conditions in the electrochemical anodization process is recorded in this work. For manufacturing the NTs at 1 hour of anodization, the input potential of 30, 40 and 50 V was selected. With increasing step-up voltage during the anodization process, an improvement in the NTs was observed, favoring corrosion resistance properties. The surface of NTs enhances the structure of the ribs, raising the potential for feedback over time. XRD was used to analyze phase changes, and HR-SEM analyzed surface topography. Impedance tests found that longer NTs improved the corrosion resistance.

Pack Cementation Treatment of Titanium Using Tetracalcium Phosphate Powder for Biomedical Applications

2010 ◽  
Vol 654-656 ◽  
pp. 2172-2175
Author(s):  
Kyosuke Ueda ◽  
Hajime Suto ◽  
Kaori Nakaie ◽  
Takayuki Narushima
Keyword(s):  
Reaction Layer ◽  
Biomedical Applications ◽  
Pure Titanium ◽  
Pack Cementation ◽  
Apatite Formation ◽  
Commercially Pure Titanium ◽  
Tetracalcium Phosphate ◽  
Phosphate Powder ◽  
Commercially Pure ◽  
Cp Ti

The surface modification of commercially pure titanium (CP Ti) by pack cementation treatment at 973 K using tetracalcium phosphate (Ca4(PO4)2O, TTCP) slurry was investigated. An HAp phase and a CaTiO3 phase were observed on the reaction layer of the CP Ti substrate after pack cementation treatment at 973 K for 86.4 ks. TTCP powder decomposed to HAp and CaO, and CaO reacted with TiO2 to form CaTiO3. The reaction layer on the CP Ti substrate consisted of inner and outer layers and the particles were in the outer reaction layer. The pores observed on the reaction layer were formed by the detachment of particles from the outer layer. The bonding strength of the reaction layer was 68.1 MPa. Apatite completely covered the surface of the pack-cementation-treated CP Ti after immersion in Kokubo solution for 21.6 ks; such rapid apatite formation suggests that pack cementation treatment improves the biocompatibility of titanium.

Development and Characterization of New Ti-25Ta-Zr Alloys for Biomedical Applications

2021 ◽  
Vol 1016 ◽  
pp. 137-144
Author(s):  
Pedro Akira Bazaglia Kuroda ◽  
Fernanda de Freitas Quadros ◽  
Mycaela Vieira Nascimento ◽  
Carlos Roberto Grandini
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Elastic Modulus ◽  
Biomedical Applications ◽  
Solution Heat Treatment ◽  
High Hardness ◽  
Microstructural Characterization ◽  
Β Phase ◽  
Cp Ti ◽  
Microscopy Techniques

This paper deals with the study of the development, structural and microstructural characterization and, selected mechanical properties of Ti-25Ta-50Zr alloy for biomedical applications. The alloy was melted in an arc furnace and various solution heat treatments were performed to analyze the influence of the temperature and time on the structure, microstructure, microhardness and elastic modulus of the samples. The structural and microstructural results, obtained by X-ray diffraction and microscopy techniques, showed that the solution heat treatment performed at high temperatures induces the formation of the β phase, while solution heat treatment performed at low temperatures induces the formation of the α” and ω metastable phases. Regarding the effect of time, samples subjected to heat treatment for 6 hours have only the β phase, indicating that lengthy treatments suppress the α” phase. Regarding the hardness and elastic modulus, the alloy with the α” and ω phases, after treatment performed at a temperature of 500 °C, has a high hardness value and elastic modulus due to the presence of the ω phase that hardens and weakens alloys. The titanium alloys developed in this study have excellent mechanical properties results for use in the orthopedic area, better than many commercial materials such as cp-Ti, stainless steel and Co-Cr alloys.

scholarly journals Wear behavior of oxidized Ti-48Al-2Cr-2Nb (at. %), Ti-6Al-4V and Cp-Ti under dry and lubricated conditions

