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

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.

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Hydrothermal Synthesis and Characterization of BiFeO3 Polyhedral Crystallites

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.174-177.508 ◽

2012 ◽

Vol 174-177 ◽

pp. 508-511

Author(s):

Lin Lin Yang ◽

Yong Gang Wang ◽

Yu Jiang Wang ◽

Xiao Feng Wang

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Transmission Electron Microscopy ◽

Synthesis And Characterization ◽

X Ray Diffraction ◽

Xrd Pattern ◽

X Ray ◽

Transmission Electron ◽

Scanning Electron

BiFeO3 polyhedrons had been successfully synthesized via a hydrothermal method. The as-prepared products were characterized by power X-ray diffraction (XRD) pattern, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The possible mechanisms for the formation of BiFeO3 polyhedrons were discussed. Though comparison experiments, it was found that the kind of precursor played a key role on the morphology control of BiFeO3 crystals.

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Morphology Modulated Preparation of PbWO4 Nano- and Macrostructures

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.535-537.392 ◽

2012 ◽

Vol 535-537 ◽

pp. 392-397

Author(s):

Guang Jian Xing ◽

Xiao Xiao Xiong ◽

Dong Mei Peng ◽

Yi Wang ◽

Guang Ming Wu

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Solvothermal Method ◽

X Ray Diffraction ◽

Microwave Irradiation Method ◽

Xrd Pattern ◽

X Ray ◽

Ctab Concentration ◽

Experimental Parameters ◽

Scanning Electron

PbWO4 nano- and macrostructures have been successfully synthesized via solvothermal method and a facile microwave irradiation method. The products were characterized by X-ray diffraction (XRD) pattern and field emission scanning electron microscopy (FESEM). By controlling experimental parameters including the CTAB concentration and the kind of solvent, different morphologies of PbWO4 nano- and macrostructures can be obtained.

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Prepared of Flower-Like CuO via CTAB-Assisted Hydrothermal Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.152-153.909 ◽

2010 ◽

Vol 152-153 ◽

pp. 909-914 ◽

Cited By ~ 1

Author(s):

Yun Ling Zou ◽

Yan Li ◽

Nan Zhang ◽

Jian Gang Li

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Hydrothermal Method ◽

Cetyltrimethylammonium Bromide ◽

Raw Material ◽

Monoclinic Structure ◽

X Ray Diffraction ◽

Xrd Pattern ◽

X Ray ◽

Scanning Electron

Flower-like CuO nanostructures have been prepared via cetyltrimethylammonium bromide (CTAB)-assisted hydrothermal method. Here, CuCl2•2H2O was used as copper raw material, and sodium hydroxide was used as precipitate. The resulting CuO powders were characterized by X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM). X-ray diffraction (XRD) pattern exhibited the nanocrystalline nature with monoclinic structure for the as-synthesized nanostructures. FESEM images indicated that the flower-like CuO nanostructures are composed of many interconnected nanosheets in size of several micrometers in length and width and 60-80 nm in thickness. The possible formation mechanism of flower-like CuO nanostructures was discussed.

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Synthesis of Zinc Doped-Biphasic Calcium Phosphate Nanopowder via Sol-Gel Method

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.531-532.614 ◽

2012 ◽

Vol 531-532 ◽

pp. 614-617 ◽

Cited By ~ 2

Author(s):

Gunawan ◽

I. Sopyan ◽

A. Naqshbandi ◽

S. Ramesh

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Calcium Phosphate ◽

Field Emission ◽

Biphasic Calcium Phosphate ◽

Sol Gel ◽

X Ray Diffraction ◽

X Ray ◽

Gel Technique ◽

Scanning Electron

Biphasic calcium phosphate powders doped with zinc (Zn-doped BCP) were synthesized via sol-gel technique. Different concentrations of Zn have been successfully incorporated into biphasic calcium (BCP) phases namely: 1%, 2%, 3%, 5%, 7%, 10% and 15%. The synthesized powders were calcined at temperatures of 700-900°C. The calcined Zn-doped BCP powders were characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), differential and thermogravimetric analysis (TG/DTA) and field-emission scanning electron microscopy (FESEM). X-ray diffraction analysis revealed that the phases present in Zn-doped are hydroxyapatite, β- TCP and parascholzite. Moreover, FTIR analysis of the synthesized powders depicted that the bands of HPO4 increased meanwhile O-H decreased with an increase in the calcination temperature. Field emission scanning electron microscopy (FESEM) results showed the agglomeration of particles into microscale aggregates with size of the agglomerates tending to increase with an increase in the dopant concentration.

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A Study on Biomineralization Behavior of Silk Fibroin Film

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.336-338.1581 ◽

2007 ◽

Vol 336-338 ◽

pp. 1581-1583

Author(s):

Yong Zhao ◽

Jing Chen ◽

Rong Rong Nie ◽

Xia Deng ◽

Gang He ◽

...

