Effect of Electrodeposited Hydroxyapatite Coatings on Biomedical Titanium by Cathode Revolving

2007 ◽  
Vol 280-283 ◽  
pp. 1525-1528
Author(s):  
Xiang Cai Meng ◽  
Xing Yi Li ◽  
Tao Wang
Keyword(s):  
Electron Microscopy ◽  
Heat Treatment ◽  
Scanning Electron Microscopy ◽  
Body Fluid ◽  
X Ray Diffraction ◽  
Bioactive Coatings ◽  
Electro Deposition ◽  
X Ray ◽  
Hydroxyapatite Coatings ◽  
Scanning Electron

The paper deals with a kind of new method of the electro-deposition on titanium by a cathode revolves. The depositing characteristic and mechanic were studied by scanning electron microscopy and X-ray diffraction. The experimental results show that the more fine uniformity and compact calcium phosphate bioactive coatings could be produced, compared with the conventional methods. The gradient Coating, which is fine inside and porous outside, could be obtained by controlling revolving velocity. The coating would transform to the hydroxyapatite after heat-treatment. After soaking in a simulated body fluid (SBF), nano-depositions were formed on the surface of the coating, then those particles would grow up needle-like, net-like, and an apatite-like layer could be observed finally. The gradient porosity coatings produced by cathode revolving electrochemical deposition would have high anti-dissolution and bioactive.

Characterization of Electrophoretically Deposited Chitosan Coatings on Ti13Zr13Nb Alloy for Biomedical Applications

2013 ◽  
Vol 203-204 ◽  
pp. 212-215 ◽  
Author(s):  
Bożena Łosiewicz ◽  
Grzegorz Dercz ◽  
Magdalena Szklarska ◽  
Wojciech Simka ◽  
Marta Łężniak ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solution ◽  
Scanning Electron Microscopy ◽  
Biomedical Applications ◽  
X Ray Diffraction ◽  
Bioactive Coatings ◽  
X Ray ◽  
Scanning Electron ◽  
Deposition Conditions

The chitosan (CH) coatings on a Ti13Zr13Nb alloy substrate were obtained by electrophoretic deposition (EPD). The EPD yield was investigated under different deposition conditions. The microstructure of the CH coatings obtained by cataphoresis was studied by scanning electron microscopy and the chemical composition was examined using EDAX. The functional groups and formed phases were analyzed using Fourier transform infrared spectroscopy and X-ray diffraction, respectively. It was found that the CH coating thickness and porosity can be controlled by time and voltage used for the EPD process. It was ascertained that the studied EPD of the natural biopolymer, chitosan, in aqueous solution is applicable for the surface modification of the Ti13Zr13Nb implants to develop novel bioactive coatings.

Synthesis of Titania Nanowires From Local Synthetic Rutiles

2013 ◽  
Vol 756 ◽  
pp. 31-36
Author(s):  
Muslimin Masliana ◽  
Meor Sulaiman Meor Yusoff ◽  
S.P. Wilfred
Keyword(s):  
Electron Microscopy ◽  
Heat Treatment ◽  
Scanning Electron Microscopy ◽  
Crystalline Phase ◽  
Sodium Titanate ◽  
Energy Dispersive ◽  
X Ray Diffraction ◽  
X Ray ◽  
1D Nanostructures ◽  
Scanning Electron

A new method for preparation of titania nanowires with diameter around 20 nmand length up more than 4um is described. The precursor was supply from local amang plant in Lahat, Perak which is produced the by product called synthetic rutiles. This precursor was mix with NaOH to form sodium titanate followed by heating at temperature of 550°C for 3 h. The sodium titanate formed by this way aggregated into 1D nanostructures and was subsequently transformed into titania nanowires during the heat treatment. The crystalline phase of the titania nanowires is rutile. The precursor as well as titania based samples were characterized by X-ray diffraction, Energy dispersive X-ray and scanning electron microscopy.

Hydroxyapatite Coating on Ti-6Al-4V Alloy by an Electrolytic Process and with Heat-Treatment

2009 ◽  
Vol 631-632 ◽  
pp. 407-412
Author(s):  
Cheng Li Wang ◽  
Wei Jen Shih ◽  
Szu Hao Wang ◽  
Kuo Ming Chang ◽  
Wang Long Li ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Heat Treatment ◽  
Scanning Electron Microscopy ◽  
Calcium Phosphate ◽  
X Ray Diffraction ◽  
Xrd Pattern ◽  
Major Phase ◽  
X Ray ◽  
Electrolytic Process ◽  
Scanning Electron

The effect of the heat-treatment on the calcium phosphate deposited on Ti-6Al-4V substrate by an electrolytic process has been investigated. The calcium phosphate were deposited in a 0.04M Ca(H2PO4)2･H2O (MCPM) solution on Ti-6Al-4V substrate at 60 °C, 10V and 80 Torr for 1h, and calcined at different temperature for 4h. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to characterized the deposited samples. The XRD pattern of as-deposited sample contain the phase of dicalcium phosphate (DCPD) and HAP. When calcined at 400 °C for 4 h, the DCPD phase is vanished and HAP becomes the major phase. The XRD pattern reveals that the intensity of HAP and Ca2P2O7 (CPP) decreases, but the β-TCP, CaO and rutile TiO2 also shows up.

