Materials Literature
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The hydrophilization treatment of polyimide is important in various applications. This paper has described the experimental research findings which explore what the parameter with large effect in the plasma treatment of polyimide is. The low pressure surface wave plasma of the argon oxygen mixed gas which can expect l…
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We have designed and implemented a hierarchical simulation methodology capable of addressing the growth rate and microstructural features of thin silicon films deposited through PECVD (Plasma Enhanced Chemical Vapor Deposition). Our main objective is to elucidate the microscopic mechanisms as well as the interplay bet…
Quaternary TiZrAlN films are: • perspective for both oxidation and wear resistance applications and expectant substitution for TiN, (Ti,Al)N and (Ti,Zr)N hard films; • capable to possess by the unique properties due to possibility of nanocomposite structure formation during their synthesis. The aim of the present work…
Plasma nitriding is achieved by spraying the nitrogen pulsed-arc plasma jet under atmospheric-pressure N2/H2 mixture. The quality of nitriding is found to depend on the H2 flow rate, which has an optimal value. We propose a simple mechanism of this dependence. Moreover, the amount of H2 necessary for best nitriding ca…
Significant tool life improvements are attained by the application of harder and more wear-resistant materials and coating systems. In this context, the tools’ cutting edges affect directly the overall tool performance. In this paper, by impact tests at the cutting edge vicinity, a quick assessment of the cutting edge…
In this study, the thermal shock behaviour of a thermal barrier coating system of a gas turbine engine’s turbine blade of the space and aircrafts are evaluated. The thermal shock behaviour of the thermal barrier coating system was investigated. Computer-assisted thermal (ANSYS) and crack growth (FCPAS) analyses were c…
In this communication we report on the fabrication of two different heterostructured core@shell 1D materials by low temperature (135 oC) plasma enhanced chemical deposition: Ag@TiO2 and Ag-NPs@ZnO nanorods (NRs). The controlled formation of these heterostructures on processable substrates such as Si wafers, fused sili…
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Carbon nanotubes (CNTs) are grown with a three steps process combining pulsed laser deposition and radio frequency plasma enhanced chemical vapor deposition techniques. The result is a dense thin film made of vertically aligned and multi-walled CNTs. To characterize the thermal properties of the film by pulsed phototh…
For biomedical application in the field of artificial hip joints diamond-like carbon (DLC) coatings have been widely studied due to their excellent mechanical, tribological and biological properties. The wear particles as the main factor limiting the life expectancy of hip joints have attracted more and more interest,…
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In the last few decades, the amorphous or nanostructured carbon structures prepared by several deposition techniques are a subject of considerable research interest due to their excellent properties, such as high hardness and chemical inertness, wear resistance or low friction. There have been also attempts to improve…
Superhard nanostructured Ti–Hf–N(Fe) coatings are prepared. The formation of local regions of (Ti, Hf)N, FeN, and Hf is detected using µ-PIXE (ion microbeam). It is revealed that the synthesized coatings have a nanohardness of 48 ± 1 GPa and are composed of nanograins with a size of 4.8–10.6 nm, which are enveloped by…
Erbium (Er)- and ytterbium (Yb)-doped Si (Si:Er,Yb) thin films have been controllably synthesized over the Er and Yb concentrations ranging from 1018 to 1020 cm-3 by laser ablation technique. From the PL spectra and the concentration dependence of the intensity of Er3+ emission at 1.54 µm, Yb3+ acts as an efficient se…
Thermal barrier coatings have significant interest for protecting of the effect of high temperature the materials used under high temperature. To coat the materials used under high temperature such as gas turbine liners, is considerably important. Yttria stabilized zirconia (YSZ) is the most common material used for t…
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The low density of magnesium alloys makes them especially attractive especially for the automotive, electronic and aeronautical industries. Unfortunately, magnesium alloys have a strong susceptibility to atmospheric, galvanic and pitting corrosion and need to be protected with anticorrosive coatings. Traditionally mag…
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