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Calcium Phosphate ◽

Silk Fibroin ◽

X Ray Diffraction ◽

Biomimetic Mineralization ◽

X Ray ◽

Silk Fibroin Film ◽

Phosphate Deposits ◽

Scanning Electron

The aim of the present study is to evaluate the biomineralization behavior of silk fibroin. The biomimetic mineralization was carried out in an alternative calcium/phosphate soaking solution (ACPS). The formation of calcium phosphate deposits was identified by scanning electron microscopy (SEM), energy-dispersive X-ray (EDX), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). A quick formation of well-crystallized apatite on the surface of the silk fibroin film indicates that biomineralization may be an effective approach to obtaining fibroin/HAP composites.

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Synthesis of Titania Nanowires From Local Synthetic Rutiles

Materials Science Forum ◽

10.4028/www.scientific.net/msf.756.31 ◽

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.

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PENGARUH PERBANDINGAN MOLAR Ca/P DALAM PEMBUATAN LAPISAN TIPIS KALSIUM FOSFAT DARI PREKURSOR Ca(NO3)2.4H2O MELALUI METODE SOL-GEL

Jurnal Katalisator ◽

10.22216/jk.v1i2.1741 ◽

2016 ◽

Vol 1 (2) ◽

Author(s):

Veni Dayu Putri

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Fourier Transform ◽

Calcium Phosphate ◽

Sol Gel ◽

Dip Coating ◽

X Ray Diffraction ◽

X Ray ◽

Infra Red ◽

Scanning Electron

ABSTRAK Pembuatan lapisan tipis kalsium fosfat dari kalsium nitrat tetrahidrad (Ca(NO3)2.4H2O) sebagai prekursor kalsium dan asam fosfat (H3PO4) sebagai prekursor fosfat dengan variasi perbandingan mol Ca/P 1.50 , 1.60 , 1.67 , 1.70 dan 1.80 melalui metode sol-gel telah dilakukan. Sol yang didapat dibakar pada suhu 1000oC sehingga terbentuk powder kalsium fosfat berwarna putih. Powder yang didapat dianalisis menggunakan Fourier Transform Infra Red Spectroscopy (FTIR), X-Ray Diffraction (XRD) dan Scanning Electron Microscopy (SEM). Analisis FTIR menunjukkan adanya serapan gugus PO43-, O-H, H2O, CO2, dan P2O74-. Difraksi sinar-X dari powder yang terbentuk memberikan puncak pada sudut 2θ yang berbeda yaitu Calsium Pyrophospate (Ca2P2O7) dan Hydroxyapatite HAP (Ca10(PO4)6(OH)2 pada perbandingan molar Ca/P 1.80 . Analisis SEM menghasilkan Hydroxyapatite dan Calsium Pyrophospate dengan distribusi partikel yang tidak merata dan berbentuk spheric. Proses pelapisan dilakukan pada plat kaca yaitu pada perbandingan mol Ca/P 1.80 menggunakan metode dip-coating dan kemudian dipanaskan pada suhu 400oC. Hasil analisa XRD pada lapisan kalsium fosfat memperlihatkan bahwa senyawa yang terbentuk berbentuk amorf. Sedangkan analisis menggunakan SEM memperlihatkan bahwa lapisan tipis kalsium fosfat memiliki morfologi permukaan yang halus, rapat, homogen dan berbentuk speric. Kata kunci : kalsium fosfat, hydroxyapatite, dip-coating, metode sol-gel ABSTRACT Preparation a thin layer of calcium phosphate using tetrahidrad calcium nitrate (Ca(NO3)2.4H2O) as a precursor of calcium and phosphoric acid (H3PO4) as a precursor of phosphate with a variation of the mole ratio Ca/P 1.50; 1.60, 1.67, 1.70 and 1.80 through the sol-gel method have been done. Sol obtained burned at a temperature of 1000oC to form white powder of calcium phosphate. Powder obtained were analyzed using Fourier Transform Infra Red Spectroscopy (FTIR), X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). FTIR analysis showed absorption PO43- group, O-H, H2O, CO2, and P2O74-. X-ray diffraction from powder formed providing a peak at an angle 2θ different namely Calcium Pyrophospate (Ca2P2O7) and Hydroxyapatite HAP (Ca10(PO4)6(OH)2) at a molar ratio of Ca/P 1.80. Analysis of SEM produces Hydroxyapatite and Calcium Pyrophospate with particle distribution is uneven and shaped spheric. The coating process performed on glass plates with mole ratio of Ca/P 1.80 using a dip-coating and then heated at a temperature of 400oC. XRD analysis on a layer of calcium phosphate showed that the compound formed shaped amorphous. While using SEM analysis showed the morphology of thin layer of calcium phosphate are smooth, dense, homogeneous and shaped speric. Keywords : calcium phosphate, hydroxyapatite, dip-coating, sol-gel method

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Effect of Mineralizers on MnNb2O6 Powder Prepared by Hydrothermal Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.156-157.1010 ◽

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.

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Effect of Electrodeposited Hydroxyapatite Coatings on Biomedical Titanium by Cathode Revolving

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.280-283.1525 ◽

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.

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

Materials Science Forum ◽

10.4028/www.scientific.net/msf.660-661.302 ◽

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).

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