Double Layered HA Coating, its Characterization and Preparation

1998 ◽  
Vol 550 ◽  
Author(s):  
P. Zhou ◽  
S. Asanami ◽  
H. Kawana ◽  
M. Hosonuma ◽  
H. Mitsui ◽  
...  
Keyword(s):  
Coating Layer ◽  
Clinical Applications ◽  
X Ray ◽  
Ha Coating ◽  
Coating Methods ◽  
Surface Contact Area ◽  
Ca Ions ◽  
Good Biocompatibility ◽  
Coating Procedure

AbstractHydroxyapatite (HA) has been universally used because of good biocompatibility. There are varieties of coating methods, however, they still have problems. The most significant problem is layer thickness. We introduced a new coating procedure to eliminate this difficulty.The characterization of the coating was studied by X-ray diffractometry, infrared spectroscopy, SEM and chemical analysis. Said examination indicated that the double layer consisted of carbonate HA and CaTiO3 and the thickness of the layer was 2-4 μm. The coating was performed on the inner surfaces of 50-200 μm sized pores and was also consistent in the smallest of the pores even those of 50 μm. Our results indicated that the coating layer was homogeneous and thin. In addition, both layers consisted of Ca ions. The consistency of coating into even the smallest pore size suggested that our method promises to have widespread clinical applications in artificial implants because of increased surface contact area.

Characterization of Mineral Deposits on Plasma-Sprayed HA-Coated Ti-6Al-4V

1995 ◽  
Vol 414 ◽  
Author(s):  
V. Benezra ◽  
M. Spector ◽  
L. W. Hobbs
Keyword(s):  
Hip Prosthesis ◽  
Femoral Stem ◽  
Mineral Deposits ◽  
Total Hip Prosthesis ◽  
X Ray ◽  
Ha Coating ◽  
Transmission Electron ◽  
Plasma Sprayed ◽  
Surrounding Bone

AbstractPlasma-sprayed hydroxyapatite (PSHA) coatings are often used as the attachment vehicle for the femoral component of a total hip prosthesis. The key to successful hip replacement is the attachment of the femoral stem to the surrounding bone.Within hours of implantation of PSHA-coated Ti-6AI-4V rods in canine bone, bone mineral deposits on the HA coating. These deposits take the form of globular networks of fibrous crystallites. The crystallinity of these deposits was confirmed via high-resolution transmission electron microscopy (TEM) and electron diffraction. We have also characterized the composition of these deposits using x-ray energy-dispersive spectroscopy (XEDS) in the scanning TEM. Finally, we have studied the morphology of the fiber-like crystallites by stereography in the TEM.

Characterization of Cellulose/Calcium Carbonate Biocomposite Film

2016 ◽  
Vol 675-676 ◽  
pp. 209-212 ◽  
Author(s):  
Wichian Siriprom ◽  
Nirun Witit-Anun ◽  
Auttapol Choeysuppaket ◽  
T. Ratana
Keyword(s):  
Calcium Carbonate ◽  
Composite Film ◽  
X Ray Diffraction ◽  
X Ray ◽  
Film Forming ◽  
Ft Ir ◽  
Good Biocompatibility ◽  
Biocomposite Film ◽  
Calcium Carbonate Particle

