Fabrication of Bioactive Glass with Titanium Ion Doping via Various Reactive Environments

2019 ◽  
Vol 801 ◽  
pp. 21-26
Author(s):  
Wei Fang ◽  
Bo Rui Huang ◽  
Tzu Hao Liu ◽  
Jhih An Chen ◽  
Ching Fen Chang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Chemical Composition ◽  
Bioactive Glass ◽  
Sol Gel ◽  
Energy Dispersive ◽  
Gel Method ◽  
X Ray ◽  
Ion Doping ◽  
Scanning Electron

Bioactive glass has high biocompatibility and bioactivity. With specific ion adding, it can show different advantages. Titanium ion can improve the mechanic strength, antibacterial ability of bioactive glass, and stability. In this study, bioactive glass with titanium ion doping by the sol-gel method via various reactive environments was fabricated successfully. The morphology was observed by scanning electron microscopy (SEM). The chemical composition was measured by energy dispersive X-ray spectrometer (EDS). By soaking in SBF, the bioactivity of samples had also been analyzed. The formula of bioglass has been optimized to make the better bioactivity.

scholarly journals Joining of γ-TiAl Alloy to Ni-Based Superalloy Using Ag-Cu Sputtered Coated Ti Brazing Filler Foil

Metals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 723 ◽  
Author(s):  
Sónia Simões ◽  
Carlos Tavares ◽  
Aníbal Guedes
Keyword(s):  
Electron Microscopy ◽  
Solid Solution ◽  
Scanning Electron Microscopy ◽  
Chemical Composition ◽  
Tial Alloy ◽  
Energy Dispersive ◽  
X Ray ◽  
Base Materials ◽  
Intermetallic Particles ◽  
Scanning Electron

Joining γ-TiAl alloy to Ni-based superalloy Hastelloy using Ag-Cu sputtered coated Ti foil as brazing filler was investigated in this study. Brazing experiments were performed at 900, 950, and 980 °C with a dwelling stage of 10 min in vacuum. The microstructure and the chemical composition of the resulting interfaces were analyzed by scanning electron microscopy (SEM) and by energy dispersive X-ray spectroscopy (EDS), respectively. Sound joints were produced after brazing at 980 °C, presenting a multilayered interface, consisting mainly of Ti-Al and Ti-Ni-Al intermetallics close to the γ-TiAl alloy, and of Ti-rich, Ti-Ni, and Cr-Ni-Mo rich phases near Hastelloy. The hardness of the interface, ranging from around 300 to 1100 HV0.01, is higher than both base materials, but no segregation of either Ag solid solution or coarse intermetallic particles was observed. Therefore, the developed brazing filler also avoids the need to perform post-brazing heat treatments that aim to eliminate detrimental extensive segregation of either soft phases or of hard and brittle compounds.

scholarly journals Relationship Between the Surface Chemical Composition of Implants and Contact With the Substrate

2015 ◽  
Vol 41 (1) ◽  
pp. 17-21 ◽  
Author(s):  
Mariana Lima da Costa Valente ◽  
Antonio Carlos Shimano ◽  
Elcio Marcantonio Junior ◽  
Andréa Candido dos Reis
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Chemical Composition ◽  
Surface Characterization ◽  
Structural Changes ◽  
Testing Machine ◽  
Energy Dispersive ◽  
Machined Surface ◽  
X Ray ◽  
Scanning Electron

The purpose of the study was to use scanning electron microscopy and energy dispersive x-ray spectrometry to assess possible morphologic and chemical changes after performing double-insertion and pullout tests of implants of different shapes and surface treatments. Four different types of implants were used—cylindrical machined-surface implants, cylindrical double-surface–treated porous implants, cylindrical surface-treated porous implants, and tapered surface-treated porous implants—representing a total of 32 screws. The implants were inserted into synthetic bone femurs, totaling 8 samples, before performing each insertion with standardized torque. After each pullout the implants were analyzed by scanning electron microscopy and energy dispersive x-ray spectrometry using a universal testing machine and magnified 35 times. No structural changes were detected on morphological surface characterization, only substrate accumulation. As for composition, there were concentration differences in the titanium, oxygen, and carbon elements. Implants with surface acid treatment undergo greater superficial changes in chemical composition than machined implants, that is, the greater the contact area of the implant with the substrate, the greater the oxide layer change. In addition, prior manipulation can alter the chemical composition of implants, typically to a greater degree in surface-treated implants.

scholarly journals Nanocomposites Produced by Growth of Hydroxyapatite onto Silica Particles Prepared by the Sol-Gel Method

