Accueil
Catégories
Ajouter le résultat dans votre panier Affiner la recherche
Etendre la recherche sur niveau(x) vers le bas
Biocompatibility and antibacterial performance of titanium by surface treatment / Jianxue Li in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 2 (03/2012)
[article]
Titre : Biocompatibility and antibacterial performance of titanium by surface treatment Type de document : texte imprimé Auteurs : Jianxue Li, Auteur ; Yimin Zhao, Auteur Année de publication : 2012 Article en page(s) : p. 223-228 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antibactériens
Biomatériaux
Implants médicaux
Oxydation micro-arc
Titane
Titane -- Alliages
Traîtements de surfaceIndex. décimale : 667.9 Revêtements et enduits Résumé : Titanium (Ti) and its alloys are used extensively in implants due to their excellent biocompatibility and mechanical properties. However, Ti-based implant materials have specific complications associated with their applications, such as the loosening of implanted host interface owing to unsatisfactory cell adhesion and the susceptibility of the implants to bacterial infections. Hence, a surface that displays selective biointeractivity, i.e., enhancing beneficial host cell responses but inhibiting pathogenic microbial adhesion, would be highly desirable. This study aims to confer long-lasting antibacterial properties and good biocompatibility on Ti via the microarc oxidation technique. The biocompatibility of the Ti surface was evaluated by cytotoxicity test, and the bacteriostasis rate was evaluated by antibacterial efficacy. The results showed that the implant surface might be nontoxic to cell and its long-lasting antibacterial properties could be significantly improved. These results indicate that such microarc oxidation coatings are expected to have good potential in transcutaneous implant applications. Note de contenu : - EXPERIMENTAL MATERIALS AND METHODS : Materials - MAO treatment - Surface characterization - Cell culture - Cytotoxicity - Determination of antibacterial efficacy - Statistical analysis
- RESULTS AND DISCUSSION : Surface morphology and chemical composition - Cytotoxicity of MAO coating - Antibacterial efficacy and crystalline structures of MAO coatingDOI : 10.1007/s11998-009-9221-1 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-009-9221-1.pdf?pdf=button Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=14376
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 9, N° 2 (03/2012) . - p. 223-228[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 14096 - Périodique Bibliothèque principale Documentaires Disponible Development of thin-film hydroxyapatite coatings with an intermediate shellac layer produced by dip-coating process on Ti6Al4V implant materials / A. Ritwik in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 2 (03/2022)
[article]
Titre : Development of thin-film hydroxyapatite coatings with an intermediate shellac layer produced by dip-coating process on Ti6Al4V implant materials Type de document : texte imprimé Auteurs : A. Ritwik, Auteur ; K. K. Saju, Auteur ; Ajith Vengellur, Auteur ; P. P. Saipriya, Auteur Année de publication : 2022 Article en page(s) : p. 597-605 Langues : Américain (ame) Catégories : Adhésion
Dip-coating
Gomme-laque
HydroxyapatiteL'hydroxyapatite est une espèce minérale de la famille des phosphates, de formule Ca5(PO4)3(OH), usuellement écrite Ca10(PO4)6(OH)2 pour souligner le fait que la maille de la structure cristalline comprend deux molécules. L'hydroxyapatite est le membre hydroxylé du groupe apatite. L'ion OH- peut être remplacé par le fluor, le chlore ou le carbonate.
L'hydroxyapatite cristallise dans le système hexagonal. La poudre d'hydroxyapatite pure est blanche. Celles que l'on trouve dans la nature peuvent cependant être de couleur marron, jaune ou verte.