In this study were to explore the properties of interaction between cellulose and calcium carbonate particle (CaCO3) which derive from Papia Undulates Shell in procedure of biocomposite synthesis. The structural properties of cellulose powder Papia Undulates Shell and cellulose-calcium carbonate composite film were investigated by using X-ray Diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR) and the compositions of cellulose/CaCO3 biocomposite film were studied by Energy Dispersive X-ray Fluorescence (EDXRF). The experimental results demonstrated the morphology of Papia Undulates Shell were crystalline aragonite phase and the cellulose have structural as amorphous-crystalline but after film forming the composite film between cellulose and Papia Undulates Shell also have amorphous structural. The result of FTIR used to confirmed the formation of bonding between molecular, it indicated that the cellulose/CacO3 biocomposite film had good biocompatibility due to the biocomposite film have both characteristic feature of CO3-2 group (~874 cm-1 and ~713 cm-1) and the glucose of cellulose at ~1635, ~1064 and ~946 cm-1. Another that, the result from EDXRF shown the chemical composition of organic compound of cellulose/CaCO3 biocomposite film was highest with 99.437 while the Papia Undulates Shell have 0.341 Wt% with corresponding with the ratio of filler material which mixture as 1%. So that, the cellulose/calcium carbonate bicomposite film could be candidate for biocomposite film application.

Fabrication and Characterization of Bioactive Cancellous-Like Surface on Titanium

2008 ◽  
Vol 368-372 ◽  
pp. 1370-1373
Author(s):  
Yi Ping Tian ◽  
Shan Shan Wei ◽  
Hui Li ◽  
Ling Hong Guo
Keyword(s):  
Rietveld Method ◽  
Sol Gel ◽  
Porous Surface ◽  
Main Attention ◽  
X Ray ◽  
Metal Implants ◽  
Porous Ti ◽  
Particle Coating ◽  
Ha Coating

Bioactive porous surface on metal implants are benefit for forming the continuous interface with “mechanical interlocking” and “chemical bonding” between implants and bones. In the present study, the main attention was concentrated on fabricating a porous bioactive surface on Ti substrate. Porous surface was first fabricated by two-step etched. Then thin HA coating was deposited on the pre-treated porous Ti surface by sol-gel method and immediately sintered at 500°C for 1 hour. The structure and morphology of HA coating formed on the porous surface were characterized by thin-film X-ray diffrac- tion and scanning electronic microscopy, respectively. Rietveld method and Warren-Averbach Fourier Transfer Analysis were employed to determine the lattice parameters, crystallite size and micro-strain of HA coating. The SEM results indicated that an interconnecting porous surface with cancellous structure and mean diameter about 1/m was etched on the Ti substrate, and the surface was covered by a thin particle coating. The TF-XRD results testified that the thin coating was poor crystalline HA.

scholarly journals Electophoretically Deposition of Ti3C2 on Titanium Surface for Hard Tissue Implant Applications

Coatings ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 761
Author(s):  
Jun-Hwee Jang ◽  
Jun-Sung Oh ◽  
Eun-Jung Lee ◽  
Cheol-Min Han
Keyword(s):  
Titanium Surface ◽  
Cell Attachment ◽  
Coating Layer ◽  
Human Mesenchymal Stem Cells ◽  
X Ray Diffraction ◽  
X Ray ◽  
New Class ◽  
Metallic Biomaterial ◽  
Good Biocompatibility

As a metallic biomaterial, titanium (Ti) exhibits excellent biocompatibility, but its osteoinductivity is limited. Therefore, to improve this property, an electrophoretic deposition (EPD) technique was used to coat the Ti surface with Ti3C2 MXene (Ti3C2), a new class of two-dimensional nanomaterial. Ti3C2 is known to have good biocompatibility and better osteoinductivity than graphene oxide. The coating layer was characterized by a particulate microstructure and exhibited X-ray diffraction and Raman spectroscopy peaks corresponding to the Ti3C2 phase. In vitro cell tests using human mesenchymal stem cells confirmed that the cell attachment and proliferation on Ti3C2-coated Ti were similar to that of bare Ti, and that the osteoinductivity was significantly enhanced compared with bare Ti.