2015 ◽  
Vol 2 (1) ◽  
pp. 39
Author(s):  
Carlos R. Ramos-Saenz ◽  
Paul A. Sundaram
Keyword(s):  
Titanium Aluminide ◽  
Biomedical Applications ◽  
Tial Alloy ◽  
Wear Behavior ◽  
Gamma Titanium Aluminide ◽  
Oxidation In Air ◽  
Joint Prostheses ◽  
Cp Ti ◽  
Tribomechanical Properties ◽  
Wear Tests

Gamma titanium aluminide (gamma-TiAl) is a titanium alloy which contains no vanadium and appears to have potential for biomedical applications such as joint prostheses. The tribomechanical properties of Ti-48Al-2Cr-2Nb (at. %) (gamma-TiAl) subjected to oxidation in air at 500°C and 800°C were determined by standard wear tests using a hardened stainless steel (SS) pin in a linearly reciprocating mode under both dry and lubricated (Ringer’s solution) media. Similar properties for CP-Ti and Ti-6Al-4V were measured for comparison.  The lowest mean mass loss was obtained for oxidized gamma-TiAl alloy indicating excellent wear resistance. The dominant wear mechanism on all the Ti alloy samples was abrasion.  The oxidation temperature had a minimal effect on the wear of gamma-TiAl but was significant for the other two alloys.

Biocompatibility of Anodized Low-Cost Ti-4.7Mo-4.5Fe Alloy

2021 ◽  
Vol 1016 ◽  
pp. 458-464
Author(s):  
Yasser Abdelrhman ◽  
Sengo Kobayashi ◽  
Satoshi Okano ◽  
Takeaki Okamoto ◽  
Mohamed Abdel-Hady Gepreel
Keyword(s):  
Titanium Alloys ◽  
Biomedical Applications ◽  
Low Cost ◽  
Electrochemical Anodization ◽  
Cell Counting ◽  
Promising Candidate ◽  
Nanostructured Surfaces ◽  
Self Organized ◽  
Anodization Process

Self-organized TiO2 nanotubes were generated on the surface of the designed alloy Ti-4.7Mo-4.5Fe (TMF55) by electrochemical anodization process to investigate the effect of nanostructured on the biocompatibility. The biocompatibility of the designed alloys showed very promising results compared to those of Ti-6Al-4V ELI alloy, especially for the untreated and nanostructured surfaces of the specimens with diameter size less than 35 nm. By increasing the diameter of nanotube, the biocompatibility is decreased. The most convenient compatible alloy was in favor of TMF8 alloy, making this V-free low-cost alloy is a promising candidate for replacing the commercial Ti-6Al-4V ELI alloy in biomedical applications. Keywords: Self-organized TiO2 nanotubes, biocompatibility, Titanium alloys, Cell Counting Kit-8, WST-8 assay.

Severe Plastic Deformation of Commercial Pure Titanium (CP-Ti) for Biomedical Applications: A Brief Review

JOM ◽  
2017 ◽  
Vol 71 (1) ◽  
pp. 256-263 ◽  
Author(s):  
Reza Mahmoodian ◽  
N. Syahira M. Annuar ◽  
Ghader Faraji ◽  
Nadia Dayana Bahar ◽  
Bushroa Abd Razak ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Biomedical Applications ◽  
Pure Titanium ◽  
Commercial Pure Titanium ◽  
Cp Ti

Tribological and electrochemical behavior of Ag2O/ZnO/NiO nanocomposite coating on commercial pure titanium for biomedical applications

2019 ◽  
Vol 71 (10) ◽  
pp. 1166-1176
Author(s):  
Onur Çomakli ◽  
Mustafa Yazici ◽  
Tuba Yetim ◽  
Fatih Yetim ◽  
Ayhan Celik
Keyword(s):  
Biomedical Applications ◽  
Pure Titanium ◽  
Surface Hardness ◽  
Nanocomposite Coating ◽  
Titanium Implants ◽  
Nanocomposite Films ◽  
Commercially Pure Titanium ◽  
Content Type ◽  
Commercially Pure ◽  
Cp Ti