Métaux -- Revêtements
Titane -- AlliagesIndex. décimale : 667.9 Revêtements et enduits Résumé : A thin layer of hydroxyapatite (HAp) coating has been developed on Ti6Al4V substrates using a dip-coating process. An intermediate layer of shellac (natural resin) was applied in between the substrate and the coating film to improve the adhesion strength without the need for any secondary annealing process. The adhesion strength was measured as 7.14 MPa. The surface of the developed coating was characterized using a scanning electron microscope. The total coating thickness was found to be 30 microns, and the surface roughness parameters were measured as 0.93 μm (Ra), 1.17 μm (Rq), and 6.67 μm (Rz). The dip-coated samples were also subjected to dissolution behavior study and in vitro study. The measured parameters of the coating suggest the use of this method as an alternative to other expensive and temperature-dependent coating methods for producing HAp coating with better adhesion strength. Note de contenu : - Table 1 : Adhesion strength & coating thickness
- Table 2 : The dissolution rate of Ca and P ions for the different time periods
- Table 3 : Atomic% of Ca and P in coated substrate immersed in SBF for different time periodsDOI : https://doi.org/10.1007/s11998-021-00549-y En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00549-y.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37290
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 2 (03/2022) . - p. 597-605[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 23408 - Périodique Bibliothèque principale Documentaires Disponible Effect of vitreous enamel coating on the oxidation behavior of Ti6A14V and TiAl alloys at high temperatures / Yuming Xiong in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 5, N° 1 (03/2008)
[article]
Titre : Effect of vitreous enamel coating on the oxidation behavior of Ti6A14V and TiAl alloys at high temperatures Type de document : texte imprimé Auteurs : Yuming Xiong, Auteur ; Shenglong Zhu, Auteur ; Fuhui Wang, Auteur ; Changhee Lee, Auteur Année de publication : 2008 Article en page(s) : p. 93-98 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Chimie des surfaces
Métaux -- Revêtements protecteurs
Oxydation
Revêtement émail
Titane -- AlliagesIndex. décimale : 667.9 Revêtements et enduits Résumé : Vitreous enamel coating is a promising candidate as a high temperature protective coating for titanium (Ti)-based alloys due to its high thermochemical stability, compatibility, and matching thermal expansion coefficient to the substrates. Vitreous enamel coating is economically attractive because of its low cost and easy handling. The oxidation behavior of Ti6A14V (at 700°C) and Ti-48Al (at 800-900°C), with and without the vitreous enamel coating exposed to air, are investigated in this article. The results show that the vitreous enamel coating could markedly protect the substrate (Ti6Al4V and Ti48Al) from oxidation at elevated temperatures. In comparison, the TiAlCr coating might not provide long-term protection for the Ti6Al4V alloys due to the heavy interfacial interdiffusion at high temperatures, although a protective Al2O3 scale could form at the initial oxidation stage. The vitreous enamel coating remains intact, uniform, compact, and adhesive to the substrate, however, with undetectable interfacial reaction after oxidation. It is also worth noting that some new phases form in the coating during oxidation at 900°C, although the protectiveness of the coating seems to be unaffected. DOI : 10.1007/s11998-007-9057-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-007-9057-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3619
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 5, N° 1 (03/2008) . - p. 93-98[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 009979 - Périodique Bibliothèque principale Documentaires Disponible Microstructure and thermal cycling behavior of thermal barrier coating on near-a titanium alloy / Bo He in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 3 (09/2007)
[article]
Titre : Microstructure and thermal cycling behavior of thermal barrier coating on near-a titanium alloy Type de document : texte imprimé Auteurs : Bo He, Auteur ; Fei Li, Auteur ; Hong Zhou, Auteur ; Yongbing Dai, Auteur ; Bao-de Sun, Auteur Année de publication : 2007 Article en page(s) : p. 335-340 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Dépôt en phase vapeur
Matériaux -- Propriétés barrières
Protection thermique
Rayonnement électronique
