scholarly journals The Influence of Sample Preparation Techniques on Aluminium Alloy AA2024-T3 Substrates for Sol-Gel Coating

2021 ◽  
Vol 11 (1) ◽  
pp. 5
Author(s):  
Magdi H. Mussa ◽  
Nicholas Farmilo ◽  
Oliver Lewis
Keyword(s):  
Sample Preparation ◽  
Aluminium Alloy ◽  
Preparation Method ◽  
Sol Gel ◽  
Metal Alloys ◽  
Surface Roughening ◽  
Surface Protection ◽  
Film Coatings ◽  
Thin Film Coatings ◽  
Preparation Techniques

Sol-gel coatings provide environmentally friendly surface protection for metals and can replace toxic pre-treatments such as those based on hexavalent chromium on metal alloys. This project ultimately aims to develop silica-based organic–inorganic sol-gel derived thin film coatings possessing anti-corrosion and anti-fouling properties on aluminium alloy substrates. As with any coating, sample preparation plays a significant role in the performance of a sol-gel coating. Therefore, it was necessary to define a preparation method that combines the removal of contaminants and surface roughening to improve adhesion and reproducibility. Four techniques were investigated: fine abrasive sandpaper cleaning, acetone degreasing only and cleaning with an industrial-available alkaline cleaner for 5 min and 30 min.

Glasses and Multi-Component Sol-Gels for Use as High-Temperature Protective Coatings

1990 ◽  
Vol 180 ◽  
Author(s):  
Lauri J. Devore ◽  
Nora R. Osborne
Keyword(s):  
Thin Film ◽  
High Temperature ◽  
Ambient Temperature ◽  
Titanium Aluminide ◽  
Protective Coatings ◽  
Sol Gel ◽  
Film Coatings ◽  
Interfacial Conditions ◽  
Thin Film Coatings

ABSTRACTTwo multi-component sol-gel compositions were developed and compared to several commercially available high-temperature glasses. All were then used and characterized as protective coatings for intermetallic titanium aluminide.The sol-gels were studied as thin film coatings and the commercial glasses were studied as enameled coatings. Attention was given to (1) the effect of the application temperature on the original microstructure of the metal, and (2) the role of interfacial conditions between the glass and metal in cyclic and isothermal thermal cycles between ambient temperature and 760°C (1400°F).

scholarly journals Investigation of the post-annealing electromagnetic response of Cu–Co oxide coatings via optical measurement and computational modelling

RSC Advances ◽  
2017 ◽  
Vol 7 (27) ◽  
pp. 16826-16835 ◽  
Author(s):  
M. Mahbubur Rahman ◽  
Hussein A. Miran ◽  
Zhong-Tao Jiang ◽  
Mohmmednoor Altarawneh ◽  
Lee Siang Chuah ◽  
...  
Keyword(s):  
Annealing Temperature ◽  
Optical Measurement ◽  
Sol Gel ◽  
Computational Modelling ◽  
Electromagnetic Response ◽  
Optical Frequency ◽  
Oxide Coatings ◽  
Film Coatings ◽  
Thin Film Coatings ◽  
Post Annealing

The annealing temperature (200–500 °C) effects of optical frequency response on the dielectric functions of sol–gel derived CuCoOx thin film coatings: experimental and modelling.

QUANTITATIVE ANALYSIS FOR Cr(III) AND Cr(VI) IONS IN ENVIRONMENTAL WATER SAMPLES BY USING PIXE

2005 ◽  
Vol 15 (01n02) ◽  
pp. 73-83
Author(s):  
H. YAMAZAKI ◽  
K. ISHII ◽  
Y. TAKAHASHI ◽  
S. MATSUYAMA ◽  
TS. AMARTAIVAN ◽  
...  
Keyword(s):  
Sample Preparation ◽  
Water Samples ◽  
Preparation Method ◽  
Total Concentration ◽  
Ph Dependence ◽  
Ferric Hydroxide ◽  
Environmental Water ◽  
Pixe Analysis ◽  
Beam Currents ◽  
Preparation Techniques

An enhanced sample preparation method for PIXE analysis is described allowing to separate and concentrate chromium ions of different valence in water samples. Cr 3+ ions are selectively adsorbed by ferric hydroxide colloids generated in the solution, and a PIXE target for analyzing the total concentration of chromium of hexavalent and trivalent states is prepared by depositing 0.15 ml of sample solution on a user-made thin polycarbonate film. PIXE analyses for the two kinds of targets reveal the fractions of chromium of different oxidation state. The standard method for collecting the colloids adsorbing Cr 3+ ions on Nuclepore filter of 0.2 μm pores is based on an investigation of the pH-dependence of the recovery of dissolved Cr 3+ ions and the calibration curve is measured. The prepared targets were examined for 5 to 10 minutes by 3 MeV proton beams (0.7-5 nA beam currents). The lower detection limit of chromium in a 25 ml aquatic sample is 1 ppb for the Cr 3+-precipitated targets and 3.4 ppb for the CrO 42--deposit targets based on the 3σ error of background counts integrated over the FWHM of chromium peak in the PIXE spectrum. The applicability of PIXE using these sample-preparation techniques for determining chromium oxidation states was confirmed using river water samples to which Cr 3+ and CrO 42- ions were added in 50 ppb concentrations.