Effect of Mineralizers on MnNb2O6 Powder Prepared by Hydrothermal Method

2010 ◽  
Vol 156-157 ◽  
pp. 1010-1013
Author(s):  
Yong Ping Pu ◽  
Yong Yong Zhuang ◽  
Kai Chen ◽  
Ning Xu
Keyword(s):  
Electron Microscopy ◽  
Heat Treatment ◽  
Scanning Electron Microscopy ◽  
Particle Size ◽  
Phase Composition ◽  
Hydrothermal Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Highly Dispersed ◽  
Scanning Electron

Pure MnNb2O6 powders was successfully prepared by hydrothermal method using Nb2O5•nH2O and Mn(NO3)2 as precursors and HCl, HF, NaOH, NH4OH solutions as mineralization agent. The phase composition and morphology of the prepared powder were characterized by X-ray diffraction and scanning electron microscopy. The effect of mineralizers on phase formation was investigated. The results show that the MnNb2O6 powders with crystallite size of ~24nm can be obtained with Mn(NO3)2 and Nb2O5•nH2O as precursors in neutral and alkaline solution at 200 for 168h. The particle size of the MnNb2O6 powder was ~300nm after heat treatment at a temperature of 600 . The SEM photographs show that the morphology of the MnNb2O6 powder are rod-like particles and the MnNb2O6 powders are highly dispersed.

scholarly journals Bioactive Ceramics Based on Nb2O5 and Ta2O5

2008 ◽  
Vol 396-398 ◽  
pp. 641-644 ◽  
Author(s):  
C. Marques ◽  
Luis Henrique Leme Louro ◽  
Marcelo Henrique Prado da Silva
Keyword(s):  
Electron Microscopy ◽  
Tissue Engineering ◽  
Scanning Electron Microscopy ◽  
Body Fluid ◽  
X Ray Diffraction ◽  
X Ray ◽  
Bioactive Ceramics ◽  
Metallic Implants ◽  
Bioinert Ceramics ◽  
Scanning Electron

Bioactive ceramics have the ability to chemically bond to bone. This class of biomaterials can be used as coatings on metallic implants, alloplastic bone defect fillers and as scaffold for tissue engineering. The most widely used bioactive ceramics are hydroxyapatite, Ca10(PO4)6(OH)2 and tricalcium phosphate, Ca3(PO4)2. This study presents new bioactive ceramics based on Nb2O5 and Ta2O5. These materials were produced from bioinert ceramics chemically activated by an alkali hydrothermal treatment. Scanning electron microscopy, energy dispersion X-ray spectroscopy and X-ray diffraction analyses on samples incubated in simulated body fluid showed the presence of bone-like apatite, confirming that the modified ceramics surface became bioactive.

Effect of Variables the HDDR Processing on Magnetic Properties and Microstructure in Permanent Magnets Based on Pr-Fe-B

2010 ◽  
Vol 660-661 ◽  
pp. 302-307
Author(s):  
P.B. Santos ◽  
S.C. Silva ◽  
Rubens Nunes de Faria Jr. ◽  
Hidetoshi Takiishi
Keyword(s):  
Electron Microscopy ◽  
Heat Treatment ◽  
Scanning Electron Microscopy ◽  
Magnetic Properties ◽  
Permanent Magnets ◽  
X Ray Diffraction ◽  
Crystalline Phases ◽  
X Ray ◽  
Scanning Electron

The first goal of this work involved the study of the effect of variables the HDDR processing, such as: the added pressure of H2 in the system, the time of heat treatment and recombination of Pr12Fe65.9Co16B6Nb0.1 alloy with the aim of improving the magnetic properties like the magnetic properties of the Pr14Fe63.9Co16B6Nb0.1 alloy (Br= 865mT and iHc= 790mT). The second aim of the work involved the characterization of HDDR powders that were analyzed by X-ray diffraction for identification and quantification of crystalline phases. These materials were analyzed by scanning electron microscopy (SEM).