Titane -- AlliagesIndex. décimale : 667.9 Revêtements et enduits Résumé : Two kinds of thermal barrier coatings (TBCs), consisting of NiCoCrAlY bond coats (BCs) deposited by electron beam-physical vapor deposition (EB-PVD) and high velocity oxy-fuel (HVOF) thermal spraying, respectively, and top 8 wt%oY2O3-ZrO2 (8YSZ) ceramic layers deposited by EB-PVD were prepared on near-a titanium alloys. The field emission scanning electronic microscopy and microhardness indentation are used to study the microstructure and microhardness. Different failure features including cracking patterns and the delamination degree of these two TBCs are discussed according to the thermal cycling tests in the atmosphere. It is found that the morphology of the two BCs deposited by different methods (EB-PVD and HVOF) determines the microstructure and microhardness of their corresponding top 8YSZ layers. The BC prepared by EB-PVD is dense and homogeneous, which leads to a dense and hard 8YSZ with clustered slim columnar grains. The BC prepared by HVOF, however, is porous and inhomogeneous in microstructure and, as a result, the top ceramic layer is loose with low microhardness and clustered coarse columnar grains. DOI : 10.1007/s11998-007-9046-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-007-9046-8.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3649
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 4, N° 3 (09/2007) . - p. 335-340[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 008270 - Périodique Bibliothèque principale Documentaires Disponible Palladium and tantalum aluminide coatings for high-temperature oxidation resistance of titanium alloy / Gurrappa Injeti in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 6, N° 2 (06/2009)
[article]
Titre : Palladium and tantalum aluminide coatings for high-temperature oxidation resistance of titanium alloy Type de document : texte imprimé Auteurs : Gurrappa Injeti, Auteur ; A. Wilson, Auteur ; P. K. Datta, Auteur Année de publication : 2009 Article en page(s) : p. 257-268 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aluminiage
Oxydation
Palladium
Résistance des matériaux
Revêtement métallique -- Effets des hautes températures
Revêtements protecteurs
TantaleLe tantale est un élément chimique du tableau périodique, de symbole Ta et de numéro atomique 73. Ce métal de transition gris-bleu9, lourd, ductile, très dur, très résistant à la corrosion des acides, est également un bon conducteur de chaleur et d'électricité. On le trouve dans le minéral appelé tantalite et dans certains minerais complexes sous forme d'oxyde, associé au niobium, notamment dans le coltan, de couleur noire.
Le tantale est utilisé pour la fabrication d'instruments chirurgicaux et d'implants car il ne réagit pas avec les fluides corporels. Il est très connu en électronique pour la fabrication de condensateurs dits « gouttes de tantale », ainsi nommés à cause de leur forme facilement reconnaissable et qui ont la capacité la plus importante par rapport à la taille.
Cet élément a un point de fusion élevé qui n'est dépassé que par le tungstène, le carbone et le rhénium (point de fusion à 3 016,85 °C, point d'ébullition 5 457,85 °C).
Titane -- AlliagesIndex. décimale : 667.9 Revêtements et enduits Résumé : The present article explains the efforts made in developing new protective coatings based on palladium, tantalum, and aluminum with considerably improved oxidation resistance for effective protection of titanium alloy IMI 834. Systematic characterization was carried out on as-prepared as well as oxidized coatings and these results are presented. The performance of new coatings was evaluated by generating weight-gain data as a function of time followed by detailed characterization in order to confirm the ability of the coatings to prevent oxidation and alpha-case formation. The results showed that tantalum aluminide and simple aluminide coatings exhibit improved oxidation resistance when compared to palladium aluminide. Finally, the advantages of developed new coatings and the necessity of their use in modern gas turbine engines that allow the alloy to be used safely at high temperatures, which in turn would enhance the efficiency of gas-turbine engine-compressor sections, will be stressed. DOI : 10.1007/s11998-008-9113-9 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-008-9113-9.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5640
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 6, N° 2 (06/2009) . - p. 257-268[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 011361 - Périodique Bibliothèque principale Documentaires Disponible Thermal failure of thermal barrier coating with thermal sprayed bond coating on titanium alloy / Bo He in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 5, N° 1 (03/2008)
Permalink