1996 ◽  
Vol 5 (1) ◽  
pp. 096369359600500 ◽  
Author(s):  
R. Rodríguez ◽  
J. Coreño ◽  
J.A. Arenas ◽  
V.M. Castaño
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Sol Gel ◽  
Silica Particles ◽  
X Ray Diffraction ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Silica Sols ◽  
Scanning Electron

The growth of hydroxyapatite, a calcium phosphate, on silica particles prepared by the sol-gel method is reported. The size of the silica sols was controlled by changing the pH of water before the mixing with the alcoxide. Particle size profiles of sols were obtained by using dynamical light scattering. The characterisation of the composites, of nanometer sizes, was performed by employing X-ray diffraction, scanning electron microscopy and Raman spectroscopy.

scholarly journals ANALYSES OF WASTE PRODUCTS OBTAINED BY LASER CUTTING OF AW-3103 ALUMINIUM ALLOY

2020 ◽  
Vol 60 (6) ◽  
Author(s):  
Jan Loskot ◽  
Maciej Zubko ◽  
Zbigniew Janikowski
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Chemical Composition ◽  
Aluminium Alloy ◽  
Energy Dispersive ◽  
Pure Aluminium ◽  
X Ray ◽  
Transmission Electron ◽  
Scanning Electron

In the presented research, the methods of scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction and transmission electron microscopy were applied to analyse the powder waste obtained by cutting of AW-3103 aluminium alloy using a fibre laser. The scanning electron microscopy allows to analyse the morphology of the waste microparticles, the energy-dispersive X-ray spectroscopy revealed their chemical composition, which was compared with the composition of the original cut material. In the waste powder, mainly plate-like particles were observed that contain almost pure aluminium. X-ray powder diffraction measurements confirmed that the waste powder is composed of aluminium phase with only a slight presence of other phases (magnetite, austenite and graphite) and the transmission electron microscopy revealed the presence of nanoscale particles in this waste powder. Furthermore, it was found that the average size of the microparticles depends on the thickness of the cut material: particles obtained from a thicker workpiece were substantially bigger than those obtained from the thinner material. On the contrary, the dimensions of the workpiece have only a little impact on the particles’ shape and no significant influence on their chemical composition. The results also suggest that the microparticles could be used as an input material for powder metallurgy. But there is also a certain health risk connected with inhalation of such tiny particles, especially the nanoparticles, which can penetrate deep into the human pulmonary system.

Plasma Electrolytic Carbonitriding of 20CrMnTi Steel

2010 ◽  
Vol 154-155 ◽  
pp. 1393-1396 ◽  
Author(s):  
Xin Min Fan ◽  
Jie Wen Huang ◽  
Qun Yang ◽  
Jun Jie Gan
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Chemical Composition ◽  
Phase Structure ◽  
Energy Dispersive ◽  
X Ray Diffraction ◽  
X Ray ◽  
Plasma Electrolytic ◽  
Scanning Electron ◽  
Microhardness Tester

A carbontirided layer was produced on 20CrMnTi steel by plasma electrolytic carbonitriding (PEC/N). Scanning electron microscopy with an energy dispersive X-ray analysis was employed to study the morphology and chemical composition of the carbonitrided layer. Hardness of the layer was measured using a microhardness tester, and the phase structure was determined by X-ray diffraction. The results show that a compact carbonitrided layer can be obtained on the surface of 20CrMnTi steel. The thickness of the layer increases with carbontriding time. When the sample was treated at 120V for 20min, the thickness is 45μm and the highest microhardness is 766HV0.05. The carbontrided layers are composed of Fe3C, Fe5C2, ε-Fe3N and α-Fe.

scholarly journals Texture and chemical composition analyses on the Hg0.66Pb0.33Ba2Ca2Cu3Oy superconductor using the sealed quartz tube technique

1996 ◽  
Vol 11 (6) ◽  
pp. 1367-1372 ◽  
Author(s):  
J.C.L. Chow ◽  
P.C.W. Fung ◽  
H.M. Shao ◽  
C.C. Lam
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Chemical Composition ◽  
Energy Dispersive ◽  
Quartz Tube ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Scanning Electron

Pb-substituted Hg-based superconductor of Hg0.66Pb0.33Ba2Ca2Cu3Oy has been fabricated using the sealed quartz tube technique. R- and x-ray diffraction pattern (XDP) measurements show that the specimen has a Tc of 135 K and contains mainly the Hg-1223 phase. Scanning electron microscopy/energy dispersive x-ray analysis (SEM/EDX) and transmission electron microscopy/energy dispersive x-ray analysis (TEM/EDX) were employed to study the texture and chemical composition of the specimen. It is found that the specimen contains round-shaped grains with a mixture of Hg-1223, BaCuO2, and Ca0.85CuO2 phases, square-shaped grains with a formula of PbBa2O3, small single crystals with single Hg-1223 phase, and crystal-like layers with a mixture of Hg-1223 and BaCuO2 phase. We consider that though the doping of Pb can benefit the stabilization of the Hg-1223 phase, it introduces other impurity phases and textures in the specimen at the same time.