Purpose This paper aims to investigate the structural, tribological and electrochemical properties of Ag2O, ZnO, NiO coatings and Ag2O/ZnO/NiO nanocomposite films deposited on commercially pure titanium. Design/methodology/approach Ceramic thin films (Ag2O, ZnO, NiO coatings and Ag2O/ZnO/NiO nanocomposite film) were deposited on commercially pure titanium (CP-Ti) substrate. Surface characterization of the uncoated and coated samples was made by structural surveys (scanning electron microscopic examinations and X-ray diffraction analyses), hardness measurements, tribological and corrosion experiments. Findings Results were indicated that sol-gel coatings improved the wear and corrosion resistance of CP-Ti, and the best results were seen at the nanocomposite coating. It may be attributed to its small grain size, high surface hardness and high film thickness. Originality/value This study can be a practical reference and offers insight into the influence of nanocomposite ceramic films on the increase of hardness, tribological and corrosion performance. Also, the paper displayed a promising approach to produce Ag2O/ZnO/NiO nanocomposite coating on commercially pure titanium implants for biomedical applications.

Nanocomposited and Functionally Graded ZrN/HA Coatings on cp-Ti by RF Magnetron Sputtering

2012 ◽  
Vol 248 ◽  
pp. 37-42 ◽  
Author(s):  
A. Joseph Nathanael ◽  
Jun Hee Lee ◽  
Sun Ig Hong
Keyword(s):  
Crystallite Size ◽  
Biomedical Applications ◽  
Rf Magnetron Sputtering ◽  
Nanocomposite Coating ◽  
Functionally Graded ◽  
Nanocomposite Coatings ◽  
Hydroxyapatite Coatings ◽  
Graded Coatings ◽  
Functionally Graded Coatings ◽  
Cp Ti

Nanocomposited and Functionally graded (FG) ZrN/hydroxyapatite coatings with good mechanical strength and biocompatibility were prepared on cp-Ti substrate for biomedical applications and detailed analysis of the nanocomposite coatings for its structural, morphological, topographical and biocompatibility properties were carried out. Crystallite size of the coating for the functionally graded coatings was smaller compared to that of nanocomposite coatings. The arrangement of grains was observed to be denser in the FG coatings due to the decrease in the grain size. Hardness and modulus of FG coatings were observed to be greater than those of nanocomposite coating, which was attributed to the reduction in the crystallite size in FG coatings. Both ZrN/HA nanocomposite and functionally graded coatings was found to induce biomineralization formation, suggesting both are promising candidates for the future biomedical applications.

Workability Limits of Commercial Purity Titanium Subjected to Equal Channel Angular Pressing

2008 ◽  
Vol 584-586 ◽  
pp. 275-280 ◽  
Author(s):  
G.V. Preetham Kumar ◽  
Chakkingal Uday
Keyword(s):  
Equal Channel Angular Pressing ◽  
Biomedical Applications ◽  
Processing Route ◽  
Commercial Purity ◽  
Specific Strength ◽  
Warm Working ◽  
Angular Pressing ◽  
High Specific Strength ◽  
Commercial Purity Titanium ◽  
Cp Ti

Commercial purity Ti is an important candidate material for orthopedic and dental implants because of its high specific strength, good corrosion resistance and excellent biocompatibility. However, for biomedical applications as a replacement for Ti-6Al-4V alloy that is currently used, improvement in strength of CP Ti is necessary. This can be achieved by using severe plastic deformation (SPD) processes like equal channel angular pressing (ECAP) at warm working temperatures followed by conventional processing at room temperatures. This requires adequate workability after ECAP. In this study, the workability of CP Ti after warm ECAP has been investigated. Specimens of CP Ti, 17 mm in diameter, were extruded using processing route Bc through an ECAP die with an angle of 120◦ between the two intersecting channels and at a temperature of approximately 400oC. Workability testing was carried out using collar type compression specimens by upsetting the specimens between flat platens till the onset of cracking. Workability diagrams have been plotted as a function of axial and hoop strains at failure. The results show that processing by ECAP lead to only minor reductions in workability of CP Ti. The tensile strength is enhanced considerably by this process.

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