Magnetic Film Analysis by RBS, PIXE, HFS and NRA

2002 ◽  
Vol 721 ◽  
Author(s):  
Luncun Wei
Keyword(s):  
Coating Layer ◽  
Layer Structure ◽  
Magnetic Film ◽  
Nuclear Reaction Analysis ◽  
X Ray ◽  
Depth Profiles ◽  
Magnetic Layers ◽  
Nitrogen Contents ◽  
Magnetic Coating

AbstractCharacterization of thin magnetic coating layer is always challenging, different analytical methods are required to characterize layer structure and composition. In the present paper, Rutherford backscattering (RBS)[1], particle induced x-ray emission (PIXE)[2], hydrogen forward scattering (HFS)[3] and nuclear reaction analysis (NRA)[4] are used to measure three typical magnetic film structures and coating layer. Carbon, oxygen, nitrogen contents are measured by deuteron NRA and hydrogen content by HFS. Magnetic layers beneath diamond-like carbon (DLC) layer are characterized by RBS and PIXE: PIXE for relative ratios of Cr, Fe, Co and Ni, and RBS for thickness and depth profiles. The analytical results of one test example shown in this paper demonstrate that the combination of these four methods can give complete and precise layer structure and composition.

A Study of Hydroxyapatite Coating on Porous Ti Compact by Electrostatic Spray Deposition

2007 ◽  
Vol 124-126 ◽  
pp. 1789-1792 ◽  
Author(s):  
W.H. Lee ◽  
Y.H. Kim ◽  
N.H. Oh ◽  
Y.W. Cheon ◽  
Y.J. Cho ◽  
...  
Keyword(s):  
Coating Layer ◽  
Spray Deposition ◽  
Precursor Solution ◽  
Apatite Phase ◽  
X Ray ◽  
Electrostatic Spray Deposition ◽  
Porous Ti ◽  
Ha Coating ◽  
Heat Treated ◽  
Electrostatic Spray

Coatings of hydroxyapatite (HA) on the porous-surfaced Ti compact have been conducted by electrostatic spray deposition (EDS). The precursor solution for the HA coating by ESD was prepared by mixing nano-scaled HA powder with ethyl alcohol. As-deposited HA films on the substrate were heat-treated (400 ~ 900 °C) and their physical characteristics were investigated by Scanning Electronic Microscopy (SEM), X-ray Diffractometer (XRD), and X-ray Photoelectronic Spectroscopy (XPS). As-deposited HA films were consisted of HA particles which were uniformly distributed on the Ti substrate, showing a porous structure. By heat treatment, HA particles were agglomerated each other and melted to form a highly dense and homogeneous coating layer consisted of equiaxed nano-scaled grains. HA coatings on the porous-surfaced Ti compact consisted of highly crystalline apatite phase with the Ca/P ratio of about 1.67 were successfully obtained by using ESD.

SURFACE CHARACTERIZATION OF Ni-Ti ALLOY MODIFIED BY ISOTHERMAL OXIDATION

2006 ◽  
Vol 20 (25n27) ◽  
pp. 3573-3578
Author(s):  
HIROKATSU SUGAWARA ◽  
HIROTAKE GOTO ◽  
JUN KOMOTORI
Keyword(s):  
Corrosion Resistance ◽  
Surface Characterization ◽  
Electrochemical Corrosion ◽  
Isothermal Oxidation ◽  
Protective Oxide ◽  
X Ray ◽  
Ti Alloys ◽  
Good Biocompatibility ◽  
Wear Tests

In order to improve the corrosion resistance of Ni - Ti alloys, mechanically polished Ni - Ti alloys discs were subjected to isothermal oxidation (TO) treatment in N 2-20vol.% O 2 at temperatures ranging from 300 to 800°C. TO-treated surfaces were then analyzed by Field Emission Scanning Electron Microscopy (FE-SEM), Energy Dispersive X-ray spectroscopy (EDX), and X-ray electron spectroscopy (XPS). Electrochemical corrosion tests and wear tests were carried out. Ni - Ti alloys exhibited different oxidation behavior depending on the treatment temperatures. An almost Ni free layer was observed on the surface layer of the specimens treated at temperatures 500°C and above. TO-treated specimens showed a higher corrosion resistance compared to that of the untreated sample, and a higher wear resistance. Consequently, TO-treatment produced an almost nickel free smooth protective oxide layer, which might contribute to good biocompatibility.