Remineralization of Demineralized Enamel by Toothpastes: A Scanning Electron Microscopy, Energy Dispersive X-Ray Analysis, and Three-Dimensional Stereo-Micrographic Study

2013 ◽  
Vol 19 (3) ◽  
pp. 587-595 ◽  
Author(s):  
Elizabeta S. Gjorgievska ◽  
John W. Nicholson ◽  
Ian J. Slipper ◽  
Marija M. Stevanovic
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Bioactive Glass ◽  
Protective Layer ◽  
Energy Dispersive ◽  
X Ray ◽  
Dental Tissues ◽  
Demineralized Enamel ◽  
Strontium Acetate ◽  
Scanning Electron

AbstractRemineralization of hard dental tissues is thought to be a tool that could close the gap between prevention and surgical procedures in clinical dentistry. The purpose of this study was to examine the remineralizing potential of different toothpaste formulations: toothpastes containing bioactive glass, hydroxyapatite, or strontium acetate with fluoride, when applied to demineralized enamel. Results obtained by scanning electron microscopy (SEM) and SEM/energy dispersive X-ray analyses proved that the hydroxyapatite and bioactive glass-containing toothpastes were highly efficient in promoting enamel remineralization by formation of deposits and a protective layer on the surface of the demineralized enamel, whereas the toothpaste containing 8% strontium acetate and 1040 ppm fluoride as NaF had little, if any, remineralization potential. In conclusion, the treatment of demineralized teeth with toothpastes containing hydroxyapatite or bioactive glass resulted in repair of the damaged tissue.

scholarly journals Fractured Metallic Tracheostomy Tube: Report of a Fractographic Study

2021 ◽  
Author(s):  
Monthira Tanthanuch ◽  
Surasak Sangkhathat ◽  
Wandee Khaimook ◽  
Sawit Tanthanuch
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Stainless Steel ◽  
Chemical Composition ◽  
Tracheostomy Tube ◽  
Energy Dispersive ◽  
Composition Analysis ◽  
X Ray ◽  
Surface Visualization ◽  
Scanning Electron

Objective: To investigate the cause of a broken metallic tracheostomy tube.Material and Methods: In this study, we performed a fractographic investigation of a broken tracheostomy tube from an elderly patient using surface visualization, scanning electron microscopy, energy dispersive X-ray spectroscopy, and chemical composition analysis using X-ray fluorescent and metallographic testing.Results: Surface visualization revealed multiple corrosive pits which were confirmed by liquid penetrant testing. Scanning electron microscopy and energy dispersive X-ray spectroscopy revealed the chemical composition of the tube to be an austenitic chromium-nickel-manganese stainless steel alloy. Metallographic analysis suggested that the fracture site originated from the inner surface from intergranular corrosion.Conclusion: The evidence suggests that the corrosion resistance properties of this material might not be suitable for long term use in the human trachea. Higher grade stainless steel or more frequent device change is recommended.

Phase Investigations of Copper Based CuZn38Al2MnFe Alloy

2006 ◽  
Vol 113 ◽  
pp. 537-540
Author(s):  
Marek Szkodo ◽  
M. Głowacka ◽  
M. Smajdor ◽  
Henryk Bugłacki
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Image Analysis ◽  
Chemical Composition ◽  
Light Microscopy ◽  
Volume Fraction ◽  
Energy Dispersive ◽  
Phase Identification ◽  
X Ray ◽  
Scanning Electron

In the work phase investigations of special brass CuZn38Al2MnFe alloy are presented. The microstructure, chemical composition and phase identification of the investigated alloy were examined using scanning electron microscopy (Philips 30/ESEM), light microscopy Leica coupled with PC computer with installed MultiScan program, energy dispersive X-ray spectroscopy (EDX) and X-ray diffractometry (XRD), respectively. The investigation of volume fraction existing phases was carried out using image analysis. It was found in the test bend that presence of Fe4Mn77Si19 phase in microstructure caused an increase of brittleness of the tested alloy.

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