The structure and strength of Al−xSi−2wt.%Cu (x = 15, 17 20wt.%) alloys obtained by directional solidification at a rate 0.1 0.8mm/s are investigated. It is shown that the tensile increases with an increase in due to decrease size eutectic silicon transformation its crystal flake into fine-fiber one. In addition, there was share intermetallic phase, exceeding reduced amount α-Al phase. An conte...

This poster describes an application under development that supports quantitative analysis of 3D models of stone tools. The models are created from original artifacts by using a laser scanner. The application currently supports interactive labeling of flake scars on flint cores. We discuss our ideas for automatic labeling and future enhancements to the application.

Graphene can be synthesized from polyacrylonitrile (PAN) polymer through pyrolysis. A metal catalyst such as nickel (Ni) is required for the conversion of the polymer to graphene. The metal catalysts can be placed either atop or underneath the polymer precursor. We observed that spatially non-uniform and disconnected graphene was fabricated when PAN film coated with a Ni layer was pyrolyzed, re...

The novel approach for deposition of iron oxide nanoparticles with narrow size distribution supported on different sized graphene oxide was reported. Two different samples with different size distributions of graphene oxide (0.5 to 7 μm and 1 to 3 μm) were selectively prepared, and the influence of the flake size distribution on the mitochondrial activity of L929 with WST1 assay in vitro study ...

The internal lateral ligament is the ligament most frequently damaged. Usually a few of the upper fibres are torn away from the periosteal attachment at the lower end of the femur. Occasionally, however, the deep fibres which are attached to the internal semilunar cartilage are partially torn without the cartilage being damaged. Occasionally, the external lateral ligament is injured. With more ...

This work reports on recent advances in the deposition of non-wettable coatings with high water contact angles (WCAs). We propose a simple and easily-controlled method for fabricating different types of nanoestructured films of Al2O3 with hydrophobic properties by Physical Vapour Deposition (PVD). The films have been deposited over three types of hydrophilic substrates with very different value...

Themechanical behaviorof grapheneflakesunderboth tension and compression is examined using a cantilever-beam arrangement. Twodifferent sets of samples are employed.One consists of flakes just supported on a plastic bar. The other consists of flakesembeddedwithin theplastic substrate.Bymonitoring the shift of the 2DRaman linewith strain, information on the stress transfer efficiency as a functio...

M. Górny, R. Dańko, M. Holtzer. AGH University of Science and Technology, Faculty of Foundry Engineering, Kraków, Poland This article addresses the effect of mold filling and wall thickness on the flake graphite layer in ductile iron. The research was conducted for castings with different wall thickness (3-8 mm) and using molding sand with furan resin. A thermal analysis has been performed alon...

We demonstrate that near-edge X-ray-absorption fine-structure spectra combined with full-field transmission X-ray microscopy can be used to study the electronic structure of graphite flakes consisting of a few graphene layers. The flake was produced by exfoliation using sodium cholate and then isolated by means of density-gradient ultracentrifugation. An image sequence around the carbon K-edge,...