Fabrication of Functionally Gradient Ultrafine-Grained WC-Co Composites

2013 ◽  
Vol 423-426 ◽  
pp. 885-889 ◽  
Author(s):  
Yi Gao Yuan ◽  
Jian Jun Ding ◽  
Yan Kun Wang ◽  
Wei Quan Sun
Keyword(s):  
Electron Microscopy ◽  
Heat Treatment ◽  
Scanning Electron Microscopy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Grain Sizes ◽  
Functionally Gradient ◽  
Ultrafine Grained ◽  
Before And After ◽  
Scanning Electron

The carburizing heat treatments of ultrafine-grained WC-Co composites with sub-stoichiometric carbon content were carried out, and the microstructures of ultrafine-grained WC-Co carbides before and after treated were characterized by means of scanning electron microscopy and X-ray diffraction. The results show that the functionally gradient ultrafine-grained WC-Co hardmetals with a Co depleted surface and not comprising the η-phase can be fabricated by carburizing heat treatment. After heat treatment, WC grain sizes in materials are still at the ultrafine grade.

Synthesis of Nanotubular Titanate from Titanium Using Hydrothermal Treatment

2006 ◽  
Vol 317-318 ◽  
pp. 247-250 ◽  
Author(s):  
T. Kubo ◽  
W. Kato ◽  
Yuki Yamasaki ◽  
Atsushi Nakahira
Keyword(s):  
Electron Microscopy ◽  
Heat Treatment ◽  
Aqueous Solution ◽  
Scanning Electron Microscopy ◽  
Hydrothermal Treatment ◽  
X Ray Diffraction ◽  
X Ray ◽  
Synthesis Conditions ◽  
Transmission Electron ◽  
Scanning Electron

In this study, the synthesis of nanotubular titanate was attempted though heat-treatment in an oil bath (non-hydrothermal treatment), heat-treatment with stirring in an oil bath (non-hydrothermal treatment), or hydrothermal treatment for metal Ti in NaOH aqueous solution systems. Obtained products were characterized by various methods, such as X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). XRD results suggested that products obtained by both hydrothermal treatment and heat-treatment in an oil bath with and without stirring could be identified as H2Ti4O9H2O. From TEM observations, however, various morphologies for products obtained by these treatments were confirmed. Therefore, it was considered that morphologies of these products strongly depended on synthesis conditions.

Microstructure and Texture Evolution of Cu–Nb Nano-Composite Wire during Heat-Treatment

2014 ◽  
Vol 788 ◽  
pp. 668-673 ◽  
Author(s):  
Ze Yuan Sun ◽  
Xiao Fang Yang ◽  
Li Ping Deng ◽  
Qing Liu
Keyword(s):  
Electron Microscopy ◽  
Heat Treatment ◽  
Scanning Electron Microscopy ◽  
Texture Evolution ◽  
Fiber Texture ◽  
Composite Wire ◽  
X Ray Diffraction ◽  
Nano Composite ◽  
X Ray ◽  
Scanning Electron

In this study, the microstructure and texture evolution of Cu-Nb nanocomposite wirescontaining 854Nb fibers after heat treatment were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The resultsare shown as follows:(1)Nb had the phenomenon of edge spheroidization and thermal gullies after annealing at 400oC. While the Nbfilaments were broken,showing edge spheroidization andcylinderization, and formed discontinuous bamboo-like structureafter annealing at 700oC for 1h, and the phenomenon of bamboo-like structure, spheroidization andcylinderizationafter annealing at 700oC for 2hwas moreseriousthan thatfor1h. (2) Several texture components appeared in the Cu matrix before heat treatment, however, <111>fiber texture component dominated after annealing at 400oC and 700oC. The textures of Nb filamentsseldomchanged during heat-treatment, exhibitinga major<110>fiber texture.

Identification of calcium oxalate crystals in dried or fixed tobacco leaf

1984 ◽  
Vol 42 ◽  
pp. 288-289
Author(s):  
Vicki L. Baliga ◽  
Mary Ellen Counts
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Calcium Oxalate ◽  
Growth And Development ◽  
Polarized Light ◽  
Calcium Oxalate Crystals ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Scanning Electron

Calcium is an important element in the growth and development of plants and one form of calcium is calcium oxalate. Calcium oxalate has been found in leaf seed, stem material plant tissue culture, fungi and lichen using one or more of the following methods—polarized light microscopy (PLM), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and x-ray diffraction.Two methods are presented here for qualitatively estimating calcium oxalate in dried or fixed tobacco (Nicotiana) leaf from different stalk positions using PLM. SEM, coupled with energy dispersive x-ray spectrometry (EDS), and powder x-ray diffraction were used to verify that the crystals observed in the dried leaf with PLM were calcium oxalate.

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