Interface in Hydroxylapatite Coated Ti6Al4V Alloys

Volume 1 ◽  
2004 ◽  
Author(s):  
Celalettin Ergun ◽  
Zafer Evis ◽  
Robert H. Doremus
Keyword(s):  
Thermal Analysis ◽  
Calcium Phosphate ◽  
Titanium Oxide ◽  
Titanium Powder ◽  
Hot Isostatic Pressing ◽  
Interface Reaction ◽  
Metallic Titanium ◽  
Epma Analysis ◽  
Line Scanning ◽  
Hydroxylapatite Coatings

The aim of the present study is to develop a better understanding of the interface reaction between hydroxylapatite and Ti6Al4V alloys. Hydroxylapatite coatings on Ti6Al4V, Hydroxylapatite-metallic titanium powder, hydroxylapatite-titania composites were prepared via air sintering and/or hot isostatic pressing (HIP). The reaction between components was monitored with EPMA line scanning technique, XRD, and thermal analysis. EPMA analysis on the interface between the hydroxylapatite and Ti6Al4V alloy showed interdiffusion profiles of all the hydroxylapatite and alloy elements suggesting interfacial bonding. The experiments on the composites showed no significant reaction between hydroxylapatite and metallic titanium in the vacuum environment. However, a reaction occurred between hydroxylapatite and titanium oxide, which formed CaTiO3 with a perovskite structure, Ca3(PO4)2 (tri-calcium phosphate; whitlockite) and water. Presence of air in the sintering environment promoted this reaction.

Photo-electrochemistry of metallic titanium/mixed phase titanium oxide

2021 ◽  
Author(s):  
Sara Amouzad ◽  
Mehdi Khosravi ◽  
Niaz Monadi ◽  
Behzad Haghighi ◽  
Suleyman I. Allakhverdiev ◽  
...  
Keyword(s):  
Titanium Oxide ◽  
Mixed Phase ◽  
Metallic Titanium

Mineralization Behavior of Bioactive Ceramic Coatings Formed by Micro-Arc Oxidation on Titanium

2007 ◽  
Vol 330-332 ◽  
pp. 629-632 ◽  
Author(s):  
Kai Hui Nan ◽  
G.X. Pei
Keyword(s):  
Calcium Phosphate ◽  
Simulated Body Fluid ◽  
Titanium Oxide ◽  
Body Fluid ◽  
Ceramic Coatings ◽  
P Elements ◽  
Micro Arc Oxidation ◽  
Bioactive Ceramic ◽  
The Difference ◽  
Titanium Oxide Films

Titanium oxide films were obtained by MAO at the applied voltages of 250-550V and their bio-mineralization behavior was investigated. The films were composed mainly of TiO2 phases in the form of anatase and rutile and enriched with Ca and P elements in the form of CaTiO3 and amorphous calcium phosphate. Their bio-mineralization behavior was evaluated in a simulated body fluid (SBF). After immersed in SBF for 72 h, white mineralized layers were observed on the samples obtained at high voltages. The bio-mineralized rate of samples increased with the applied voltages, which resulted in the difference on morphology of different samples. The structure and composition of the films have an important effect on their bio-mineralization behavior.

Physical and Mechanical Properties of Mullite-Whisker Reinforced Alumina Composites

2007 ◽  
Vol 334-335 ◽  
pp. 325-328 ◽  
Author(s):  
Wei Kong Pang ◽  
Nobuo Tezuka ◽  
It Meng Low ◽  
E.G. Mehrtens ◽  
Bruno A. Latella
Keyword(s):  
Mechanical Properties ◽  
Thermal Analysis ◽  
Hot Isostatic Pressing ◽  
Physical And Mechanical Properties ◽  
Reaction Sintering ◽  
Alumina Matrix ◽  
Young’S Moduli ◽  
Solid Density ◽  
Alumina Composites

Reaction sintering and hot-isostatic-pressing (HIP) have been used for the compaction and densification of mullite-whisker-reinforced alumina composites. The effect of alumina matrix constraints on the in-situ transformation sequence in alumina-halloysite-AlF3 system was studied using differential thermal analysis. The physical and mechanical properties of the HIPed samples have been characterized in terms of bulk density, apparent solid density, porosity, Young’s moduli, flexural strength, hardness and the fracture toughness.

scholarly journals Simultaneous anodization/anaphoretic electrodeposition synthesis of nano calcium phosphate/titanium oxide composite coatings assisted with chitosan oligosaccharide lactate

2020 ◽  
Vol 261 ◽  
pp. 127121 ◽  
Author(s):  
Marijana R. Pantović Pavlović ◽  
Miroslav M. Pavlović ◽  
Sanja Eraković ◽  
Jasmina S. Stevanović ◽  
Vladimir V. Panić ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Titanium Oxide ◽  
Composite Coatings ◽  
Chitosan Oligosaccharide ◽  
Oxide Composite

Antibacterial Titanium/Calcium Phosphate Implant Surfaces

2008 ◽  
Vol 396-398 ◽  
pp. 299-302 ◽  
Author(s):  
Cornelia Prinz ◽  
Hans Georg Neumann
Keyword(s):  
Calcium Phosphate ◽  
Titanium Oxide ◽  
Antibacterial Effect ◽  
Composite Coatings ◽  
Antibacterial Properties ◽  
Antibacterial Effects ◽  
Phosphate Coatings ◽  
Calcium Phosphate Layer ◽  
Copper Phosphate ◽  
Calcium Phosphate Coatings

The antibacterial effects of titanium oxide/calcium phosphate and calcium phos-phate/copper phosphate composite coatings have been investigated. Implant-like rough blasted tita-nium substrates are covered by a native titanium oxide layer. Together with the electrodeposited calcium phosphate layer a clear antibacterial effect has been observed. Electrodeposited calcium phosphate coatings were also dipped in aqueous copper sulphate solutions to convert partly calcium phosphate to copper phosphate. The antibacterial properties of such coatings can be controlled and adjusted to the clinical setting and to specific indications. Patient-tailored antibacterial treatments seem to be possible and may be of special interest for high-risk operations.

scholarly journals Biological nano-functionalization of titanium-based biomaterial surfaces: a flexible toolbox

2009 ◽  
Vol 7 (suppl_1) ◽  
Author(s):  
René Beutner ◽  
Jan Michael ◽  
Bernd Schwenzer ◽  
Dieter Scharnweber
Keyword(s):  
Calcium Phosphate ◽  
Titanium Oxide ◽  
Surface Functionalization ◽  
Bioactive Molecules ◽  
Main Field ◽  
Vast Number ◽  
Anodic Titanium Oxide ◽  
Biomaterial Surfaces

Surface functionalization with bioactive molecules (BAMs) on a nanometre scale is a main field in current biomaterial research. The immobilization of a vast number of substances and molecules, ranging from inorganic calcium phosphate phases up to peptides and proteins, has been investigated throughout recent decades. However, in vitro and in vivo results are heterogeneous. This may be at least partially attributed to the limits of the applied immobilization methods. Therefore, this paper highlights, in the first part, advantages and limits of the currently applied methods for the biological nano-functionalization of titanium-based biomaterial surfaces. The second part describes a new immobilization system recently developed in our groups. It uses the nanomechanical fixation of at least partially single-stranded nucleic acids (NAs) into an anodic titanium oxide layer as an immobilization principle and their hybridization ability for the functionalization of the surface with BAMs conjugated to the respective complementary NA strands.

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