scholarly journals Measurement of aluminum oxide film by Fabry–Pérot interferometry and scanning electron microscopy

2017 ◽  
Vol 21 (8) ◽  
pp. 938-942
Author(s):  
Farzia Karim ◽  
Tanujjal Bora ◽  
Mayur Chaudhari ◽  
Khaled Habib ◽  
Waleed Mohammed ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Oxide Film ◽  
Aluminum Oxide ◽  
Aluminum Oxide Film ◽  
Fabry Perot ◽  
Scanning Electron

Charge dynamics in aluminum oxide thin film studied by ultrafast scanning electron microscopy

2018 ◽  
Vol 187 ◽  
pp. 93-97 ◽  
Author(s):  
Maurizio Zani ◽  
Vittorio Sala ◽  
Gabriele Irde ◽  
Silvia Maria Pietralunga ◽  
Cristian Manzoni ◽  
...  
Keyword(s):  
Thin Film ◽  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Aluminum Oxide ◽  
Oxide Thin Film ◽  
Charge Dynamics ◽  
Scanning Electron

Analysis of the Y-TZP Ceramic Substucture in Blasting with Aluminum Oxide before and after Sintering

2014 ◽  
Vol 805 ◽  
pp. 576-580
Author(s):  
C.L. Melo-Silva ◽  
C.F. Carvalho ◽  
T.C.F. Melo-Silva ◽  
R.X. Freitas ◽  
F.R.F. Silva ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Aluminum Oxide ◽  
Good Alternative ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Resin Cements ◽  
Before And After ◽  
Scanning Electron ◽  
Group 1

The objective of this study was to evaluate the microstructure of a ceramic based on yttria stabilized zirconia (Y-TZP) in blasting with aluminum oxide and its effect on the sintering. 25 pre-sintered Y-TZP blocks were obtained. Ten samples were blasted with alumina, and then all samples were sintered and divided into the groups: Control-no treatment; alumina G1-blasted with alumina and sintered; alumina and Rocatec G1-blasted, sintered, and Rocatec; alumina G2-sintered, alumina blasting; alumina and Rocatec G2-sintering, alumina blasting, and Rocatec. The samples were evaluated by a scanning electron microscopy. The qualitative analysis showed that the treated samples had an increase in the surface texture and that group 1– alumina and Rocatec– presented the silica incorporation to be regular and homogeneous. It was concluded that the treatment of pre-sintered surfaces is a good alternative in the bonding strength between the Y-TZP and the resin cements.

Resistance Values of Aluminum Oxide Film in Situ during Anodization of Aluminum by Fabry-Pérot Interferometry

2017 ◽  
Vol 80 (10) ◽  
pp. 1221-1229
Author(s):  
Khaled Habib ◽  
Waleed Mohammad ◽  
Farzia Karim ◽  
Joydeep Dutta
Keyword(s):  
Oxide Film ◽  
Aluminum Oxide ◽  
Aluminum Oxide Film ◽  
Fabry Perot

Effects of Aluminum Oxide on Combustion Behavior of Intumescent Fire-Retarded Polypropylene Composites

2011 ◽  
Vol 120 ◽  
pp. 598-602
Author(s):  
Shan Hu ◽  
Hui Jing ◽  
Jun Zhang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Aluminum Oxide ◽  
Oxygen Index ◽  
Al2o3 Content ◽  
Reaction Products ◽  
Limiting Oxygen Index ◽  
Polypropylene Composites ◽  
Melamine Phosphate ◽  
Scanning Electron

The melamine phosphate (MP) was synthesized from melamine and phosphate acid. Aluminum oxide (Al2O3) was added into the MP during its synthesis. Fourier transform infrared spectroscopy (FTIR) was used to characterize the reaction products. The composites were prepared from polypropylene (PP) and intumescent flame retardant (IFR) additives of MP and pentaerythritol (PER). The effect of Al2O3 content on the properties of the composites was investigated by the limiting oxygen index (LOI), thermogravimetry (TG) and scanning electron microscopy (SEM). The results indicated that the LOI value of the composites could be enhanced obviously with suitable content of Al2O3. When the Al2O3 content was 6 wt% in MP, the LOI value increased to 35.5% from 31.0% for the composite without Al2O3, the amount of residual char at 600°C increased from 8.9 wt% to 13.9 wt%.

