Influences of micro-blasting as surface treatment technique on properties and performance of AlTiN coated tools

AbstractHydrophobic property of PDMS surface was improved by the 400 W UV-Vis lamp light irradiation in the atmospheric condition for several ten minutes. As a result of this surface treatment, the surface became to hydrophilic character for one month long. This surface treatment technique applied to PDMS micro-fluidic device and verified valve-less switching. The UV-Vis light irradiated to PDMS micro fluidic pattern with partly covered by aluminum foil. Finally inlet and outlets were connected 0.5 mm diameter tubes. The syringe pumps injected the distilled water into the inlet of the PDMS micro channel at the flow rates of 0.5, 5.0, and 50 μl/min for the both width channel. As results of water injection water flowed only the UV-Vis treated channel at the flow rates of 0.5 and 5.0 μl/min. On the other hand, the water flowed for all channels at the flow rate of 50 μl/min. This result was observed from 5.0 μl/min flow again for both width devices which dried by air. These results were occurred by the difference of the flow conductance and wettability. The mechanism of this hyrophilicity of PDMS was reported to form Si-O in the surface by means of glassy surface. From the IR spectra, the Si-O-Si peak shifted to higher wave number for UV-Vis irradiated PDMS than the untreated PDMS comparing with the other IR peaks. This result showed that the Si-O-Si network bonding of PDMS changed to the O-Si-O bonding around the surface.

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A Process Model for Laser Surface Treatment of Plasma Sprayed Coatings

Heat Transfer, Volume 2 ◽

10.1115/imece2004-59969 ◽

2004 ◽

Author(s):

J. Wu ◽

J. Choi ◽

S. Zhang ◽

G. Hilmas

Keyword(s):

Surface Roughness ◽

Surface Treatment ◽

Process Model ◽

Laser Surface ◽

Treatment Technique ◽

Beam Diameter ◽

Laser Surface Treatment ◽

Coating Quality ◽

Porosity Level ◽

Plasma Sprayed

Advanced ceramics are not easily fabricated and consolidated by the plasma spray technique because of their extremely high melting temperature. Zirconium diboride (ZrB2) has been successfully plasma sprayed, but the coatings are quite porous. The high levels of porosity are usually a result of unmelted ZrB2 particles that have been incorporated into the coating during deposition. Applying a laser surface treatment to reduce both the porosity and the coating surface roughness, and to improve the coating quality, is of great interest. A laser based surface treatment technique provides a well-controlled heat input, with minimal or no distortion. In this study, a two dimensional mathematical model is developed to investigate the effects of laser power, beam diameter and level of porosity on the coating quality, incorporating melting, solidification, and evaporation phenomena. A continuum model is used to solve Navier-Stokes equations for both solid and liquid phases. Volume-of-Fluid (VOF) is incorporated to track the free surface. The surface force is incorporated as a body force instead of a boundary condition. The porosity level and surface roughness before and after the laser surface treatment are simulated and compared with experimental results.

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DETERMINATION OF RATIONAL PARAMETERS OF ROTARY SURFACE TREATMENT ROTATION WHEN RESTORING LARGE PARTS

Bulletin of Belgorod State Technological University named after V G Shukhov ◽

10.12737/22647 ◽

2016 ◽

Vol 1 (12) ◽

pp. 121-125

Author(s):

Федоренко ◽

Mikhail Fedorenko ◽

Бестужева ◽

Olga Bestuzheva ◽

Бондаренко ◽

...

Keyword(s):

Surface Treatment ◽

Content Validity ◽

Economic Effect ◽

Dynamic Loads ◽

Industrial Equipment ◽

Solid Materials ◽

Rational Combination ◽

And Performance

In various industries for production of cement, lime, gypsum, ceramic products for grinding solid materials using ball tube mills. In the process of operation under load of the mill, the wear of the main bearings of the drum tube mills – axles, with the result that on the surface appear different defects. The quality and performance of cement plants are directly dependent on the accuracy of its reconstruction, repair and content validity, determining largely technical and economic effect from the use of modern technical devices. Mill work in the area of large dynamic loads, leading to loss of efficiency and as a result long downtime to repair. With a view to their reduction, currently, to restore industrial equipment used in portable machines. Optimization of processing of surfaces of rotation when restoring large parts will allow you to obtain a rational combination of the varied parameters.

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Development of Surface Treatment Technique With Photolytic Macromolecule Including RGDS Peptide

Volume 3: Biomedical and Biotechnology Engineering ◽

10.1115/imece2016-66466 ◽

2016 ◽

Author(s):

Y. Taki ◽

Y. Morita ◽

S. Nishimura ◽

A. Hirata ◽

T. Koga ◽

...

Keyword(s):

Surface Treatment ◽

Polymer Film ◽

Propionic Acid ◽

Polymer Films ◽

Radical Copolymerization ◽

Adhesive Property ◽

Ultraviolet Rays ◽

Treatment Technique ◽

Cell Adhesive ◽

Spin Coater

Arg-Gly-Asp-Ser (RGDS) coating is one of effective methods to improve the cell adhesive property of the scaffold surface. However, it is difficult to regulate the RGDS quantity and distribution, and to visualize RGDS distribution. The purpose of this study was to develop a surface treatment technique that the RGDS quantity can be regulated with the ultraviolet rays irradiation and the RGDS distribution can be visualized with the fluorescence. P(MMA-g-ANP-RGDS) and P(HEMA-g-ANP-RGDS) were respectively synthesized by radical copolymerization of methylmethacrylate (MMA) and 2-hydroxyethylmethacrylate (HEMA) with peptide-macromonomer containing photo-labile linker (3-amino-3-(2-nitrophenyl)propionic acid (ANP)) and RGDS. Each polymer film was produced by using spin-coater, and then ultraviolet rays was irradiated to the each film through the glass mask with three different ultraviolet rays transmissivity of 0 %, 30 % and 60 %. In both polymer films, the RGDS quantity can be regulated by ultraviolet rays irradiation, and the luminance decreased same as the RGDS quantity. Adherent osteoblast-like cells were not observed on P(HEMA-g-ANP-RGDS) film, but the number of adherent osteoblast-like cells was increased with increasing the RGDS quantity on the P(MMA-g-ANP-RGDS) film. In conclusion, we accomplished to develop the surface treatment technique with P(MMA-g-ANP-RGDS) to regulate and visualize the RGDS quantity and distribution.

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