Electrophoresis in the sol-gel formation of heterophase thin-film coatings

2011 ◽  
Vol 37 (5) ◽  
pp. 545-548 ◽  
Author(s):  
O. A. Shilova ◽  
S. V. Hashkovsky ◽  
T. V. Khamova ◽  
K. E. Pugachev
Keyword(s):  
Thin Film ◽  
Sol Gel ◽  
Gel Formation ◽  
Film Coatings ◽  
Thin Film Coatings

Thin film coatings of (Ca0.6, Mg0.4)Zr4(PO4)6 on Si3N4 and SiC

1994 ◽  
Vol 9 (8) ◽  
pp. 2014-2028 ◽  
Author(s):  
T.K. Li ◽  
D.A. Hirschfeld ◽  
J.J. Brown
Keyword(s):  
Thin Film ◽  
Corrosion Resistance ◽  
Thermal Shock ◽  
Thermal Shock Resistance ◽  
Sol Gel ◽  
Dip Coating ◽  
Ceramic Filters ◽  
Film Coatings ◽  
Thin Film Coatings ◽  
Shock Resistance

Thin film coatings of (Ca0.6, Mg0.4)Zr4(PO4)6 (CMZP) on Si3N4, and SiC substrates, including porous SiC used in ceramic filters, were investigated using sol-gel and dip coating techniques. The coating thickness, ranging from 1 to 5 μm, was found to vary with the selected precursors and their concentrations in the solution. When applied to Si3N4 and SiC, CMZP coatings exhibit good thermal shock resistance and greatly improved alkali corrosion resistance. For porous silicon carbide, homogeneous, crack-free coatings were formed on both the outer surface and the interior sections of the pore walls. The CMZP coatings on Si3N4 and SiC exhibit good thermal shock resistance. The CMZP coating greatly improved the alkali corrosion resistance of Si3N4 and SiC.

Temperature effects on the LIDT of single- and multilayer sol-gel-derived thin film coatings

2001 ◽  
Author(s):  
Nicholas J. Bazin ◽  
James E. Andrew ◽  
Hazel A. McInnes ◽  
A. J. Morris
Keyword(s):  
Thin Film ◽  
Temperature Effects ◽  
Sol Gel ◽  
Film Coatings ◽  
Thin Film Coatings

Analysis of depth profiles of sol-gel derived multilayer coatings by Rutherford backscattering spectrometry and by cross-sectional transmission electron microscopy1

1991 ◽  
Vol 6 (4) ◽  
pp. 835-839 ◽  
Author(s):  
Carol L. Schutte ◽  
Patrick M. Smith ◽  
George M. Whitesides
Keyword(s):  
Rutherford Backscattering Spectrometry ◽  
Sol Gel ◽  
Compositional Analysis ◽  
Rutherford Backscattering ◽  
Multilayer Coatings ◽  
Cross Sectional ◽  
Film Coatings ◽  
Thin Film Coatings ◽  
Transmission Electron ◽  
The Individual

This paper describes the preparation and compositional analysis of multilayer thin-film coatings prepared using sol-gel techniques. Alternate layers were labeled with an iron tag, derived from hydrolyzed 1,1'-bis(triethoxysilyl)ferrocene. Iron-free layers were composed of SiO2 derived from hydrolyzed tetraethylorthosilicate (TEOS). Analyses of these systems were based on Rutherford Backscattering Spectrometry (RBS) and Cross-Sectional Transmission Electron Microscopy (XTEM). The depth profile of iron, measured by RBS, yielded thicknesses (1000–1600 Å) for the individual layers that could be verified independently by XTEM.

scholarly journals Surface structural features and optical analysis of nanostructured Cu-oxide thin film coatings coated via the sol-gel dip coating method

2019 ◽  
Vol 45 (10) ◽  
pp. 12888-12894 ◽  
Author(s):  
Amun Amri ◽  
Kamrul Hasan ◽  
Hatem Taha ◽  
M. Mahbubur Rahman ◽  
Syamsu Herman ◽  
...  
Keyword(s):  
Thin Film ◽  
Sol Gel ◽  
Structural Features ◽  
Dip Coating ◽  
Oxide Thin Film ◽  
Optical Analysis ◽  
Film Coatings ◽  
Thin Film Coatings ◽  
Coating Method ◽  
Dip Coating Method

Methods of Sample Preparation for Detecting Alkaline Phosphatase in Casein: Collaborative Study

1986 ◽  
Vol 69 (4) ◽  
pp. 658-659
Author(s):  
Gopala K Murthy ◽  
James T Peeler ◽  
◽  
L Bassett ◽  
B Dickerson ◽  
...  
Keyword(s):  
Alkaline Phosphatase ◽  
Sample Preparation ◽  
Preparation Method ◽  
Collaborative Study ◽  
Sample Preparation Method ◽  
Colorimetric Test ◽  
Preparation Techniques

Abstract A collaborative study was conducted in which 2 different sample preparation techniques were used to determine alkaline phosphatase in casein by the rapid colorimetric test. Seven collaborators tested 10 unknown casein products containing different amounts of residual phosphatase. Results indicated that the phosphatase contents of casein prepared by the 2 methods were not significantly different. The collaborators correctly analyzed 100% of the test samples that were ground and 98 % of the test samples that were unground. The alternative rapid sample preparation method has been adopted official first action.

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