MECHANOCHEMICAL SYNTHESIS AND CHARACTERIZATION OF NANOSTRUCTURE FORSTERITE BIOCERAMICS

2008 ◽  
Vol 22 (18n19) ◽  
pp. 3082-3091 ◽  
Author(s):  
M. H. FATHI ◽  
M. KHARAZIHA
Keyword(s):  
Heat Treatment ◽  
Mechanical Activation ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
Mechanochemical Method ◽  
Bone Implant ◽  
X Ray ◽  
Nano Powder ◽  
Good Biocompatibility

Recent investigations suggest that forsterite ceramics possess good biocompatibility and mechanical properties and might be suitable for potential application like bone implant material. In this study, nanocrystalline forsterite ( Mg 2 SiO 4) powder was prepared by mechanochemical method and subsequent heat treatment and the effect of fluorine ion as catalyst was studied. Mechanochemical process and heat treatment were done on the MgCO 3, SiO 2 and ( NH 4)2 SiF 6 powders. The synthesized powders were characterized by X-ray diffraction (XRD), thermogravimetric (TG) analyses and scanning electron microscopy (SEM). The synthesized nano-powder had particle size smaller than 100 nm. The crystallite size of powders after 5 hours mechanical activation was 18 nm. Mechanical activation in the presence of fluorine ion affects the mechanism of forsterite formation and increase the rate of decomposition of MgO and fabrication of forsterite.

The Use of Advanced Analytical Techniques for Characterization of the Chemical, Physical, and Crystallographic Nature of a Surface

1973 ◽  
Vol 31 ◽  
pp. 132-133 ◽  
Author(s):  
R. E. Herfert
Keyword(s):  
Surface Characterization ◽  
Analytical Techniques ◽  
X Ray Diffraction ◽  
Depth Of Penetration ◽  
X Ray ◽  
The Past ◽  
Transmission Electron ◽  
Scanning Electron

Studies of the nature of a surface, either metallic or nonmetallic, in the past, have been limited to the instrumentation available for these measurements. In the past, optical microscopy, replica transmission electron microscopy, electron or X-ray diffraction and optical or X-ray spectroscopy have provided the means of surface characterization. Actually, some of these techniques are not purely surface; the depth of penetration may be a few thousands of an inch. Within the last five years, instrumentation has been made available which now makes it practical for use to study the outer few 100A of layers and characterize it completely from a chemical, physical, and crystallographic standpoint. The scanning electron microscope (SEM) provides a means of viewing the surface of a material in situ to magnifications as high as 250,000X.

High Resolution Replication of Organoclay Surfaces

1982 ◽  
Vol 40 ◽  
pp. 576-577
Author(s):  
W. W. Barker ◽  
W. E. Rigsby ◽  
V. J. Hurst ◽  
W. J. Humphreys
Keyword(s):  
Clay Mineral ◽  
Organic Molecule ◽  
Organic Molecules ◽  
X Ray Diffraction ◽  
Xrd Pattern ◽  
X Ray ◽  
Naturally Occurring ◽  
Silicate Layers ◽  
Mineral Identification

Experimental clay mineral-organic molecule complexes long have been known and some of them have been extensively studied by X-ray diffraction methods. The organic molecules are adsorbed onto the surfaces of the clay minerals, or intercalated between the silicate layers. Natural organo-clays also are widely recognized but generally have not been well characterized. Widely used techniques for clay mineral identification involve treatment of the sample with H2 O2 or other oxidant to destroy any associated organics. This generally simplifies and intensifies the XRD pattern of the clay residue, but helps little with the characterization of the original organoclay. Adequate techniques for the direct observation of synthetic and naturally occurring organoclays are yet to be developed.

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