scholarly journals Study on the Phase Equilibria of the Fe-Al-Ni-O System at 750°C

Scanning ◽  
2022 ◽  
Vol 2022 ◽  
pp. 1-12
Author(s):  
Meng Du ◽  
Haifeng Mei ◽  
Ya Liu
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Phase Equilibrium ◽  
Oxide Film ◽  
Phase Equilibria ◽  
Phase Boundary ◽  
Alloy Composition ◽  
X Ray ◽  
Three Phase ◽  
Scanning Electron

Phase equilibria of the Fe-Al-Ni-O system at 750°C were determined by scanning electron microscopy coupled with energy-dispersive X-ray spectrometer and X-ray power diffraction. 54 alloys were prepared with weighted metal and Ni2O3 powder and were annealed at 750°C for 45 days. Two four-phase equilibrium regions and three three-phase equilibrium regions were confirmed, and the boundary between spinel and corundum was obtained. Comparing with the Fe-Al-Ni-O oxidation diagram at 750°C calculated with FSstel and FToxid databases, the phase boundary of the spinel and corundum oxides from experiments was inclined to the Ni-Al side. The determined relationship between primary oxides and alloy composition in this work can be used as a reference for the preparation of the oxide film by selective oxidation.

scholarly journals The Development of Nanoalumina-Based Cement Mortars for Overlay Applications in Concrete Floors

Materials ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 3465 ◽  
Author(s):  
Szymanowski ◽  
Sadowski
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Tensile Strength ◽  
Aluminum Oxide ◽  
Functional Properties ◽  
Abrasion Resistance ◽  
Cement Mortar ◽  
Cement Mortars ◽  
Positive Effect ◽  
Scanning Electron

This article focuses on the development of nanoalumina-based cement mortars for overlay applications in concrete floors. It focuses on the effect of applying aluminum oxide (Al2O3) nanopowder to the cement mortar used to make the overlay, on the adhesion of this overlay to concrete substrate and on its functional properties. It was claimed that the addition of 0.5% of Al2O3 nanopowder has a positive effect on the adhesion of the cement mortar used to make the overlay to the substrate made of concrete. The prior studies performed using scanning electron microscopy (SEM) confirmed that the reason for the improvement in adhesion is the fact that cement mortar used to make the overlay with the addition of 0.5% of Al2O3 nanopowder is less porous than the reference mortar within the interphase. The article concurs that the most favorable results, in terms of lower abrasion resistance and higher subsurface tensile strength of the cement mortar used to make the overlay, are mainly brought about by adding 0.5% of Al2O3 nanopowder.

A Facile Method for Improving the Process of Porous Anodic Aluminum Oxide Film Preparation

2014 ◽  
Vol 809-810 ◽  
pp. 627-630
Author(s):  
Kai Feng Zhang ◽  
Hui Zhou ◽  
Hu Lin Li ◽  
Rui Peng Sang ◽  
Zhi Hua Wan ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Aluminum Oxide ◽  
Anodic Aluminum Oxide ◽  
Anodic Aluminum Oxide Film ◽  
Anodic Aluminum ◽  
One Step ◽  
Pore Opening ◽  
Film Preparation ◽  
Scanning Electron

A new and facile method for improving the procedure of anodic aluminum oxide (AAO) film preparation was presented, which was based on an electrochemical detachment procedure. The detachment and pore-opening were performed just through one step in a solution of HClO4and C2H5OH at a voltage of 40V. The as-obtained AAO film was characterized by scanning electron microscopy (SEM) and scanning probing microscopy (SPM). The process of detachment and pore-opening was also discussed.

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