Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Hot forging is a conventional forming process at elevated temperatures that is frequently used to produce bulk parts and components. By designing such hot forming processes FE simulations have been increasingly used. In this work, deformation behaviour of two common medium carbon steels was characterized at their hot-…
Electrostatic charging of hydraulic circuits is recently becoming an issue as low conducting hydraulic fluids are increasingly in use. Charge generation is more likely to accumulate and build up large voltages. These high charge accumulations are hazardous as they can damage system components such as filters, which ca…
Molecular geometries and electronic properties of 3-alkylthiophenes (ATs) and their oligomers (OATs) are studied by the density functional theory (DFT). Calculations are performed on the oligomers formed by n repeating units, where n ranges from 1 to 6, using the B3LYP/6-31G** level of theory. The results obtained sho…
A very good approximate, closed-form solution to the reaction rate equation with Arrhenius temperature dependence is derived, valid for activation energies E ≫ kBT0 (kB is Boltzmann constant and T0 is room temperature) and monotonically decreasing temperatures. This solution is then used to develop a transfer function…
During EUV exposure, more frequent mask cleaning is essential for removing not only particles from lack of pellicle but also the carbon contamination due to accumulative EUV exposure. Because of this reason, process improvement for minimize corrosion and etching of the Ru capping layer is urgently needed. In this work…
193nm binary photomasks are still used in the semiconductor industry for the lithography of some critical layers for the nodes 90nm and 65nm, with high volumes and over long periods. However, these 193nm binary photomasks can be impacted by a phenomenon of chrome oxidation leading to critical dimensions uniformity (CD…
We study the impact of a super-structuration of the transparent conducting electrode made of polycrystalline ZnO:Al on the efficiency of thin solar cells based on amorphous silicon. We demonstrate that photonic crystal cavities etched in the electrode present efficient anti-reflective properties and add absorption res…
Bei der Erzeugung hochwertiger Stahle nach dem LD-Verfahren (Linz-Donawitz), wie es bei der Saarstahl AG angewandt wird, ist es verfahrensbedingt unmoglich, Stahl ohne Eintrag von Sauerstoff und die daraus resultierenden nichtmetallischen oxidischen Einschlusse herzustellen. Als mogliche Quellen kommen dabei die Desox…
In recent years, the DUPLEX surface treatment, consisting of vacuum gas nitride followed by physical vapor deposition (PVD) coating, has earn a lot of interest for enhance the wear performance of high temperature forming application, especially hot forging. In this work the wear performance of hot forging tool steel g…
International audience
International audience
ABSTRACT :Tiang pancang adalah bagian-bagian konstruksi yang dibuat dari berbagai bahan bangunan (kayu, beton atau baja) yang digunakan untuk mentransmisikan beban-beban permukaan ketingkat-tingkat permukaan yang lebih rendah dalam massa tanah. Hal tersebut dapat merupakan distribusi vertikal dari beban sepanjang poro…
Woodworking is based on a trinomial machine/piece/tool. For maximum quality of the manufactured piece, it is important not to separate this trinomial, but the limited life of tools prevents that permanent contact. This phenomenon is due to the wear of the cutting parts of the tools. The prevention of wear is based on…
This study proposes a methodology to design a shape memory alloy micro-actuator as a new handling device of Head Gimbal Assembly (HGA). The actuator consists of several finger-like Nitinol-and-Polyimide bimorph beams that are able to deflect at high temperature due to thermally induced strain mismatch between these tw…
Native defects in mask blanks is one of the key issues in extreme ultraviolet lithography. If defect-free mask blanks is the only solution, the resulting cost will be very high due to the low yield of such blanks. In this paper, we present a method for fabricating defect-free-like EUV masks by implementing several nov…
The current decay characteristic in the time domain is studied in Y3+ and Mn2+ modified Ba0.67Sr0.33TiO3 ceramics under different temperatures (25 °C–213 °C) and voltage stresses (0 V–800 V). The decay of the current is correlated with the overlapping of the relaxation process and leakage current. With respect to the…
Equal Channel Angular Pressing (ECAP) is a very interesting method for modifying the microstructure in producing materials with ultrafine grain in sub-micrometer or nanometre range. Experiments demonstrate that these ultrafine structures may exhibit, by comparison with large - grained polycrystals, major differences i…
The etch chambers has been cleaned by wet process and replaced with new parts to maintain etch chamber perfectly clean. However, the wet cleaning process results in following issues. One of issues is that the critical dimension mean to target (CD MTT) and phase-shift would be changed due to the variation of etch rate,…
ABSTRACT Composite gels and films were prepared by the blending of hydrated gelatin as a base material and hydroxypropyl methylcellulose phthalate (HPMCP) at various mass ratios. A composite technology was applied to obtain improved mechanical, physicochemical, and antimicrobial properties of the gelatin used as a bas…
Photomask used for optical lithography has been developed for purpose of fabrication a pattern along with finer designed rules and increase the productivity. With regard to pattern fabrication on mask, EB (Electron beam) mask writer has been used because it has high resolution beam. But in producing photomask, minimum…